Posted by JDEM on April 26, 2017 at 06:56:25 from (70.194.21.186):
I am at near the "end of my rope" with the trans in my truck. My main question is this. Truck is a 1994 4WD F250 turbo-diesel 7.3 IDI with an E40D trans. It there a way to unhook the lock-up torque-converter when cold? Note I already tried the most obvious approach with a simple on-off switch and no good. It winds up putting the trans into "default mode" and then have to get out my scanner and clear the codes before the trans will work right again.
I have had many issues with the trans over the years. I finally bought a remanufactured complete trans and installed it last year. I gave up on the old one. With the old trans - after a rebuild - I stopped at a red light. Then tried to go and nothing. Just a little clunk and then no-go. Ended up a solid steel shaft had snapped right in two. After that - I was leery of metal fatigue with the old trans and bought a complete replacement.
The problem with the new trans is the converter. When temps are lower then 60 F and at first cold start - the first time the converter locks - it stays locked. It nearly pushed me through a red-light the first time it happened. Once it warms up it is fine and I can drive it all day with no issues. Next morning if it is cool out - it happens all over again. Trans is still under warranty but that only covers parts, not labor. I assume this has a defective converter and the right fix is to tear it all apart and change it. I just don't want to. If I could just find a way to turn the converter "off" until warm - it would be fine.
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