What rearend would you recommend
 

I am thinking about changing the rearend from a 10 bolt to 12 bolt in my 82 GMC Stepside, is their any factory posi units in certain trucks or suburbans I should look for

Re: What rearend would you recommend
 

i like em tight kinda small and shapley. but,everybody's different...just kiddin man.trying to lighten it up on here a little bit.depends on what you want if you tow,or want fuel economy?overall tire diameter makes a huge difference.i had an 02 dodge cummins that had i think was a 3.53,i put 35's on it and made a big difference decreasing my towing grunt compared to 31's it came with.

Re: What rearend would you recommend
 

I personally wouldn't swap rearend just to say I have a 12bolt.

http://67-72chevytrucks.com/vboard/s...d.php?t=217716

As far as finding an old truck with a posi in it, good luck in 2WD form. For chosing a limited slip, for drag I would go with an Eaton Clutch type which is the style that came in most all of the 12bolts.

Re: What rearend would you recommend
 

not doing it to say i have a 12 bolt. i just heard they were stronger. just trying to get some opinions

Re: What rearend would you recommend
 

If you are not going to race it I would stick with the 10 bolt and go with the 3.73 gears. MO

Re: What rearend would you recommend
 

I think the 10's are better axle wise with no taper....I think. Just posi and gear what you got. You really can't hurt either without huge (35" plus) mudders.

Re: What rearend would you recommend
 

going to a 12 bolt invloves careful measuring of driveshaft. it actually should be changed. at min you need to swap to a $25 'switch over' U-joint cause the caps are different sizes. . federated number #372. crossy

Re: What rearend would you recommend
 

hiway what kind of posi do you recommend

Re: What rearend would you recommend
 

what are you doing with the truck? a 9" out of a ford truck will work. you have to re drill the axles and brake drums to the 5 on 5 pattern to keep your wheels

Re: What rearend would you recommend
 

A 9" out of an older lincoln will already be 5 on 5...and have disc brakes too. :)

I say upgrade your 10 bolt, and add an Eaton posi (pretty much the same as what GM used).

Re: What rearend would you recommend
 

The only issue with using the lincoln disc braker is the pumpkin is offset, so the driveshaft will be on an angle. I know alot of guys using the seville disc brake rear, its a 10 bolt, has the 5 on 5 pattern, the pumpkins centered, and its narrower, so it allows you to run larger meats in the rear
Oh, and on half off day @ the boneyard, its around $75

Re: What rearend would you recommend
 

Eaton, Moroso, factory, pretty much any clutch type....for smoothness. Stay away from the factory "hammer" types.

Re: What rearend would you recommend
 

Did not know that, excellent tip. :)