" Date: Tue, 14 Aug 2007 17:25:39 -0600 " From: Frank Swygert <farna@xxxxxxx> " " I just checked an 81 TSM. Four cylinder Spirit/Concord had a 10.27" " rotor, six cylinder a 10.80" (the most common), and all Eagles an " 11.02". Different suppliers? That's almost a 3/4" difference from the " Sprit/Concord four to the Eagle, but the Eagle calipers bolt to the " steering knuckle (upright), not an adapter. So we're really just " talking about the difference between 10.80" and 10.27" -- 0.53". That " difference is split in two, so it's just a bit over 1/4" (0.265"). " Could be a different bracket or caliper, but I doubt it. The " difference could easily be made up with a different pad using the " larger diameter adapter and caliper. In fact, I'm pretty sure the " caliper is the same. I don't have an 80s parts book to look up the " adapter. I know the pads are different though. just checked my napa books - calipers aren't listed, but 4 & 6 cyl caliper rebuild parts are the same. pads are different. btw it shows the small bendix calipers '77-'81, with several different rotors [large and small bearing] and the delco calipers with the same small bearing 6-cyl and eagle rotors '82-up. iirc the 4-cyl rotors are solid and the pads -really- thick. btw these were made to work in 14" and even 13" iirc wheels, but the eagle rotors were only used in deep-offset 15" and btw shared with cherokees and wranglers to '89. they were also designed for a drive axle; 2wd jeeps could have either this disk on a separate hub or a 'unicast' rotor. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://www.amc-list.com/mailman/listinfo/amc-list