4l80 swap questions....

so i got the 6.0 into my truck and i need to do a tranny now. everyone has told me not to put the 4l60e back into it and swap it for the 4l80e. i have a 1999 gmc sierra reg cab short bed 4x4. so im not sure on what to do with the transfer case... do i get one from 4l80e as well?? and if its longer ill need driveshafts to. so wont this setup cost alot most then just getting a built 4l60e?? just trying to figure out what to do. also i noticed on my 5.3 there was transmission alignment pins and on the 6.0 there is not. is there a reason??? THANKS GUYS!!!!

The 6.0 has pins as well they prob just stayed in the trams when it was pulled off motor. Just knock u pins outa 5.3 and install them in the 6.0. Also. The 80e t-case has input for 80-e. u will have to install input for 80 t case in ur 6o t-case or just get a 80 t case also the 80e is longer so yes u will prob have to get front shaft outa a 2500 and have rear shortened

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Originally Posted by LQ9_Z71

The 6.0 has pins as well they prob just stayed in the trams when it was pulled off motor. Just knock u pins outa 5.3 and install them in the 6.0. Also. The 80e t-case has input for 80-e. u will have to install input for 80 t case in ur 6o t-case or just get a 80 t case also the 80e is longer so yes u will prob have to get front shaft outa a 2500 and have rear shortened

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Yes sir, or there's a guy that makes an adapter for the 60e t-case so the 80e output shaft fits.

ok thanks guys. the setup i had befor had 290,000 miles on it. so im thinking i might just find a transfer outa a 2500 as well as the tranny. do you know what year tranny and transfer with work in my truck??i found some from a 98 but im not sure if the old style works in the newer style trucks