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Torque converter going in and out of lock up?
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Torque converter going in and out of lock up?
Understanding the torque specifications of your engine can help you get the most out of your vehicle Common transmission problems include transmission fluid leaks, worn or damaged torque converters, solenoid damage and clutch problems. In this video I explain what to look for when your torque converter clutch is locked up. Dec 1, 2018 · The added valves were “switch valves,” “lockup control valves” or with the three (3) path converters “bypass valves. 141 posts · Joined 2018 200-4R and 700-R4 transmissions cut off flow to the oil cooler when in overdrive. I was reading that it could be the lockup solenoid going bad, or the torque converter itself dying. Advertisement Depending on w. 200,000 hard miles and still going strong. One of the main reasons why is because the 4L80-E doesn't have the ability to cool off the fluid if it gets too hot while in mechanical lockup. That should fix your problem and save you a lil money also. I am familiar with the general workings of a torque converter. If there was a loss of voltage feed to the transmission, the solenoid would not be triggered. Now, after being so adamant about the problem and arguing with me, I got a call today, saying its torque converter and what he called a lock out solenoid. If the cause of your shuddering transmission is low fluid rather than contaminated transmission fluid, you may just need to fill up your. Oct 17, 2014 · Solution #1: In most cases, the rules above apply in reverse for converters with too high of a stall. 01192 - Torque Converter Lock-Up Clutch 003 - Mechanical Failure Freeze Frame: Fault Status: 00100011 Fault Priority: 2 Fault Frequency: 1 Reset counter: 0 Mileage: 131825 kmTime Indication: 0Date: 204317 Time: 13:09:05* Going by the Mileage counter this seems to have happened one kilometre into my drive after the fluid change. In GM vehicle's the speed at which lock-up clutch engage-ment occurs is controlled either by hydraulic circuits inside the transmis-sion or by the vehicles Electronic Con-trol Unit (ECU). Looking for some help/advice. Jun 7, 2008 · briscoe. Read Also: Bad Torque Converter vs. The solenoid gets energized and redirects fluid flow back, through the input shaft - this now increases pressure within the clutch area and causes it to engage with the torque converter's front. So either way, something doesn't add up. Torque converter doesn't lock up. If you feel that your idle is a bit jumpy and sometimes too low and sometimes too high, it could be a torque converter problem. When I bought it, owner said it had some shifting problems. Make sure the tachometer is viewable from the driver's seat. My guess at this point would be a bad converter. The PCM (or ECM, which ever it is) allows lockup to occur around 12 or 13% TPS, and then unlocks around 11% So if I'm cruising along around 60 km/h in 3rd gear, at 13% it'll lock, throttle will have to back off a little bit to maintain speed now that the trans is locked, lose a couple % TPS, then unlock. The engagement of this clutch causes the engine to lock to the transmission input shaft thereby leading to a direct 1:1 drive ratio. This is how to carry it out: Turn the ignition key and start up the engine. Low fluid levels or an improper transmission. It does it about half the time in 1st, but just about every time in reverse. A rather simple test can determine whether the torque converter is failing. Disconnecting the battery will almost always cure the problem for a couple months. If I depressed on the throttle it would stay unlocked. Solution #1: In most cases, the rules above apply in reverse for converters with too high of a stall. Wait for a few minutes for the engine to warm up, then gently press the accelerator twice and rev up the engine. If I depressed on the throttle it would stay unlocked. The turbine is also having a lock-up clutch at its back. This allows you to ensure you use … See more My SUV’s torque converter goes in and out of lock up when going a steady cruising speed. TPS and engine RPM all parameters factor in. Some will lock up in all but 1st gear for instance. Replaced torque converter and solenoid still acted up, figured new torque converter was faulty replaced it again. I am starting to get irritated with not having torque converter lock-up on the highway only, and I believe TC shudder is the cause of it. The lock-up torque converter is a feature found in many modern vehicles equipped with automatic transmissions. The torque converter clutch (TCC) piston in the lock up torque converter worked like a one-way valve. However, a borrower generally can. He had similar issues once the tranny warmed up until they replaced the converter. The 700-R4's 2,500-rpm-stall converter wouldn't lock up, resulting in excessively high rpm and reduced mileage at freeway speeds. I was reading that it could be the lockup solenoid going bad, or the torque converter itself dying. In his case, it was a bad rebuild (or maybe they never even replaced the TQ in the first place). If longer, inspect pump bushing for wear Rear Band Mis-adjusted Valve Body Filter Plugged. Actually it was the seal leaking. It almost kills the engine before the ECM speeds it back up and slips the rear drum brakes. In case anyone is doing a 700R4 conversion I thought I'd throw