pozesd99'

iTrader: (3)

so we just installed the tranny but it will drive but not shift out of 1st....
what could cause it? its an automatic valve body tranny

pozesd99'

iTrader: (3)

could it be that the tension on the spring is not letting hydrollic pressure though?

performabuilt

iTrader: (25)

Have you reprogrammed the PCM to run a 4l80e? Or verified that shifts are even being commanded ?

pozesd99'

iTrader: (3)

the tuner said that he did do that....

tptransmission

What are you using for transmission controls?

red83

iTrader: (64)

what was it tuned with? do you have a tune file? (i can only possibly help if its efilive) what is it in and what harness? how do you have it wired?.etc...etc..etc......

nahasapeemapetalon

iTrader: (9)

Are you sure it is in 1st? Verify that it is, i think its in 2nd. It automatically faults into 2nd gear in a limp home mode. I had this when first intalled, I had a few issues...
First...I didnt have the proper bin file, i took the bin file information i was sent and loaded it to my M6 file (wrong) you have to use the new bin file and load any motor or other info onto the new file.
Also i didnt have both speed sensors wired up on the side of the tranny, not really related to this i dont think but something to check.