Thats OK, each truck OS is slightly to majorly different. Wolfys truck has a ton more options compared to our GMT800 trucks. Its nuts.

Also, I hope you didn't license the file I posted. There is no need. You can just segment swap.

 

Yukon you have file for... Im about to send you christine's

 

Well I did.. and still having issues .. Speedo still not right and no codes but Abs and brake light turning on.. and off when I start it..

 

I was reading others issues with this swap and found another person, who is having the same problem with the ABS and brake light coming on as well.

#5
chvybeatsford
Trader Rating: 0
Teching In

Join Date: Oct 2012
Posts: 10
Default
OK... Thanks all. But weird thing .. I made this post while sitting in parking lot waiting on tuner to return.
1rst run with me it did it.. Skipped third and would surge rpm.
2end run after returning to shop it did just like it was supposed to .
3rd run after getting back checking level of fluid same thing as 1.
4 and 5th run it was fine. So i left it there till tonight when i can go get it. Hopefully it wont do it.
We may be thinking assembly lube was blocking valve body and took a good running to help flush it out.

Any weird thing is that now my abs a brake light are on. Maybe coincidence..i duno.. will report back.
chvybeatsford is offline Report Post

 

OK today was at the tranmission shop and they say everything seem to be in working order. So my problems must be in the tune! its holding gears longer then it should. and burning a lot of gas. when you drive it and press anything other than very very lightly on the gas it will not change gear til you lift up on the gas pedal ..

 

Well I see I get no help cause there were a few on here with the same problem and they got no reply either,, But I think it has to do with the VSS even I replaced the sensor, cause others have had the same problem after a rebuild... I was thinking it was in the tune before that.

 

When you swapped the 4wd Output Carrier to the 2wd trans....Did you make sure it had a OSS Reluctor Wheel?? Without the Reluctor....The OSS will halfass read off the parking pawl lugs then cutout at higher speeds. Remove the OSS sensor & look through the hole....You will see if the Reluctor is present.

Top is a 4wd Output Carrier, Bottom is a 2wd with the Reluctor. If this is your issue, Sonnax sells Reluctors separately.

I bet the transmission shop forgot that in mines too!

 

You can remove a vss and stick a finger in to feel for the edges.