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Send it off to https://www.transmissioninstruments.com/ and get it reconditioned.

Correct. PM sent

Yes, that was the 1st major repair after replacing the chassis harness during diagnostics. It ohm'd good but the code I'm getting now is "no continuity circuit A" - different than the original code.

No it's still a lingering issue. I purchased a new inner cab cable (from TCM to hump connector) and it didn't solve the problem. At this point I've touched every part from the TCM to solenoid with continuity and still have the code. TCM checked out good from an Allison authorized dealer. I'm at...

I'll have to get that info. The truck was cold (not warmed up) and ambient temp outside was 99F. The first chart in my first post shows the ohms per solenoid circuit but they don't match up to the spec per temp the TM shows. This temp to resistance doesn't match up either. I measured each...

Well the big issue is solved only for another to appear. Code 45 12 - "Open Circuit A". This code is a halt operations code so the transmission will not engage in any gear until solved. I'm at wits end chasing this germlin so maybe someone will think of something. I followed the TM and in the...

Got back to this truck today and dropped the control valve module. Had to drop the front shaft to get it out right despite the TM not saying to do so. Solenoid A is indeed reading low ohms so parts are on order. I took the opportunity to clean out the pan and replace the filters. It's nice to...

How long did it take you to drop the pan? Did you have to drop the front drive line too or were you able to work around it?

Doing some google-fu I found some info on the 3070 transmission solenoid body. "If 2.5-5.0 ohms resistance is not present, solenoid is faulty. If 2.5-5.0 ohms resistance is present, transmission ECU is faulty." This makes me still ask why Table 2-35 doesn't comply with this range and temperatures.

The 1078 I recently acquired runs but wont go into gear. The PBC (push button controller - Wtec3) is giving me an active code for 46 27 - Overcurrent, A-High Solenoid Circuit. Clearing the code does not work, the condition is active and preventing engagement. The relays in the PDP click when...