Will 3.73 posi out of an 84Z swap with a 3.23 posi out of an 88 formula???

 

The whole axle? Sure. If both axles have disc brakes, then re-use your '88's calipers, they're probably in better shape. Replace all the brake hoses and e-brake cables while you're at it. If you search the internet thru http://www.yahoo.com or similar for "carparts.com coupon", you can usually find some big savings. I used a $50 off $100 purchase coupon, and got all of my 86/3.42/open/drum to 84/3.73/posi/disc brake hardware for $60!

If your '88 doesn't have discs you need the prop valve and master cylinder for the J65 (4wheeldisc) setup.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

just the gears. the 84 has drums and the 88 has discs

 

The 84 has drums? I thought the only 3.73/drum axle had an open diff, not a posi.


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

The gears came from another 84Z that had disc's originally