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Getting on the freeway passing a very slow car, truck downshifts at probably 3/4 throttle and 45 mph, accelerates for 2-3 seconds like normal, then BOOM, truck lurches once and revs instantly with no gears forward or reverse.
Anytime it runs it makes a whirring/whining sound underneath.
No leaks or visible damage.
Will not hold itself from rolling in any gear(except park of course).
It has been doing the flashing OD light intermittently, but not very frequently. Maybe once a month or 6 weeks. Easily reset by restarting the truck.
I do know it is not original trans, but don't know the history. I have put 31,000 miles on it, truck has 221,000.
I do not tow very often with it. One time towed about 12,000 lbs., another about 7,000lbs.
Any ideas what I'm in for?
Is this a common mode of failure for the E4OD?
You're in for a new transmission. If you had read the codes back when the light started flashing it's possible that this might have been a cheap fix. It's all done now, rebuild or replace it.
Thanks for the quick reply, Mark. I did pull the codes awhile back, but reading here, I chalked it up to a loose connection at the tranny as it only did it when it rained heavily. The code was for the FIPL voltage too low. I verified that it was and reset to ~1.2v closed and it never acted up since.
I will probably find a used one to put in and sell the truck as that was what was going to happen soon anyway. I am going to buy a 4WD and swap in a Cummins I have been holding on to for a while.
If I may ask, in light of your credentials, what are the things that should be done to reasonably beef up these transmissions for 4WD and moderate performance use? No racing or extreme towing, just hauling around itself and occasionally towing things, but with a slightly turned up Cummins.
ETA: The other codes that it displayed didn't necessarily make sense to me. In the book I seem to remember the codes being for EGR or O2 sensors. Something completely unrelated to a diesel. I tried to match them to the three digit codes in the book to no avail. Could've been a warning to look closer but I had no other reason to suspect anything was wrong.
I chalked it up to a loose connection at the tranny as it only did it when it rained heavily. The code was for the FIPL voltage too low.
The FIPL is on top of the engine, not on the transmission.
Originally Posted by 119er
If I may ask, in light of your credentials, what are the things that should be done to reasonably beef up these transmissions for 4WD and moderate performance use? No racing or extreme towing, just hauling around itself and occasionally towing things, but with a slightly turned up Cummins.
A better converter for one. The internals can be swapped for 4R100 parts, which are stronger.
The FIPL is on top of the engine, not on the transmission.
Sorry, I wasn't clear. The OD light flashing only happened when it rained heavily.
The only code that made any sense was the FIPL sensor reading low, which is adjusted via bracket on inj. pump and back probing.
These suckers are kinda hard to find around here and I live in a huge city with a lot of trucks.
Finally got around to fixing this truck. Turns out that the input shaft splines stripped off in the torque converter. It is a 93 truck, but the transmission had the 95-up short shaft. I tried a longer 14-1/8" shaft but it wouldn't let the converter seat. So back in with a new converter and short shaft and it is back on the road.
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