Need 9 bolt backing plates
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Junior Member

Joined: Jul 2003
Posts: 75
Likes: 0
From: Buckeye, AZ
Car: 1988 IROC
Engine: 350CI
Transmission: 700R4
Axle/Gears: 9 bolt 3:70
Need 9 bolt backing plates
Does anybody out there have a set of backing plates for a 9 bolt diff with disc brakes? I need a set to put the rear end back under my car. Please let me know if you know where I can get some.
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iTrader: (8)
Joined: Jul 2001
Posts: 3,204
Likes: 7
From: New Boston, IL, USA
Car: '90 Formula 350
Engine: 383 SBC
Transmission: ProBuilt S/S 700-R4 & ACT 9" Stall
Axle/Gears: 10 bolt 3.23
Re: Need 9 bolt backing plates
I think these are the stock sizes... http://flynbye.com/catalog/i31.html
Ed also carries them for larger brake conversions too.
You could try your local GM but I doubt they have them.
I don't know about other places, but be prepared to explain to people that you didn't miscount and it's actually a 9 bolt not a 10 bolt. I had Summit Racing Tech try to sell me a 10 bolt ring and pinion for about 20 minutes repeatedly telling me I must have miscounted the bolts on the pumpkin.
Ed also carries them for larger brake conversions too.
You could try your local GM but I doubt they have them.
I don't know about other places, but be prepared to explain to people that you didn't miscount and it's actually a 9 bolt not a 10 bolt. I had Summit Racing Tech try to sell me a 10 bolt ring and pinion for about 20 minutes repeatedly telling me I must have miscounted the bolts on the pumpkin.
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iTrader: (3)
Joined: Aug 2006
Posts: 1,439
Likes: 3
From: Tucson, Arizona
Car: 1987 IROC-Z Camaro
Engine: L98 5.7L TPI
Transmission: 700-R4
Axle/Gears: 3.27 BW
Re: Need 9 bolt backing plates
Iron or Aluminum calipers? I have a set for the aluminum I plan on installing on my car, so I will have a set of iron available soon. I'd get rid of the whole iron brake setup if you come get it. Let me know so I know if I need to rush on the aluminums.
Joined: Jul 2009
Posts: 376
Likes: 0
From: PHX
Car: 91' RS
Engine: 310 C.I.D. + n2o
Transmission: T-5
Axle/Gears: built 10 bolt 3.73's
Re: Need 9 bolt backing plates
i think you counted the bolts wrong.....ha ha just playing i got some if you need them i live in the area of 75th ave and mcdowell pm me if you want them
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