24475, RE: Interesting find on the GSX front brake upgrade...rotor size..
Posted by CODE4, Dec-31-69 06:00 PM
ROTOR INFORMATION for AWD and FWD
I called my parts guy at NAPA today and asked him to do a little research in his spare time. Here are the results that he faxed me:
1995-1997 Eclipse/Talon AWD Front Rotors use NAPA part #86153 and have the following dimensions:
10 55/64” diameter
0.882” thick
1 25/32” tall when laid flat
1998-1999 Eclipse/Talon AWD Front Rotors use NAPA part #86735 and have the following dimensions:
10 35/64” diameter
0.882” thick
1 53/64” tall when laid flat
I have also confirmed this change in part # with the dealer. 1995-1997 rotor # is MB928319 and 1998-1999 rotor # is MR334998.
98-99 rotors are slightly smaller in diameter and have a slightly larger offset when mounted on the hub. This is odd since caliper part #s are identical throughout all years. This dimension change could account for some problems people are encountering when performing a GSX upgrade.
It seems that the rule of thumb is to buy parts for the same year vehicle that you own when performing the OEM big brake upgrade.
And for those that are interested, I also have the part numbers for FWD rotors and dimensions for them.
1995-1998 FWD Talons and 1995 FWD Eclipse use NAPA part #86162 and have the following dimensions:
10 5/64” diameter
0.882” thick
1 51/64” tall when laid flat
1996-1999 FWD Eclipses use NAPA part #86723 and have the following dimensions:
10 15/64” diameter
0.882” thick
1 25/32” tall when laid flat
Why there is a part number difference I do not know. Stranger more is the fact that the 95 Eclipse has a different part number that the 96-99s. The dimensions are negligible enough that I do not think it would cause any problems, but then again there is a problem occurring when performing the GSX upgrade.
EDIT: One potential solution for those that have rotors that are binding against the caliper is using agrade eight washer or two between the caliper bracket and steering knuckle. I have not encountered this problem myself but when I do the upgrade, I will use parts from a 99 GSX and post my results (and problems if any).
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