5 lug to 6 lug 14 bolt with GMT900 20's

[bluex]

Ya it exists, my truck is a G80 with 3.73's an 6 lug since it's 4x4. Just check the glove box on any 4x4 for the code GT4 that's 3.73...

 

[oohunter04oo]

Well G80's (factory LSD) are known for exploding. I have one in my truck, with 3.73's. just remember if you put a rearend out of a 4x4 is going to be 3" wider than your 2wd rearend. So you'll need spacers up front. Unless you have drop spindles and they make you track width wider. You could find a light duty 2500 and take the rearend out of it. It'll be a 14 bolt, but most all of the 2wds are open diffs with 3.42's. and also remember that the backspacing on gmt900 wheels are different than gmt400s by 1.5" so if you get the 4x4 rearend and gmt900 wheels they will be right where you stock width is. Hope this helps.

 

[oohunter04oo]

Ya it exists, my truck is a G80 with 3.73's an 6 lug since it's 4x4. Just check the glove box on any 4x4 for the code GT4 that's 3.73...

Correct... Here ya go.


GU4=3.08
GU5=3.23
GU6=3.42
GT4=3.73
GT5=4.10
HC4=4.56

G80 - locking differential

 

[johnny1]

Thanks guy all this info will help me out, im going to pick n pull this weekend n find me a rearend n some rotors n hopefully my ol lady will surprise me w some texas edition 20" jajajaja hope to b running in the mid to low 9s in an 1/8 with the 3.73s. Will post pix of swap soon thanks