this out there. Mar 31, 2018 · Connect the other end of the jumper wire to ground. This issue should be investigated before replacing the solenoid, as it may be due to a lack of voltage reaching the. I have a 2008 Chevy Impala SS. Transmission whine, trembling, engine stalling at idle, or check engine light. At the front passenger-side of the case, there is a solenoid retained by two bolts. While driving a constant 65 mph, on level ground, the engine RPMs will go from 1700 to 2000 and then back again. TC Lockup occurs in 2-6 in the 6R80, and 1-10 in the 10r80. I replaced the transmission lines, pan- deep ppe, trans filter and. Contaminated Transmission Fluid 3. This real-time data exchange enables the transmission to make highly informed gear-shifting decisions, all while. The off delay would cause it to keep the TC locked when it shifts from 3rd to OD which Dave says is ok and not as harsh. When this happens, your torque converter has a higher effective stall speed Shuddering. We also include a cruise control style brake … However, when the engine turns more slowly it causes the torque converter to slip, creating heat. By following these diagnostic procedures and using the right tools, you can diagnose torque converter problems and take the necessary steps to repair your vehicle. Fortunately, fixing a shuddering transmission is often as simple as getting a transmission flush to replace the contaminated transmission fluid with clean, fresh fluid. torque convertor goes in and out of lock up with a/c on only. One of the best ways to make sure you can play all of your TV shows and movies on any device, anywhere you go, is by making sure they're all in the same format and have the same co. When i get on the interstate it will kick into lockup normally and i can run up to 70mph or so. This is a normally open solenoid and if it is stopped up will not allow the solenoid to exhaust signal fluid. Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. I was driving down the highway and noticed the rpms drop from normal cruising (3400) at 70mph. Once it returns to its idle state, press the brake pedal all the way and shift. Originally Posted by 1. When the converter is not locking up you will notice the engine’s RPMs staying higher under load at highway speeds. More TPS is now required to maintain speed. I noticed when it locked the rpm hardly changed at all. 4,658 #3. Connect the other end of the jumper wire to ground. While on the flat for example, the tach may read 2500, then when transitioning to a slight grade, the tach will actually go down by about 200 RPM. With OD off this can occur around 35mph in 3rd and feels like a 4th shift. is justin eddins still on lone star law Other time the lock up just all the sudden started to slip. The number one cause for that code is the torque converter clutch not locking up. I did and apps reset and it fixed the problem for a couple of weeks but it is now shifting in and out of lockup constantly again. Dec 4, 2019 · The clutch that locks the transmission to the engine at highway speed can wear out just like a normal manual transmission clutch Bad Seals. People use a torque converter lockup because it provides fuel economy. The PCM (or ECM, which ever it is) allows lockup to occur around 12 or 13% TPS, and then unlocks around 11% So if I'm cruising along around 60 km/h in 3rd gear, at 13% it'll lock, throttle will have to back off a little bit to maintain speed now that the trans is locked, lose a couple % TPS, then unlock. While driving a constant 65 mph, on level ground, the engine RPMs will go from 1700 to 2000 and then back again. If the trans is slipping, it should set a fault and light the CEL. Over time, the friction material on the torque converter clutch can wear out, causing the clutch to slip or engage improperly. If you're not sure if lock-up occurred, then hold a steady speed of 60 mph (on the lift) and lightly touch and release the brake. If you're not sure if lock-up occurred, then hold a steady speed of 60 mph (on the lift) and lightly touch and release the brake. I am starting to get frustrated and I want to avoid throwing any more parts at it. Also, before anyone asks, I do have the tv cable set up properly using bowtie overdrives tv made easy system for the edelbrock 1406 carb. Lockup torque converters are a type of converter that has a clutch. Does 1650 stall speed sound reasonable? I don't. macys misses tops The reason disconnecting the battery seems to correct the. Although the rod was spirited around town. The pin locations in the connector are labeled, but they're hard to see 4L60E going in and out of lock up Help Please. Torque converter that works based on a K-factor input table. shortly after the tps change the lock up problem started to occur occasionally, then progressively got worse learned about the tv cable started messing with it, sometimes good sometimes bad, but always seemed to end up back to beginning Took the $60 TPS back off and put the old one back on. It happens randomly on … I am having trouble with my 1992 Chevy 2500 plow truck with a 6 The torque converter is coming in and out of lock up in third and fourth gear. In order to get it to lock up I would have to level out the acceleration or let up on the throttle. I was reading that it could be the lockup solenoid going bad, or the torque converter itself dying. At a cost of about $600, it performs a lockup of the torque converter through manual operation of a dash switch, at any speed and in any gear between 2nd and 6th. When I give it gas, the rpms go up but the truck doesn't move much faster, like its slipping. 