12 bolt question

[Kain]

how do you tell if ts a 8.75 or 8.5 ring gear. it is a 77 blazer chassy
need to get bearing and seal kit to install. what tools am i going to need special
tools i will need, i have a bearing and race driver installer coming in also a dial indicator with magnetic base.
I have never messed with a rear end beside changing fluid or brakes.

 

[sweetk30]

8.5 = 10 bolt

8.75 = 12 bolt

FYI : there is car and truck 12 bolt . get the correct parts .

better read up on setting gears . its a slow mans game to get it done right . not just a wam bam call it good.

 

[Kain]

ya ive watched 7 vids and i have 2 books on it so ill spend my free time reading

 

[Kain]

also its a truck 12 bolt truck where should i get the rebuild kit from? i don't want to do this twice.

 

[ccarley]

I got my bearing & seal kit from Jeg's; from what I remember it was like $80, including shims, gasket, crush sleeve, gear marking compound, new pinion nut, basically everything you need except gear oil.

But yeah, make sure you get 12-bolt truck parts, not 12-bolt car.

Good luck,
Clay

 

[Kain]

thanks for the reply's i found 2 off ebay one for 85 one for 62

85 bucks
http://www.ebay.com/itm/271095386114?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

62 bucks
http://www.ebay.com/itm/201003220207?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

 

[sweetk30]

lots of guys like to ditch the crush sleave and go this route . http://www.summitracing.com/parts/rat-4107

as for kit get QUALITY NAME BRAND bearings like timkin / koyo .

if there is no name or funky name pass on it .

your first kit shows koyo .

sec kit nothing said about brand.

 

[Kain]

Cool thanks, and both those kits use koyo bearins and i was looking for the link you posted