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Rotor caliper issue. Help....

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Old Feb 9, 2012 | 09:24 PM
  #1  
90IROC1's Avatar
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From: Santa Rosa, CA
Car: 90 IROC-Z
Engine: LB9
Transmission: M5 5spd
Axle/Gears: 3.42 POSI
Rotor caliper issue. Help....

The back side of my rotor is hitting the caliper case and rubbing metal to metal on my 4th gen conversion. I am wondering how to correct the problem, would I make a 1/8 spacer to put between the axel and the rotor? Any help would be much appreciated.
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Old Feb 10, 2012 | 06:50 AM
  #2  
JamesC's Avatar
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From: Lawrence, KS
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: Rotor caliper issue. Help....

Originally Posted by 90IROC1
The back side of my rotor is hitting the caliper case and rubbing metal to metal on my 4th gen conversion. I am wondering how to correct the problem, would I make a 1/8 spacer to put between the axel and the rotor?
Did you use LT1 backing plates? Some 90-92 10-bolts with PBR's (which are the same as the 93-97 version) required shims to center the calipers over the rotor. Shims can be seen below in post #2 (behind the backing plate and on the floor):

https://www.thirdgen.org/forums/faq-...iscs-89-a.html

Any pics of your set-up?

JamesC
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Old Feb 24, 2012 | 07:13 AM
  #3  
Ryan 97 WS6 T/A's Avatar
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Re: Rotor caliper issue. Help....

It's your axles. If you put 93-97 brakes on a 98+ rear the axles aren't the correct length. You need to get a set off an LT1.
Wish I had caught you sooner, I have a complete 3 channel swap off a 2001. Just joined this board specifically to sell it.
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Old Feb 24, 2012 | 07:28 AM
  #4  
JamesC's Avatar
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From: Lawrence, KS
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: Rotor caliper issue. Help....

Hey, Ryan,

Welcome to TGO.

It would have been nice for the OP to have checked back in so that he could have detailed exactly what his 'fourthgen' conversion was.

JamesC
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Old Feb 24, 2012 | 08:08 AM
  #5  
Ryan 97 WS6 T/A's Avatar
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Re: Rotor caliper issue. Help....

Thanks James. What's OP mean?
PM'd you
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Old Feb 24, 2012 | 08:16 AM
  #6  
JamesC's Avatar
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From: Lawrence, KS
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: Rotor caliper issue. Help....

Originally Posted by Ryan 97 WS6 T/A
What's OP mean?

PM'd you
Original Poster.

Saw the PM. Will do.

JamesC
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