1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Attention: Anybody that has quick access to a GSLSE rear brake disc!!

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Old Aug 26, 2007 | 12:57 PM
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HOZZMANRX7's Avatar
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Attention: Anybody that has quick access to a GSLSE rear brake disc!!

and a micrometer.

On second review, for a GSLSE, .866 (22MM) standard and .787 in. (20MM) minimum makes no sense even though thats what the FSM book says.

My existing ones measure at .76 and no wear lip on the edge and 70% of the pads still there. So, the entire disc would have had to wear .1 inches since last brake job which makes no sense. Especially considering my remaining pad life.

The GSL-SE uses the same rear pads as a 2nd Gen, and rear disc standard on a 2nd Gen is .787 in (20MM) and minimum .71 (18MM)

Further, if the FSM is correct, on a GSLSE front discs standard are thinner (18MM) than the rear (22MM). To add more color, I do have a set of new front GSLSE discs, and it measures about .87 inches (essentially 22MM). Further evidence that the FSM is messed up on this subject.

So, the only way I can think to clear this up is if someone could measure the thickness of a new rear disc and post how thick it is. I'll bet it's 20MM. If it's 22MM, I'll eat sardines.

Again, there is no minimum stamped on my rear discs anywhere. So no reference there.

Last edited by HOZZMANRX7; Aug 26, 2007 at 01:08 PM.
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Old Aug 26, 2007 | 01:54 PM
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front rotors shound be .866" when new, discard at .787".

rear rotors should be .787" when new, discard at .709"
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Old Aug 26, 2007 | 02:02 PM
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.787 in (20MM) standard, .709 (18MM) minimum. Same as 2nd Gen.

That makes sense.
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Old Aug 26, 2007 | 06:23 PM
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And, to complete this story, I got my hands on another set of rear GSLSE discs, and that set has 18MM min. stamped on the inside edge
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