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PBR calipers vs rear drums

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08-15-2017, 01:07 PM

#1

shaynecastongua

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Car: 1985 Trans Am

Engine: Chevy 355

Transmission: T5 NWC

Axle/Gears: 3.23

PBR calipers vs rear drums

Hey guys, I had to replace the rear in my 85' Trans Am and decided I'd upgrade to a 4th gen PBR caliper equipped rear while I was in there. I have the stock MC and proportioning valve. I had read something that said the fluid specs for the PBR calipers were very close to those of the stock drums, and that no further modification would be necessary. Can anyone confirm/deny this?

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08-15-2017, 01:32 PM

#2

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Car: 1989 IROC-Z. Original owner

Engine: LB9. Dual Cats. Big Cam

Transmission: World Class T-5

Axle/Gears: BW 3.45

Re: PBR calipers vs rear drums

I believe that is correct.

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Old

08-15-2017, 04:57 PM

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Car: Met. Silver 85 IROC/Sold

Engine: 350 HO Deluxe (350ci/330hp)

Transmission: T-5 (Non-WC)

Axle/Gears: Limited Slip 3.23's

Re: PBR calipers vs rear drums

If you have the OE drum master, you have the correct one.

JamesC

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Old

08-15-2017, 06:36 PM

#4

shaynecastongua

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Car: 1985 Trans Am

Engine: Chevy 355

Transmission: T5 NWC

Axle/Gears: 3.23

Re: PBR calipers vs rear drums

That simplifies things a lot. Thanks guys.

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