84 rear in 89

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Jun 15, 2003 | 09:34 AM

89formula35O

Thread Starter

Junior Member

Joined: May 2003

Posts: 61

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From: Hatboro Pa

84 rear in 89

would a 84 Z28 HO 5 speed 3.27 9-bolt posi disc fit in a 89 formula?
thanks
chris

Jun 15, 2003 | 10:16 AM

GMTech

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Joined: Jul 1999

Posts: 2,767

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From: Vereinigten Staaten

Car: Take

Engine: Your

Transmission: Pick

Yes. All thirdgen rearends, whether it be a BW 9-bolt or an American Axle/Saginaw 10-bolt, use the same mounts. If you are going from disc to drum, or PBR calipers to cast iron calipers, the parking brake cables will vary as will the proportioning valve.

Jun 15, 2003 | 10:50 AM

RB83L69

Supreme Member

Joined: Jul 1999

Posts: 18,457

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From: Loveland, OH, US

Car: 4

Engine: 6

Transmission: 5

Sure, except that there's no such thing as a 84 9-bolt. Either the rear came from some other car, or it's mis-identified. See "features from the future" near the bottom of this post.

https://www.thirdgen.org/techbb2/sho...hreadid=184623

Jun 15, 2003 | 11:30 AM

89formula35O

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Junior Member

Joined: May 2003

Posts: 61

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From: Hatboro Pa

hmmm ill have to ask the kid about the 84 part, thanks!

Jun 15, 2003 | 04:01 PM

MdFormula350

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Joined: Nov 2001

Posts: 11,634

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From: Maryland; USA

https://www.thirdgen.org/newdesign/tech/techdb.shtml

84 Z28 M5 L69 V8 9.5:1 5.0 (305) 190@4800 240@3200 4bbl HO 3.73 10 bolt

if it does have posi and disk brakes that would be a nice rear end.