Torque Converter Lockup Wot

August 25, 2021 Post a Comment

The TCC works fine in the transmission the ECU just isnt allowing it to lockup if the engine is at WOT prior to conditions being met. Torque converter locking up in 3rd WOT.

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Torque converter lockup wot. Ive got an edge insight and have it showing me the gear torque converter lock. Jump to Latest Follow 1 - 5 of 5 Posts. It can stay locked up stalling the engine when the car is braked to a stop.

Any benefit to a WOT lock-up on torque converter. It feels like an upshift. Also The TCU is programmed to force torque convertor lockup when engine RPMSs are above a certain point not sure exactly what RPM though and youre at wide open throttle WOT.

Youll be suprised especially the people who think they want to lock the converter in the bottom of 3rd. 1st gear - TCC does not apply 2nd gear - TCC will apply at 31 mph at Wide Open Throttle 100 3rd gear - TCC will apply at 41 mph at 75 throttle and above 4th gear - TCC will apply at 50 mph between 66 and 80 throttle and 56 mph at 88 throttle and above. Whenever I am WOT in 3rd gear around 80-90 mph at about 4500 rpms or so the torque converter locks up and the RPMs drop to about 4100 and they start climbing from there.

The Working Of Lock Up Torque Converters. At approximately 35 mph connect the other end of the test light or jumper wire to terminal F at the ALDL. With a good converter its usually toward the end of the gear.

I thought that the 2-3 shift was just lock-up in 2nd as it isnt in 3rd that long and Ive never stretched mine out hard enough for a WOT 4-5 shift. Or it can slip when engaged allowing engine speed surges at a constant vehicle speed. You may also have a look at maintenance tips when better transmission speeds are all that you desire and how does a lockup torque converter work.

Guest Discussion Starter 1 Jan 26 2007. Locking the converter will infact give you softer shifts because you have effectively eliminated the torque multiplication of the converter hence at the shift point your torque will actually halve. And sometimes will miss a lockup if the input vs output speed is more than 800 rpm IIRC.

Yes but wont lockup in 1st. What are Lock Up Torque Converters. Not good to hit the fuel cut for the engine 7100rpms and shift when the transmision input shaft is only actually spinning at maybe 6400rpms.

The lockup clutch or TCC is applied as follows. A lockup torque converter is used since it offers fuel economy enabling you to use fuel minimally while on that joy ride. Graph it by MPH not RPM and where the two HP not torque lines cross is the speed where you want to lock the converter.

The engagement of this clutch causes the engine to lock to the transmission input shaft thereby leading to a direct 11 drive ratio. Hey guys is there any benefit to a WOT lock-up or is there certain mods that are needed to take advantage of this besides an aftermarket converter. I went back and looked at a log and pulled up a TCM tune in EFILIVE and the torque converter actually locks during the 2-3 shift under WOT so that it is locked for 3rd gear.

Besides the torque converter is your friend it multiplies torque output in exchange for higher engine RPM so only lock up when you know you dont need much oomph. It can never lock up which shows up as an increase in fuel consumption and radiator temperature. The EEC will actually lock your converter at WOT.

May Gods grace bless you in the Lord Jesus Christ. History of Lockup Converters. There are basically three ways a torque converter lockup clutch can fail.

Whether the TC locks up or not follow the troubleshooting tree to the next step cooler line surge test. The innovative lock up system connects the impeller with the turbine transforming the torque converter into an absolute mechanical coupling. Under light acceleration when the trucks up to temp the converter wont lock.

And it feels like the truck just stops pulling as hard at that point. What Is a Lockup Torque Converter. The torque converter should Lock-up.

The result of an implanted lock up mechanism includes improvement in gliding transmission power and less waste heat. Lockups are also known as torque converter clutches as they literally clutch the two halves of the converter and set them at a fixed speed or power level. The WOT Unlock TPS value allowed has been increased from 1000 to 1050.

If it didnt you would out race the transmision to the fuel cut. This allows for the torque converter clutch to be locked at WOT by allowing a value higher than 1000. The early TCM OSs if you are on the highway and go to pass floor it downshifts to 4th and simualtaniously unlocks the TC then does that MOST ANNOYING THING EVER IN THE WHOLE DAMN ALLISON TCM waits until tcc slip rpm is below a certain value before allowing the converter to relock then relocks the converter then when the 4-5 WOT shiftpoint is reached shifts back into 5th.

Videos you watch may be added to the TVs watch history and influence TV recommendations. Torque converters lockup generally in the 3500-5500rpm range depending on car operating conditions and programer whim. The converter remains locked and when you compare engine RPM to output shaft rpm they are within 1 at full power.

Here is a example on a stockish auto. It will show that the converter is locked once Im over 55mph but if I let off the throttle the lock symbol goes away even though Im. Lockup torque converters are a type of converter that has a clutch.

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