TORQUE CONVERTER CLUTCH (TCC) . That will probably run about $2000. 1987 - 1996 F150 & Larger F-Series Trucks - E4OD torque converter lockup going in/out - My torque converter lockup will sometimes go in & out of lockup went cruising. If you have upgraded your vehicle’s fuel system components, such as an upgraded fuel pump or new injectors, you might be facing a torque converter lock-up problem due to. as soon as i let offf the. Thanks Mark. The truck has been dropping in and out of lock up when climbing the smallest of hills. About 30 miles from home, I make a turn and bingo, engine stalls. You have to ground the purple with yellow stripe wire to lock the clutch. In my mind, using all the logic I can muster up, I can't think of a possible explanation that would say that locking the TC up at a much earlier speed does not damage the torque converter. Both of these are a rate at which the TCC applies. No, a torque converter cannot lock up an engine. The stator is called the middleman because it serves as the conduit that reverses transmission fluid and sends it back to a turbine impeller. I have not been able to retrieve any P030X for specific cylinders. Gears Slipping. It is more likely to happen when the engine is cold. The release can be verified by comparing engine RPM and Turbine RPM. It drives the front pump of the transmission. Torque converter lock-up is engaged through a solenoid mounted inside the transmission. now it rarely ever locks up. However, these two conditions can exist from other root causes. Release the 4 connector cover latch legs & remove the cover. at initial acceleration. However, it is an essential component of automatic transmissions. When this happens, your torque converter has a higher effective stall speed. Is there levels of converters do some have ratings were they only opperate correctly if you have. It will unlock automatically if your speed drops below about 30mph (50km. This gets fed from the EEC module, and controls the converter lock/unlock function. Replaced Torque Converter - same - did not fix problem. 1. It normally used to stay locked up over 45mph unless I really floored it. 1997 F-350 DRW 7. The stock converter lock points result in a harsh second shift. A scanner to verify what the trans temp is actually being read by the ECU would eliminate the transducer. Hey guys on my 2000 5. This lock-up device is important, because it helps provide maximum fuel economy for the vehicle when cruising. Torqshift 5R110 converter lock question. Want Answer 2. . I didnt realize that the torque converter was stuck in lock-up until I stopped and shifted the thing into reverse. Use of unsuitable transmission fluid. Reaction score. Poor Fuel Efficiency: One of the primary purposes of torque converter lockup is to improve fuel. Usually the torque converter lockup solenoid is at fault in your condition. Performed a ford test procedures for code 652. When driving normal with the switch on, it would shift OK, and then at about 45-50mph, the TC would lock up like normal and at about 35mph, let off the throttle, and the engine. Table of. You should hear a slight rise in engine RPM and see it on the tachometer. All new Motorcraft lv fluid as well each time. Limp mode is second gear, IIRC low / reverse accumulator circuit is what's also used to lock up torque converter. If it was unlocked the RPM would drop to 900 and your speed would remain the same. Thing is that it does lock up, it only locks up at certain speeds. Shuddering. My problem (s) started with a P0300 ODBII code (Random Missfire). I can cruise with it locked up at 55mph all day, anything above that it doesn't want to stay locked. That could be a problem with the brake light circuit, the throttle position, vehicle speed, or a few others. When driving at a lower speed, around 30 to 45 miles per hour, you may feel a shudder, as if you’re driving over bumps. The cost to replace a torque converter can be quite steep, depending on the repair shop. See more. Refuses to Go Into Gear. Shuddering. By way of fluid coupling, the torque converter transfers the power to the transmission without a clutch or clutch pedal. 4. 1997-2006 Expedition & Navigator - Torque Converter Circuit Electrical Problem code P0743 - My torque converter stays locked up when I come to a stop or slow down, which causes the. #1 · Nov 29, 2012. 1994. Some potential problems with the transmission of a vehicle could be related to the torque converter clutch solenoid. Mine stays locked almost all of the time and that is what you want, but don't let it hunt. A bad solenoid, a damaged wire to the solenoid, a leaking/missing seal on the input shaft, a stuck control valve in the pump body, or a bad torque converter. You will have no lockup, no OD, and limp mode. I have a Banks 6-Gun with PDA and love the power, but it does nothing to improve the shifting characteristics of. No peddle, put it up on stands to rebleed the brakes. And potentially work better than forcing the T/C to engage with a manual switch outside of the PCM control. When a torque converter locks up, it feels as if your car moved to a higher gear, even though you’re on the last gear already. 95 f150 4r70W converter stuck in lock up. The basic function of torque converters is to multiply torque so as to cope up with the reducing rotational speeds. You will want to maintain between 1,600 to 2,400 RPM to keep it in the proper torque range for towing and allow the TC to lock up. Replacing your torque converter can be a costly repair, depending on the make and model of your vehicle. If the torque converter is locked in the drive or idling gear and does not release the transmission, you most likely have a problem with the converter clutch. All 3 said the unit was fine that it was the converter. Burnt, dirty, or otherwise degraded transmission fluid can quickly cause problems within the torque converter clutch solenoid itself, due to fouling and sticking of the internal portion of the valve. The converter can be set to lock up in select gears or not lock up at all. Likes: 1. The friction material used in these converters. learned about the tv cable started messing with it, sometimes good sometimes bad, but always seemed to end up back to beginning. This solenoid usually locks up the torque convertor (which acts like a clutch in an automatic transmission) when you are driving at a certain speed, and unlocks it when you press the brake, and/or come to a stop. Re: Torque Converter clutch won't stay locked up Just wanted you all to know that it has been a week, two long highway trips, and a lot of other local driving. In street (meaning highway) driving, your converter would lockup since you are driving in overdrive, or last gear. 4R70W TC Stays Locked Up. 6. 