Hello,
Is it possible to get a 12 bolt drum onto a 83 Berlinetta coupe with no problem or would I have to modifie things?
Is there any rearends I can get at the yard that would go right onto my Camaro? Besides the ****ty 10 bolt 7.5 rear end drum !! I hate that damn thing......
Your help is needed and most appricated.
Erik

[This message has been edited by CamaroLuvnPunk (edited August 28, 2001).]

 

Since a 12 bolt never came on a Thirdgen, you have 2 choices. You can "modify" things or you can buy a custom 12 bolt housing that is built to fit the ThirdGen from someone such as Moser. Yes there are better 10-bolts with 7.625" ring gears, posi's and discs. Or 9-bolts with 7.75" ring gear, posi & discs. The 10-bolts would be more common that the Borg Warner 9-bolts though. Keep an eye out at the local Pick-A-Part of contact a ThirdGen Used parts supplier. I've bought two 9-bolts used with 3.27 gear ratios for $200-$300.

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90 RS Convertible
Owner: Top-Down Solutions
(626)369-0040

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[This message has been edited by lonsal (edited August 28, 2001).]

 

The only way you could install a factory 12 bolt found in the junk yard into a third gen is to convert your rear suspension to ladder bars or a 4-link.

The problem is that there's no way to attach the torque arm to the 12 bolt diff. An aftermarket 12 bolt for third gens have a mounting pad cast into the housing for the TA to attach to.

If you choose to convert the rear suspension, try to find a 12 bolt from a first gen f-body. It will be narrow enough to fit under a third gen. 12 bolts from trucks or A/G bodies are too wide.

Nothing wrong with a 7.5 diff if it's properly built up. I'm still using one but plan on going to a 9" this winter just to get a deeper gear ratio and larger axles.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

[This message has been edited by Stephen 87 IROC (edited August 28, 2001).]

 

The Borg Warner 9 bolt is stronger than the 10 bolt. Gears to 4.10 are available (and so are new carriers)

Miles

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88 427 Camaro
12.18 @ 113mph 1.75 60ft
Currently installing 3.73's into my 9 bolt (YES, it is a 9 bolt & YES they are 3.73's, not 3.70. I currently have 4.10 gear sets and new series 3 carriers in stock for 9 bolts )
www.koolmeister.com