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Well she's back together and shifting perfectly. The shop looked for anything that could have caused that misalignment and failure but couldn't pinpoint a smoking gun. It needed a rear main seal...

Thanks Robert,

Shop inspected for arcing and was pretty familiar with how to inspect for that issue and did not see any evidence of arcing anywhere in the unit. I believe the TC is damaged all...

Bad ground to the harness? or externally? I know the harness that is in there is new but recently new.

Here is what he found:
145012
145013

That torque converter was installed about 6 months ago. Don't know if the bearing was replaced at the time, id have to check my invoice.

Shop says...

Well the builder got into it today and pulled the valve body, it already had the new afl valve installed in the reman'd unit.
On to find where else it could be loosing pressure. Tomorrow they are...

Thanks Robert,

I'll shoot this over their way and get on the schedule. Can't thank you enough for jumping in here and sticking with me on this.

Chad

Wow, thanks! I follow, so that gives me a lot to think about. We're driving to FL today and we did some logging. Interesting that when the trans was in forth gear the line pressure registered as...

I appreciate your help, I'm not trying to get a particular answer really. Just don't want to throw money at the problem. I just don't get a few things that I asked and still am curious. Why is the...

Had to run to the store so I pulled another file. I left the TCC PWM engage the whole trip except for a few times on a downhill and you'll see the RPMs jump. What I see here is that when the TPS is...

I have to run out, I'll go back on the highway and will command it on when it's slipping. You'll see it stop right away.

its the other file labeled tccpwm.

Thanks for sticking with me

lol, I guess that's fair, I certainly don't know where that valve body came from but I'm sure I can cash in the warranty.

One other question, When I command the TCC PWM "on" from here

144260...

This is a new Valve Body, bought from TranStar in Jun 2023. Is is possible the TCC PWM Solenoid is defective when not fully engaged?

In that screen shot, it shows the current Trans Gear as 4. ...

Thanks Robert,

Here are three files.

The new tune, standard GM tune with one adjustment for tiresize. Very minor
Next file (032124731.hpl), highway drive. Each time you see the RPM climb...

Tonight I flashed several test files including RDF1's file, none changed anything much. I maxed out the Duty Cycles to 100/900, made major adjustments to the Apply/Release Tables. Did these all...

Thanks for the replies so far, it's given me some things to work out and a few more ideas.

Tonight I drove it with the following manually commanded on

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While I had the TCC PWM...

Searched in the add channel window and there is nothing there, did the keystroke above and nothing happened. What are 5682 and 83 called?

Thanks Alvin,

I checked all of my fuses and only have one related to brakes and none with TCC in the name. The brake fuse was good. On this model, I believe the brake switch itself has a lead...

Thanks RDF1,

Thanks, couple of clarifications and I can run this after work. When the TCC slips in that log file, it is still commanded as locked and shows locked with a TCC Slip of 115%. I...

I went out and drove it and logged the drive. I am attaching the tune and the log from the drive. A few minutes into the drive once I hit 70 you'll see the RPM jumping from ~2000 to ~3000. TCC...

First time using the HP Tuner and have done some homework so will try to explain what is happening and what I know.

Trans is rebuilt and all parts have been checked out by two transmission shops. ...