4. If it does, then the problem is in the signals the PCM is getting. i change the alt. Of course it would be better yet to have a 2. had 2 weld on it to get the broken studs out. Here is a dyno graph of a car ran with a lock up, then a non lock up conveter tested the same day. You could jack rear wheels up four inches off the ground, put it in neutral. the pcm controls of operation of the clutch through the tcc solenoid. torque converter lockup solenoid has 13. Has to be from the same engine (318 OR 360). In this article, we will take a deeper look at the workings of the torque converter lockup and whether disabling one is worth the effort. This solenoid usually locks up the torque convertor (which acts like a clutch in an automatic transmission) when you are driving at a certain speed, and unlocks it when you press the brake, and/or come. Power is fine and the truck itself runs just fine. Need some help truck is a 17 f250 are these trucks knowing for having the torque converter lock up really hard under light acceleration. 2. ft of torque with a stock camshaft will produce a 2,000 rpm stall speed when a 2,000 stall speed converter is used. Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. When the car is braked to a stop, the clutch may become stuck in the locked up position, which will cause the engine to stall. 4. This keeps your F350’s engine from turning at the right RPM for any given speed, which can really hurt fuel economy. Lockup converters are torque converter types that contain a clutch. A fan (or more accurately the impeller) in the front of the converter supplies engine horsepower because it is attached to the flexplate via the front cover and ultimately to the crankshaft. You are browsing camaro6. 2. GM Hydramatic transmission. Torque Shudder is usually caused by the TC. The lockup clutch engages to supply a no slip condition inside the convertor to make a true 1:1 connection. I don't think the power loss after the 1-2 upshift is related to the fluid level if the tc's also locking up at that point; it's probably due to the severe RPM drop snuffing out the turbo. Gear Ratio 3. Matt tuned my tranny so that it draws out 3rd just a little bit further to avoid the rpm drop that happens into OD. If the face is not blued, then it still be the converter, or the torque converter clutch control valve, or the seals on the input shaft. transmission is locked up acts like transmission is locked between gears - Kia Sportage question. If values are added to each table, that would be like adding fuel. Not true. For WOT Launches and acceleration to 70+ mph, the TCC can't lock until part-way through 3rd gear. Remove it. Your car's automatic transmission has a torque converter. Now My question is a little different than your answer. 91-95 (exc 3. This is the trick. When the converter was locked, the temps would dip to about 125-135 (outside temps were about 45*F). Slippage, overheating,. FYI took it to 3 separate trans shops. 2 for E10. Location. It feels like the transmission has 5 or 6 gears. . Dragging Clutch. problem i am having is when driving at like 40 mph, the torque converter will lock, unlock, lock, unlock. If it doesn't light up there may be a trans code in memory that you don't know about. Today's Posts; Member List; Calendar; Forum; Non-Engine Specific; Transmissions; If this is your first visit, be sure to check out the FAQ by clicking the link above. /OD. The PCM in most '99-up PSDs will lock the torque converter at about 37 MPH when accelerating, and unlock it at about 37 MPH when slowing down. 1. Basically what is happens is at idle rpm's the pump is not able make 100% of the pressure it is calibrated to. 1 diameter). The transmission temps would also skyrocket on the highway. 3. The VSS on the differential will interfere with the speedometer, but not torque converter lockup. The stator is called the middleman. 1 diameter). This keeps your Caravan’s engine from turning at the right RPM for any given speed, which can really hurt fuel economy. It's the common "torque converter lock-up" problem - a shudder like driving over rumble strips or rough road as the torque converter shudders into lock-up at 45-50 mph. No wiring, different converter, locked all the time, (not normal). Yes, it feels like another shift and the engine sounds like it bogs down when it locks up. Could certainly be misfires from worn out spark plugs, but could be faulty injectors also, besides the transmission possibilities. When this happens, your torque converter has a higher effective stall speed. Typically, early applications had a Torque Converter Clutch (TCC) that was either applied (on) or released (off). ”. Mark. a couple of VSS sensors. Posts: 1,360. Check transmission temperature. What happens when torque converter stays locked up? So, there are three potential ways a torque converter lockup clutch can fail. Slipping reduces fuel economy and heat can damage the converter and the transmission. worked fine. An engine producing 230-lbs. Breakdown or Damage of Core Components. Mark said that the torque converter isn't my problem. I took it to a transmission shop and they put it on their scan tool. Bimmerforums is the preferred online BMW Forum and community for BMW owners. The purple with yellow stripe wire could be shorted to any grounded part of the truck and that would keep the clutch on. 3. Want Answer 1. What happens when torque converter stays locked up? It is possible for a torque converter lockup clutch to fail in several ways. People use a torque converter lockup because it provides fuel economy. MPG numbers were great; they were just a little higher when the converter would lock. While driving a constant 65 mph, on level ground, the engine RPMs will go from 1700 to 2000 and then back again. . The Basics. The vacuum switch will ensure there is no lock-up for gears 1 and 2 at speeds lower than the set pressure during hard acceleration. Turning the overdrive off locks it out of 5th gear (less than 1:1 gearing) and into a maximum of 4th gear, which should be a 1:1 ratio, hence the higher RPMs. Torque converters use a lock up clutch to create a true 1:1 connection between the engine and the wheels. 3L engines such as yours.