ThirtyFive 21

Hey all we have a M1097A2 with a tranny problem. It was inducted for the transmission not shifting ok no problem swap the trans and go for a test drive it doesnt shift stays in one gear. So we start troubleshooting, pulling codes 59, 73, 81, 82. Swap out the TCM and no codes come up. Put it in high lock one, gear then low lock it changes one gear. Any help would be greatly appreciated.

Do you have a tech 1 or a tran x 2000?

No we had the supershifter but it fried on the last truck we had. So all were working with now is the toggle switch. Were trying to ecr a tran x from another unit once that happens ill post results.

Check to see that the blue chip in the new tcm matches the one in the old one. I have seen a few where that ended up being the problem. Or a bad wire or connection at the j2 connector

Yeah i had them check the blue chip i remember i've had a problem with that before but not the case now. We'll check j2 next

Update: Now were messing with the TPS. We did the adjustment last night (so tedious to get the voltage to be exact) and today we will test drive and see what happens. We checked J2 everything seemed fine.

Sorry I never posted the end result it was just the TPS being out of spec we adjusted it and everything was normal.

we had the same problem a while back.. sorry i didnt check been kinda busy.. there is an AM general cheat cheat manual that diagnoses you to check and verify exactly that.. ill see if i can post up a pic.. pm me if i forget ...

by the way... dont clear the codes if you havent fixed it.. all it does makes you start from scratch.. the codes give you a great place to start.. and sometimes the codes stay stored in there and need to be cleared... such as mtvr codes... (QC should be clearing these)