...After a morning startup when the transmission fluid was cold, it seemed like the torque converter was "slipping" (not locking up) in 3rd and 4th gear at low rpm under a load.
The TC won't lock until the temp of the engine comes up; IDK about the Transmission temperature sensor.
I'm having the same issue, sudden onset of symptoms.
I noticed these issues the week after Seafoaming.
I've done some early datalogging; the o2 sensors are switching, but may be bad. I'll swap them next.
3rd and 4th won't lock the TC, and 3rd seems to slip wildly at times. Could be TC, IDK.
Running thru the gears like a 1/4 mile start works perfectly, and locks the tc.
This tranny is jmodded, and has the brown 1-2 top spring, and no 2-3 spring.
It was almost 1/2 qt low hot, but still on the stick.
It has a Ddog TC.
I swapped the wires and plugs today; it ran much better, but still shifts strange.
I had a rich code on both banks, but I believe that's my tune. I have reloaded the stock tune, and the issue remains.
I'm wondering if this is an eec issue; I've heard of such things.
Is there any reason I can't pull the 96 eec out of my project car, and put it in here to see if it's the problem?
Could my harness repin, or a harness problem cause this?
It grabs 2nd good with my new "stock tune with tranny tune"; the original stock tune almost never locked the tranny anyway, that I could tell.
One last thing: In manual 2nd, it has engine braking, and the TC is locked solid; it will burn rubber in 2nd going from decel to accel. WTF??
I don't think this is the TC, since it works so well in 2nd. Did I smoke a clutch?
Any thoughts are welcome, as well as tips on what all to datalog.