change to posi

[big gear head]

If you are going to get a posi you might as well get the best one. The Eaton is better in my opinion. The Auburn has a few things that I don't like. The PowerTrax is easy to install, but doesn't operate as smooth as the Eaton. There are several options for the 8.5 10 bolt, such as the Detroit Locker, ELocker and some others. For a street/strip car the Eaton is probably the best for the money.

I'm trying to write a book, just can't seem to find the time.

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Byars Performance LLC
High Performance Drive Train Parts And Service
www.lubedealer.com/biggearhead

[This message has been edited by big gear head (edited December 11, 2004).]

 

[runnin350]

Ok Im getting ready to order and am confirming the grear ratio. It is supposed to have 3.08. With one turn of the driveshaft the tire makes less than 1/2 rotation. On full tire rotation is just under 1 1/2 driveshaft rotations. Am I doing this wrong, cause Im not even getting close.

 

[night rider]

Another vote for the powertrax lockright.

I installed one in my 88 camaro and love it.

The install was fast, and easy. No probs with the unit at all.

I thought the "clicking/clunking/banging" that everybody kept talking about was gonna be bad, but it's almost as quite as an open rear.

If you have a performance exhaust system, the only time you'll ever hear anything is at for slow speeds (5 MPH or less) turning into a parking space.

Turning tight turns (90*) out of a road at a stop sign the wheels will 'hop' alittle

And if you drop the throttle in the middle of a curve the rear of the car will 'wiggle' a twitch.

Wheel spin was cut in half if not 60% less than the open rear

 

[big gear head]

Leave one wheel on the ground. Mark the drive shaft and the wheel that is off of the ground. Turn the wheel exactly 2 full turns and count the number of turns that the drive shaft makes. This will be the gear ratio. This is for a rear end with a standard differential. A posi requires a little different method.

------------------
Byars Performance LLC
High Performance Drive Train Parts And Service
www.lubedealer.com/biggearhead

 

[73454]

I re-used my original shims and the backlash came out right on the button where it was before. I don't know if I got lucky or not, but it is always worth a try before you spend the money on an un-necessary shim pack like I did.

:edit:

By the way, if you do get an Eaton, run the Ford friction modifier. It runs way smoother than the Chevy modifier does.

[This message has been edited by 73454 (edited December 13, 2004).]

 

[wyant777]

can you tell a 2 series carrie from a 3 seris carrier buy looking at it!

 

[badazz81z28]

If swapping a diff out is too much work or skill involved, look in to a lock-right. I did that swap with my 1978Z. Took about 30 minutes and I was happy with the results.

 

[big gear head]

Wow, this is an old one. Yes, the 8.5 Traction Lock 2 series is 410409 and the 3 series is 410408. All of the new Eatons are 3 series.

 

[yoyo74]

I for one regret the lock rite unit ,but that is me.It is first on the re-do list someday but it does work and is easy to install.

 

[AJ_72]

Hey, big gear head,

How do you set the pinion depth? My rear end is whining around corners, and I suspect the pinion bearing is shot.

I was going to attempt to pull it and have a new bearing pressed on, as well as change the carrier bearings, seals, etc.

But is it possible to set the pinion depth without the use of the $100 tool? I've read the size of the shim(s) is usually stamped on the shim and you should just replace them with the same size, but will that work when you change bearings?

Thanks,
AJ