Monte4ever

iTrader: (2)

Been using 4L80e for years without a problem. I changed to a Flex Fuel 2bar OS (12216125) and did the 4L80e segment swap for the OS but now the trans will not shift. When I put it in gear for the first time it will shift normally, then after coming to a complete stop it will not go to first and seems to be stuck in second. When I command any gear with the scanner they all engage while moving. I don't have a log of the problem but any suggestion of what's going on is appreciated.

joecar

Have you looked at the PT mph shift tables and the throttle kickdown tables...?

SlasherVRGR

iTrader: (1)

I'd be sure to copy and paste all of the previous trans shift pressures and variables from the old tune to the new one.

Monte4ever

iTrader: (2)

UPDATE The file I used for the segment swap was bad. Hptuners sent me a good file and all is well. Now I just gotta fix my converter lockup issues. I'm sure that's a tune related issue thou.