k...been doing some more research...and It seems to be Eaton Detriot Tru Trac or the Eaton LSD....so i got that down

Now at the risk of sounding like a retard....I already has 3:73..but thinking of doing 4.10's....if i choose 3:73 will I have to buy another gear set? can I reuse stock stuff??

any anbody know where I can find part #'s?

 

GM 10 bolt, 8.5/8.6, 30 spline differential. You will have to have a new ring and pinion if you change gears, not if you keep the 3.73's. I recommend AAM (OEM) gears. You could probably re-use your carrier and pinion bearings and races... if you can get them off without damaging them. I recommend new ones. I recommend new bolts for the ring gear. I also recommend having a professional install and setup your rear end.

The Detroit True-Trac part # is 913A48L

 

I thought people were gettin better gas mileage with the 4.10's

 

I love my Eaton LSD with 4.56 gears...

 

4.10 if you do more town driving. 3.73 if you do more highway.

The true trac instead of having clutches engage the positive traction it has gears. I can throw my *** end around at will. But if I dont want to its all good and is just as DD as my G-80 was.

 

i did my eaton lsd and motive 4.10's install @ 25k mi.
first gear set and differential ive ever set up.

the combo now has 46k mi. on it and never had one problem or complaint.
pulls consistent 1.75 short times and a best of 1.73

 

My vote is for the Eaton LSD.

 

Im thinking some tru trac..and maybe 4:10's..not sure...I do highway a fair bit...THe truck will only see less than 5000km a year...its alreayd got 3:73's...so its not like I have a slouch gear in it..works good.

Thnks..gonna probably ahve my mechanic do it cause I dont know how to set it up properly etc