2004 Duramax - tranny slips in 85hp mode

[str1249]

I have loaded all the different programs into my truck over time (I bought this unit in '05), and it has worked great in all modes up until recently.
Any time I use the 85hp program, the tranny slips like crazy, in "regular", "tow" or "no OD" mode. Any suggetions?
Is it possible some of the program in 85hp got damaged?
Is it possible to get the unit checked/reprogrammed?

[rydnhi4x4]

Is the tranny slipping or is it going into limp mode?

[FPSeth]

We have had the same issue on a customer's truck (2004 LB7) after the predator is installed on Towing, and he is towing anything (even an empty trailer), the tranny shifts irregularly and slips between gears. Take the program out and everything seems normal.

[mikel]

Are you letting it go through the relearn process?

[Maxan]

I Have a Duramax LLY with Predator tuner at 85 HP and my transmission send P0735 and others at ecm.
Someone ask my problem?

[Tigger]

I just got my predator back yesterday and loaded the 85 hp program. I was driving it back to work, about 180 miles and when I was almost there, I went to pass a truck. When I got on it, it limped. I got the P0700 code, and after I cleared it a few times it went away. But from what I can tell from other guys I know, it will limp alot easier now that it has happened.

I backed down to the 65 hp tune now in hopes that it will help.

[mikel]

how many miles on the truck?

[Tigger]

My truck has 110k on it.

[mikel]

may want to look into freshening the tranny, new fluid/filter.

[Maxan]

may want to look into freshening the tranny, new fluid/filter.

Transmission oil and 2 filter are changed, clutch test and oil pressure test and its all OK. Silverado 2004.5, Predator U7185, rev.2.02. Excuse my english!