3 posts · Joined 2010 I have a 2001 dodge cummins with 47re and my torque converter doesnt always lock up. Today we're diving in to the often debated & sometimes mysterious topic of single disc vs. One of the signs of a failing torque converter is your car roughly accelerating or decelerating. The plus side is you'll get REALLY good at R&Ring. When this happens, your torque converter has a higher effective stall speed Shuddering. It engages fine when I am on back-roads with no issue. A lot times the TP sensor can get "noisy" or basically it starts producing an erratic voltage causing things like the T/C to lock/unlock. So this would need to be checked before merely replacing the torque converter clutch solenoid. where are my reminders issues that arise after a particular transmission has had lots of real world "testing. Dec 3, 2019 · Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. It's usually pretty detectable, as there will be a pool of fluid underneath your Trailblazer New post about my 700r4 going into torque converter lock up as soon as I put it in gear (any gear). The warning signs of a bad torque converter include transmission slippage and surging, partial loss of vehicular power, problems when attempting to switch gears and abnormal engine. Its primary function is to eliminate the energy … Anyway, the transmission shifts just fine. d^2 Discussion starter. Jul 1, 2013 · He had similar issues once the tranny warmed up until they replaced the converter. For balancing reasons, the bolt pattern between the torque converter and the flexplate often-but not always-allows only one orientation of. The 48RE transmission has a virtually identical torque converter; suffering from the same benefits and ailments as one another. Be sure to have the car checked for vacuum leaks or other potential problems that can affect the idle of your engine before working on the torque converter. 6L80E/6L90E Torque Converter Questions. It will not lock going up hills, heavily loaded unless at a sustainable cruising speed on flatter ground. Vacuum switch will deny lock-up under wide open throttle, heavy acceleration, and while ascending steep grades. GM Convertor Lock-Up and the TCC Solenoid. When this clutch is engaged, it results in the engine locking to the transmission input shaft, which then causes a one-to-one drive ratio. Keep in mind that you can apply the approach we'll go through to other models with a torque converter clutch and speed sensors. Release or press throttle and it clears up Turned 189,000 today. This is one of the most common issues that causes a torque converter to go bad.
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i call BS cuz it used to 700r4 hydraulic lock-up, torque converter stall speed Briano605 & Trees, Thanks for the info (also nice rides). Jun 22, 2021 · It FEELS to me like the TCC is trying to engage. The torque converter clutch (TCC) piston in the lock up torque converter worked like a one-way valve. The problem is independent of speed Same goes for a brake lamp switch getting shorted or hyper-sensitive and going off when. Dec 3, 2019 · Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. I personally don't recommend more than a 50% reduction of TM on a stock trans. One of the best ways to make sure you can play all of your TV shows and movies on any device, anywhere you go, is by making sure they're all in the same format and have the same co. " With a stock converter it's not likes it's suddenly going to be slamming gears like a drag car or something, but yeah it'll firm up the shifts a bit. Cause it sure doesnt seem to be locking! I get the 4 gears, but no drop in RPM from a converter locking. Lockup won't happen until the engine reaches. It won't do this at lower speeds so your Titan can take advantage of the torque multiplication that a torque converter provides. well, there a 2 parts to a torque converter, the torque converter and then the lock up clutch in it. Lockup torque converters release anytime the brakes are applied. When the torque converter is "locked up", the transmission's input shaft will spin at engine RPM. Bad solenoid pack or, more than likely, its a stuck valve in the pump. The valve changes the pressure and direction of transmission fluid flow in the torque converter. An ECU (Engine Control Unit) transmission lock-up kit is a performance upgrade designed to optimise your Toyota's transmission. salad bars nearby Completing the ground will lock up the torque converter clutch. Same goes for a brake lamp switch getting shorted or hyper-sensitive and going off when hitting bumps and such. I wasn't sure if the diagrams would open or not. Properly torquing lug nuts is crucial for the safety and performance of yo. A bolt torque chart provides valuable information regarding the amount of torque required. I personally don't recommend more than a 50% reduction of TM on a stock trans. Last week we asked you which convert. Road test for lock-up (can be done on a lift). Remember to support the car with Jack stands. lockup went cruising down the highway under light load, it does this when in overdrive & it seems to still do it whenD It does not shutter or vibrate when going. When I drag my truck at the strip, It locks up arounds 3000 Grand in 3rd. When your 4l60e’s TCC solenoid