asb2106

iTrader: (2)

So i just completed my build, everything went together quite smoothly, trans was not removed during this swap.

350 miles before the engine swap I had the 60e rebuild and a new stock converter put in.

it ran great, shifted fantastic, no issues.

So I sent out the pcm for a flash for the engine swap and the 2 bar OS.

The engine runs good, however its not running right. The truck cannot get out of its own way. it feels to be in some sort of limp mode. from a stop, if i put it in 2 and floor it, after about 40 seconds I get into boost and it starts to move alittle..

Hooked up my modis and got a plethora of electronic trans codes - p0740,p0753,p0758,p0785,p1637,p1680.

The trans was never unplugged from when it worked..

could it be fuses? something in the tune? at this link I have all my hptuners files, config, logs and the most recent tune. ( i cant find a bad fuse anywhere?)

any help would be REALLY appreciated Thanks all

build thread - https://ls1tech.com/forums/forced-in...0ld-twins.html

Blackpanther99

iTrader: (8)

Thats a heavy truck for the 60e bro

asb2106

iTrader: (2)

yah bro for sure. it came with a 60.. had a 174k on the first one, and it wasnt babied.

and i got an 80 if needed, but I decided to run this out.. thanks for your waste of post tho; bro

mrvedit

With that many codes it is almost certain that the trans is not getting +12V, which typically is supplied through a fuse.
The sluggishness is due to limp mode - with no +12 to the trans, both shift solenoids are OFF and the trans stays in 3rd gear.

Here is a recent similar thread that should point you in the right direction:
https://ls1tech.com/forums/automatic...-no-shift.html

asb2106

iTrader: (2)

thx, will report back