natep1 said:Cast rotors will have an overall height of 3 1/16"
Composites are 3 3/16"
XJTJYJ said:That is a PITA. Is ther anyway to tell by looking at them? Perhaps some markings or something. Would my dealer tell me? (would the dealer be correct?)
Eagle said:Confirm that they have different dimensions, so it isn't a question of buy the one you want, as RichP suggested. However, I was under the impression that 1999 was the year they made the change (mid-year, mid-production change), and that all 2000s were cast rotors.
Should be easy to check the overall depth on the vehicle. Jack up one wheel, remove tire, lay straightedge across wheel mating surface of rotor, hoof tape measure tip beind rotor ==> read tape.
In general, the parts to be concerned with in keeping the front brakes compatible are the steering knuckles, the hub/bearing assemblies, the rotors, and the calipers. (There is a more complete enumeration of the interrelationship of these parts in Chapter 6, Axles.)
· Only two steering knuckle designs were used: 1984 through 1989, and 1990 through 2001. Left and right side knuckles are different part numbers within each group.
· Three different hub/bearing units were used. The hub/bearing units are the same for both sides of the vehicle. The different years for hub/bearing assemblies were: 1984 through 1989; 1990 through mid-1999 (composite rotors); and late-1999 through 2001 (cast rotors).
· Three rotor types were used: 1984 through 1989; 1990 through mid-1999 (composite); and late-1999 through 2001 (cast).
· Only two caliper types were used: 1984 through 1989, and 1990 through 2001. Left and right side calipers are different part numbers within each group.