begins to fail, there are a number of obvious signs. It is possible, but not likely, that it is a problem. When the TCC solenoid receives a signal from the engine control module (ECM), it … A common problem for many General Motors cars is when the Torque Converter Clutch (otherwise known as TCC) fails to release. can't feel it going faster and it shifts good at all other times. It stalls the engine and I can't get it moving without a rolling start. Install the noise limiter. Lockup converters are believed to promote fuel economy and are found in most modern vehicles. I was reading that it could be the lockup solenoid going bad, or the torque converter itself dying. The 4l60e torque converter is designed to lock up primarily in 4th gear (can also be enabled to lock up in 3rd gear as well), so when it doesn’t lock, it’s quite noticeable. However, it is an essential component of automatic transmissions. rent a van to move out of state The need for an overdrive and lock-up torque converter led to the production of the 700R4 transmission, later upgraded to the 4L60 and 4L60e that is won't go from 2 to 1 or from 3 to 2. Writing a successful article does not end after you hit the publish button. If there is more than one switch down there, than you'll want to either google your make and model and figure out which one it is If you think that your TV cable may be going out, you can pick one up on Amazon for under thirty. Road test for lock-up (can be done on a lift). Completing the ground will lock up the torque converter clutch. Vacuum Switch Installation: Tee off of manifold vacuum to the supplied switch. Member of the Dropped Valve Seat Club. The 4l60e torque converter is designed to lock up primarily in 4th gear (can also be enabled to lock up in 3rd gear as well), so when it doesn’t lock, it’s quite noticeable. Both where the lock up part. Replaced torque converter and solenoid still acted up, figured new torque converter was faulty replaced it again. After the next stop light, it shifted perfectly with. there is a slim possibility that a loose/malfunctioning brake light switch will cause the torque converter to "unlock" but only when the parameters to lock the converter have been met, it is designed to unlock during braking if it is locked. TCC solenoid operation provides the modulation of hydraulic pressure to change the position of the bypass clutch control regulator valve. Standard welded units provide 0% slip for up to 2800 HP while the Bolt Together Lock Up. For balancing reasons, the bolt pattern between the torque converter and the flexplate often-but not always-allows only one orientation of. The problem is independent of speed Same goes for a brake lamp switch getting shorted or hyper-sensitive and going off when. Every once in a great while the Torque converter will lock up all the way, and 99. castle fanfiction archive 3L Power Stroke Diesel - understanding 4R100 Torque Converter Problems - Well to start with I have a problem when something goes bad I want to know what and why it broke. Dec 4, 2019 · This keeps your Silverado’s engine from turning at the right RPM for any given speed, which can really hurt fuel economy. When this happens, your torque converter has a higher effective stall speed Shuddering. A quick google search found this: 2001-2002 Trucks with 4R100 Torque Converter Clutch Solenoid Codes: Some trucks build between 1-1-01 to 5-1-02 may exhibit a flashing OD light and possibly harsh shifting, with any or all of the following trouble codes: P0740, P0741, P0743, P1744. lockup went cruising down the highway under light load, it does this when in overdrive & it seems to still do it whenD It does not shutter or vibrate when going. Learn about the torque converter and see pictures of a torque converter In the theory of mechanics, torque is a twisting force applied to an object. There is a solenoid in your GM converter that causes the the torque convertor clutch (TCC) to engage and disengage. The 48RE transmission has a virtually identical torque converter; suffering from the same benefits and ailments as one another. At any rate the lock up is controlled by the PCM & actuated by the TCC (torque converter clutch) solenoid which is inside the trans & I think you have to drop the pan & valve body to replace the solenoid. Fits perfect and it maintains the original cooler also, some people use aftermarket and bypass it. It wouldn't be a big deal, but the fuel mileage already sucks. Over time, the friction material on the torque converter clutch can wear out, causing the clutch to slip or engage improperly. If there is more than one switch down there, than you'll want to either google your make and model and figure out which one it is If you think that your TV cable may be going out, you can pick one up on Amazon for under thirty. From the bookbag to the purse to the briefcase to the car, a standard cell phone travels far and wide in a given day. Same goes for a brake lamp switch getting shorted or hyper-sensitive and going off when hitting bumps and such. I do also have converter drone at low rpms in lockup. feels like converter is going in and out. Learn about the torque converter and see pictures of a torque converter. While holding the brake pedal, press and hold the throttle. Next is to top off with 3 quarts of ATF+4 by pouring it down the dip stick tube. I was reading that it could be the lockup solenoid going bad, or the torque converter itself dying.
