Posi??

[Damien_63]

I'm lookin for a new rear end because I'm getting kind of tired of only leaving a single burn out mark. Any suggestions as to what route to go for 383 w/TH350?

[lt1s10]

I'm lookin for a new rear end because I'm getting kind of tired of only leaving a single burn out mark. Any suggestions as to what route to go for 383 w/TH350?

as tech always say, add an air shock to the r/rear and add a little air to it, makes the best, cheapest posi you ever seen.

[Dave Severson]

9" Fords are still the best, shouldn't be too tough finding one the right width for your pickup. Got one out of a Lincoln that has disc brakes on it, 63" from wheel mounting flange to wheel mounting flange

[Damien_63]

What gears do you recommend? And the 9's are posi?

[gassersrule_196]

use a 12 bolt beefed chevy rearend. or an early olds rearend. or find a dana 60

[rud]

use a 12 bolt beefed chevy rearend. or an early olds rearend. or find a dana 60

i'm soon to be needing a "posi" you piqued my interest when you mentiomned early olds as having that rear end. what early years are we talking about? my donor is a 1979 cruiser wagon, converted from deisel to gas

[NTFDAY]

I'm lookin for a new rear end because I'm getting kind of tired of only leaving a single burn out mark. Any suggestions as to what route to go for 383 w/TH350?

I'm surprised that the rear end is still together, I tore 3 of them up when I had the 400 in my '62.

[robot]

Damien,
"posi" or pisitraction is a General Motors term for a clutch type limited slip. Other car companies use different names for the same principle. In addition to clutch type limited slips, there are also designs that do not use clutches; they use ratchets or some gear form instead. However, all get lumped into the "posi" bucket.

When you ask if a particular rear end is a posi, the answer is maybe yes and maybe no. There is no axle type that is always either a limited slip or not a limited slip......limited slip was and is an option. Therefore, just because you buy a 9-inch Ford axle, you dont know if it is or is not until you check it.

"posi" or limited slips use the same ring and pinion as does a non-posi axle...a non posi axle is referred to as an "open" rear end. The carrier is the part that the ring gear bolts to....it is different for a posi. If you have an open rear end, you can change it to a posi by replacing the carrier and setting the mesh on the ring and pinion.....or you can have it done by a compentent mechanic.

The addition of a posi does not make the rear axle stronger.

hope this helps you understand

mike in tucson