Quote:
Originally Posted by Bimus
3/4 tons and one tons have different brake setup the one ton has wider shoes so the backing plates have a dish shape and the 3/4 ton are more flat
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Depends on the GVWR and brake options more than whether it's a 2500 or 3500 chassis.
High GVWR 3/4 and SRW 1 ton can have the same size brakes.
JB5 = Vacuum booster
JD5 = Hydroboost
JB6 = Vacuum booster
JD6 = Hydroboost
JB7 = Vacuum booster
JD7 = Hydroboost
JB8 (single wheel) = Hydroboost
JB8 (dual wheel) = Hydroboost
JF9 = Hydroboost
xx6 uses 11.15 x 2.75 Duo-Servo drums
xx7 and xx8 use 12.5 x 1.26 rotors... except JB8 with dual rear wheels that has 12.5 x 1.5 rotors.
xx7 has 13 x 2.5 rear drums
xx8 has 13 x 3.5 rear drums
JF9 has 13.86 x 1.435 front rotors and 13.58 x 1.435 rear rotors