I have the 9.25 on mine... but I do have the tow package so.

And to the OP you will want to get it calibrated also when you're done otherwise your speedo will be off a good bit. And like others said, have some one instal it for you.

 

now i'm curious as to what's under my truck...but i'm thinking 9.25 myself, for some reason...

 

could be... get out there and check!

 

yea i was guna have a buddy of mine do it at his shop, and thanks i found i have the 8.25 rearend, ill order them this weekend and hopefully ill have my superchips 3865 tomorrow

 

let us know how the superchips treats ya, i know that i've been looking into them for a while now

 

woohoo 8.25 cause i had to replace my seal when i broke it

 

i know the 1997s and 1998s only came with the 8.25 rear end. i know this because i have replaced three of them so far. it sucks but oh well. next time ill be putting the 9.25 in

 

Flash back to 2009!!