Chrysler 8 3/4 rear axle rebuild. (NEED TIPS)

[71CudaDrew]

Ok guys so I am new to the site ...kinda... but for sure new to rebuilding a rear axle off of a 71 cuda...(does not seem all that complicated). But it does not have posi trac or sure grip.  :feedback:I have a 440 6 barrel going into the car so I want to make sure everything is at least sufficient enough to take to a drag strip on a off day  . Can you guys give me any tips or suggestions on how to go about rebuilding and adding/modifying the rear axle to at least achieve better than stock.   

[brads70]

Depending on your budget  you might be further ahead getting a new Dana from DrDiff (Cass) After others on here giving me the same advice that's what I did and sold the 8 3/4 while it was still in one piece.

[jimynick]

Man, you sure know how to hurt Brad. Wish I had one. 

[brads70]

Just passing on advice others gave me when I was considering re-doing the 8 3/4. The bare Dana without the disc brakes ( your 8 3/4 drums will bolt on) was around $1800. Doesn't take long to dump that into a 8 3/4...?

[HP_Cuda]

True that!

Just passing on advice others gave me when I was considering re-doing the 8 3/4. The bare Dana without the disc brakes ( your 8 3/4 drums will bolt on) was around $1800. Doesn't take long to dump that into a 8 3/4...?

[jimynick]

Just passing on advice others gave me when I was considering re-doing the 8 3/4. The bare Dana without the disc brakes ( your 8 3/4 drums will bolt on) was around $1800. Doesn't take long to dump that into a 8 3/4...?

Oh, no argument; I'm just suffering from diff envy, that's all. 

[Jamiez]

My understanding is that rebuilding the diff and setting it up correctly needs some specialist tools and knowledge.  I've never tried it myself but I've heard it's a job best left to the professionals.

[73440]

With this book , think I would try the rebuild.

http://www.themotorbookstore.com/jeep-dana-chrysler-differentials.html

[73sixpack]

8-3/4 are one of the easiest to set up, toughest part is getting the pinion depth right, (pulling the big bearing off, often multiple times, to change the shim). Don't worry too much about strength of the 8-3/4 (489 or 742) unless your doing 4 grand clutch drops, mine held up with no problems in 8 years of drag racing with an automatic and slicks @ 1.70 60' times, almost lifting the front wheels. And they're lighter than the Danas.

[dodj]

He must be done by now. The thread is almost four years old? 

[jimynick]

   ka-ka occurs!

[dodj]

With this book , think I would try the rebuild.

http://www.themotorbookstore.com/jeep-dana-chrysler-differentials.html

But thanks for the link 73440, I bought it.

[73440]

But thanks for the link 73440, I bought it.

SA 170 from S A Design is also a good book.
http://www.themotorbookstore.com/high-performance-differentials-axles-drivelines-how-to-book.html

Being the shade tree parts changer " mechanic " I am, reading thru FSM's and books and C-C and friends helps me to tackle projects.