I own a 86 TA with the WS6 suspension and disc rears. Out of curiousity, I crawled under my car and counted 9 bolts. I looked at the tech sheet that was posted and there is nothing listed about Trans Ams having the 9 bolt rear end. Does anyone know anything on this subject or if all trans ams w/ the WS6 setup cam standard with the 9 bolts?

I posted this under the wrong section and have reposted it under the drivetrain section. I tried removing it but found that I am powerless. Could a moderator please remove this post? thanks!

Slo86TA

 

I believe that Pontiac has offered the 9 bolt since 1985.

 

Yep, my friend's 86TA has a 9bolt, and that's stock...

 

You talkin' 'bout me?

My '86 has the 9-bolt Borg axle, with discs, with posi, with the rubber fill plug in the rear cover, and WITHOUT the 'C'-clips at the ends of the axles inside the differential side gears. Yes, it's stock, and quite a bit stronger than the Saginaw 10-bolt version. It's no 12-bolt monster or Ford (Dana) 9" axle, but its plenty strong for an 'F' car. If the RPO label in the console has a "G80" and "J65", you should have the Borg axle. Congratulations. If you break it, your gonna have a helluva time finding parts, though...

 

Not anymore www.9bolt.com

And it's been compared to a Dana 44 in terms of strength. The most common reason they break is because of worn out parts causing excessive backlash. I've been running a 9 bolt for almost 4 years behind my big block (500hp/520lbft) with no problems.

Miles
Diff Solutions

 

427,

Thanks for the link - You da MAN!

I'm keeping that one on hand, 4-sure.

EDIT: After seeing the site, I'm thinking you might want to talk to Dirk about a banner ad/sponsorhip. There are a LOT of Borg axles represented on the boards, and this is the first time I've even seen the link. (I guess I need to get out more often.) It could be a mutually beneficial arrangement.

 

I was going to post that this afternoon, but when I went to it at work, the **** filter blocked it.

I guess my boss doesn't want me shopping for 9 bolt parts while I'm on the clock.

 

Yup, my brothers 85 TA w/305 TPI has the 9 bolt.

 

Hey Miles, know much about shimming a used 3.27 BW 9bolt? My old 2.77 was TIGHT but the 3.27 with Spohn LCA brackets is almost a peg legger.

THX again.

BTW Brake Cone shim table a place to look?


OK (me being stupid!)
surfed the website, you got shims.

 

Vader,

Miles (the guy who posted the 9bolt link) posts all the time in the drivetrain and transmission forum.