Rough idling is another common symptom of a bad torque converter. Put your foot under the brake pedal and hold it up I loosened the screws that hold the switch and pulled it back then retightened the screws. One of the most common reason. This may be due to high resistance in the torque converter. Slipping reduces fuel economy and heat can damage the converter and the … Lock-Up. If the brake switch input to the PCM indicates the brakes are on the TCC will release. When this happens, your torque converter has a higher effective stall speed Shuddering. 2004 chevy venture wiring diagram 5af7439ab7369.gif It FEELS to me like the TCC is trying to engage. Learn about the torque converter and see pictures of a torque converter. Next is to top off with 3 quarts of ATF+4 by pouring it down the dip stick tube. Or if at highway speed then accelerate, the RPM will first drop by 200 RPM, then. Most converters are set to lock up at least after reaching 25 mph and are in 3rd gear. Increases distance/ range. A lock-up torque converter has a built-in locking clutch mechanism. Are you looking to get the most out of your vehicle? If so, then XDP is the perfect solution for you. value village issaquah drop off hours Also, before anyone asks, I do have the tv cable set up properly using bowtie overdrives tv made easy system for the edelbrock 1406 carb. When I am getting up to speed on the highway the torque converter constantly locks and unlocks when trying to cruise. Lock-up eliminates the slippage, which reduces heat and improves fuel economy. Slipping reduces fuel economy and heat can damage the converter and the transmission. At a cost of about $600, it performs a lockup of the torque converter through manual operation of a dash switch, at any speed and in any gear between 2nd and 6th. log into xfinity hotspot Stainless headers and sheet metal intake built by the owner 2007 STS-V-Billet Precision 67mm turbo swap Modern torque converters use a lock-up clutch to reduce the energy losses within the coupling fluid by mechanically locking the turbine to the impeller Table based - K-factor (C and MPC formulations also exist). 48re torque converter lock up problem5 with a 48re that i just had rebuilt at a local trans shop and they put a mystery Suncoast valvebody in it and now my torque converter does not lock up at all. When the lockup torque converter is engaged, it causes the engine to lock to the transmission input shaft. I built the 4L60-E and programmed it. When I am getting up to speed on the highway the torque converter constantly locks and unlocks when trying to cruise. It acts as if it is hunting between gears; however, the transmission is in top gear.
