Posi Recommendations for 8.5"

[my1stgn]

Well Im trying to upgrade my peg-leg to a posi unit. I was looking and found various systems for the 10 bolt 8.5" unit I have. I wanted to know what you guys thought about the Powertrax by Richmond

PowerTrax Locking Differentials - JEGS

or Eaton

Eaton Limited-Slip Differentials - JEGS

or Auburn

Auburn Gear Differentials - JEGS

I wanted to get a good diff that could handle a mid 9 second car. Dont think I will be running that fast right now, but hopefully I will be close later on. Just want to build the rear end once and be done with it. Sort of a "bullet-proof" rear end but dont really want to go with a Ford 9" unless it will be around the same price. As for the 10 bolt, not really looking at cutting corners, willing to spend a little money for a better set-up. Thanks fellas!

 

[84TXGN]

I know a lot of guys are very happy with both the Eaton and the Auburn. I would prefer the Eaton just because of what I have seen them stand up to personally.

 

[mhogan6]

30 Spline

Go with Eaton 30 spline, Moser 30 spline axles, and T/A cover.

 

[GNocide]

auburn pro unit:biggrin:

 

[GNVAIR]

Eaton is by and far the most durable and is user rebuildable by replacing the clutches. Auburns are a cone style unit and not very tolerant of burn outs at the track where 1 wheel spins and one doesnt which will cause wear of the internal cones. The price difference between the 2 is minimal. You can replace the clutches in an Eaton in the car. The Auburn must be removed and shipped back to Auburn at a cost of approx $100

 

[Hot Air]

I have the Powertrax. A lot of the rock climbing guys have it as well so you know it is strong. It is either locked or unlocked. Nothing in between. You WILL have equal traction. Also, you can install it yourself without disturbing the gears! The only problem is wwhen pulling out from a stop sign or stop light and making a hard right turn, the inside wheel will grab and spin a little. Be careful when you have a police officer behind you!
Conrad

 

[turbofabricator]

I have the Powertrax. A lot of the rock climbing guys have it as well so you know it is strong. It is either locked or unlocked. Nothing in between. You WILL have equal traction. Also, you can install it yourself without disturbing the gears! The only problem is wwhen pulling out from a stop sign or stop light and making a hard right turn, the inside wheel will grab and spin a little. Be careful when you have a police officer behind you!
Conrad

The Powertrax type of differential also places ALL the load on the cross shaft. (which is pretty weak) They will NOT take high horsepower. The Auburn units, as posted previously, do NOT like burn-outs, even the Pro-series. Go with Eaton and you will have the best street/strip unit available. Full Spools are the strongest, but on the street thay are SCARY! In the rain, you will want to pull over and call a tow truck.

 

[FlaBoy]

DETROIT TRUETRAC


no clutches or cones to ever wear out... just gears.

not sure of the max power capacity, but its built by Detroit/Eaton, so i imagine its pretty strong.

 

[GNVAIR]

DETROIT TRUETRAC


no clutches or cones to ever wear out... just gears.

not sure of the max power capacity, but its built by Detroit/Eaton, so i imagine its pretty strong.

I have installed a some of these into Mustangs 8.8 rears. They are sometimes advertised as a Detroit Locker. It is strong but they are locked as tight as a spool. Pretty scary in wet weather as they dont always unlock going around turns. If you must have something this tight, then you might as well get a spool. Plus the $700 cost might make people think twice about it.

 

[Hot Air]

Has anyone tried the Torsen T-2R?
Conrad