Torque converter locking and unlocking? - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 12-24-2012, 05:59 AM Thread Starter Rookie
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Torque converter locking and unlocking?

For some time now my 4r100 transmission has been acting weird. If I'm driving around in overdrive at highway speeds and give my truck a decent amount of gas the torque converter seems to unlock and lock several times. It'll build up the revs a couple hundred RPMs for 1 second and then drop back to where it was...then it'll do it 5-6 times and then not to it for the duration of my drive.

If I shut my truck off, turn it on, it'll do it all over again. But once it stops doing it, it'll be fine for regardless of how many miles I drive. Otherwise, the transmission is fine. I towed a 12k lb trailer 75MPH the other day and everything was fine.

I recently got a DP-tuner chip but the the transmission had always been a little weird even before the DP-tuner chip.


2000 F250 7.3L Powerstroke -4x4

Automatic Transmission
Mile Marker selectable hubs
4" stainless exhaust with 3.5 down pipe
Truetrac limited slip in the rear
Boss 8'2" Poly VXT Plow
DP-Tuner F5 - Stock, 80hp Econo, 100hp performance, 60hp tow
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post #2 of 2 Old 05-28-2013, 04:23 PM
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You ever figure out your issue? I have something similar going on.

2001 - 14" OUO 525 - 38x15.5x20 Toyo & 20x12 Weld Cheyenne's. Hybrids, 38R, BTS, Spearco, Terminators..

Quote of the Day:
Originally Posted by Mannysouza View Post
You will get some axle wrap with a heavy trailer, I can feel it when towing my gooseneck with some heavy equipment. My Deavers will wrap enough to make the tires rub the front of the rear fender well if I give it too much throttle on aceleration.
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