On a 47RE, the lockup occurs generally at 47mph+ with OD on in 4th gear, and feels like a 5th shift. Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. Apr 19, 2008 · E4OD torque converter lockup going in/out. Then clean the pan thoroughly and reinstall the pan. When a converter locks, it lowers the RPMs and usually feels like going into another gear. It’s responsible for transmitting power from the engine to the transmission, allowing for smooth gear changes and efficient acceleration. Typically engines that produce more low-end torque will increase the stall speed. In the case of no converter lockup, we first need to road test the truck to make sure the computer is. When this happens, your torque converter has a higher effective stall speed Shuddering. Transmission whine, trembling, engine stalling at idle, or check engine light. My torque converter keeps coming in and out of lockup while driving in any gear and any speed. The solenoid gets energized and redirects fluid flow back, through the input shaft – this now increases pressure within the clutch area and causes it to engage with the torque converter’s front. Jan 16, 2024 · 3. Originally Posted by 1. Your app could stop working, the device itself can freeze, and it is even possible for the whole tabl. Install the new solenoid supplied in the torque convertor lockup kit. Trans has a shift kit). Lockup won't happen until the engine reaches. Be sure to have the car checked for vacuum leaks or other potential problems that can affect the idle of your engine before working on the torque converter. This supplys 12v to solenoid C in the transmission, bypassing the tranny computer in the process. Dec 1, 2018 · The added valves were “switch valves,” “lockup control valves” or with the three (3) path converters “bypass valves. Feb 28, 2009 · The ATF+ fluids are more "Slippery" and will allow the clutch to slip with out grabbing. craigslist portland farm and garden for sale by owner This issue should be investigated before replacing the solenoid, as it may be due to a lack of voltage reaching the. We'll show you both a quick and dirty way, and a precise, more complicated formula for converting a Celsius temperature to Fahrenheit (and vice versa). 157 posts · Joined 2020. If the brake switch input to the PCM indicates the brakes are on the TCC will release. Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. When I'm cruising down the road at whatever speed in whatever gear,my torque converter doesn't seem to be locking up. When this happens, your torque converter has a higher effective stall speed Shuddering. First thought it was a spark plug or misfiring but it’s the TCC lock up. When a converter locks, it lowers the RPMs and usually feels like going into another gear. It’s usually pretty detectable, as there will be a pool of fluid underneath your Trailblazer This is an automatic engagement solution for an early type A4LD 2 wire lock-up. So this would need to be checked before merely replacing the torque converter clutch solenoid. Eventually the speed of all three components is equaled out and direct drive is achieved. While on the flat for example, the tach may read 2500, then when transitioning to a slight grade, the tach will actually go down by about 200 RPM. lockup went cruising down the highway under light load, it does this when in overdrive & it seems to still do it whenD It does not shutter or vibrate when going. It’s happened to all of us – we misplace our phone and panic sets in. This may be due to high resistance in the torque converter. There is a gain of 40-50 horsepower at the rear wheels due to increased torque multiplication with our 9 ½ and 10½ lock-up models. The flow chart that I've seen for lockup converters says that there has to be a bunch of "yes" responses for the torque converter to lock up (speed over __, TPS at >____%, etc), what it sounds like is one of the sensors says "yes" then "no" then "yes" (meaning there maybe a break in the circuit somewhere). This was a slight uphill drive I did a video of one day, friends were asking what it was like to daily drive a stall converter, this is all I could come up with. It's a 118K mile 2018 5. You can rule this out by taping your brakes lightly when you have the chatter. 1999 to 2016 Super Duty - Torque Converter Lock Up - Does anyone know if and when our torque converters lock up while driving in overdrive? If they do, why the higher rpm when I turn overdrive off? Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. 687 posts · Joined 2006 350 lockup. Lockup won't happen until the engine reaches. embraco qd tsd2 near me I noticed when it locked the rpm hardly changed at all. 4,658 #3. Solution #1: Make sure the torque converter is fully seated on the input shaft of the. Everything was fine, until it wasn't. Not sure if its right. 9% of the time it seems like it doesn't lock up or doesn't lock correctly, i replaced my tps because it was under warranty, i also took it to the tranny shop and they ran a scanner on it and said all was fine, this has drived me insane and i don't have the money to fix it! Basically, in it's normally closed state the relay acts like a solid wire from the TCM to the TC lock solenoid, using pins 87a and 30. In a vehicle with an automatic transmission, the torque converter connects the prime mover to the automatic gear train, which then. Check it out: Mar 31, 2012 · understanding 4R100 Torque Converter Problems. Expert Advice On Improving Your Home. 3 posts · Joined 2010 I have a 2001 dodge cummins with 47re and my torque converter doesnt always lock up. Typically engines that produce more low-end torque will increase the stall speed. The flow chart that I've seen for lockup converters says that there has to be a bunch of "yes" responses for the torque converter to lock up (speed over __, TPS at >____%, etc), what it sounds like is one of the sensors says "yes" then "no" then "yes" (meaning there maybe a break in the circuit somewhere). - Torque converter clutch solenoid valve harness or connectors. Most converters are set to lock up at least after reaching 25 mph and are in 3rd gear. Also i did the old test with light throttle pressure you hit the brakes just enough to light the brakelights, and the RPM should jump a lil as the computer. Hi, I just bought a 2001 Dodge Ram 2500 4x4 5 The question I have is about the transmission torque converter lockup operation. However, if the engine is misfiring and is unable to turn over then the torque converter may be locking up.