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I learned a lot today, I made a friend at an Allison transmission repair shop. I was able to confirm that my transmission has a TID3 harness. WTEC 2 transmission controllers, as far as I know, are only compatible with TID1 harnesses. The only difference between these harnesses is which component...

Sorry if I was unclear, that’s the issue I think I’m having. I think the trans itself has the wrong harness in it. The valve-body harness.

I have chased the harness all the way from the bulkhead connector to the trans. I am able to test and get good Ohms for each solenoid at the bulkhead connector and also tested that none of them are grounding out. I’ve isolated and tested all of the solenoid circuit wires from the bulkhead...

Well I just got my trans controller back from rebuild and it took care of most of my error codes. I’m still left with two, 44 13 and 24 23 I’ve tested all the circuits and can’t seem to find anything wrong, code 4413 is, solenoid short to ground and I’m quite positive none of the solenoids are...

Awesome!!! I had searched through the TM section and didn’t find this. This is exactly what I need to get this harness repaired and tested. Thanks a ton guys!! Casey

Thanks for the help fellas, where can one find an allison manual with the proper specs to checking these circuits? Also, are these controller generally reliable or is it a good idea to have a spare?

Hello, I’ve been stalking and lurking for a while now and finally have a reason to post and ask. I just acquired a 1996 1078 with transmission issues. I’m hoping I can sort them out before having to drop the transmission. Today I discovered some corrosion in the lower connector for the control...