Quote:
Originally Posted by Hammered 77
Is the brake upgrade just for 4/4s or will it work on 4/2s also?
Thanks
Rick
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Based on Rockauto's cross reference, it works for both. There's a big piston caliper (JB7/JD7 - 13" - 3-5/32" piston diameter) and a smaller piston caliper (JB6/JD6 - 11" - 2-15/16" piston diameter). Starting in 1979, they started using the 10mm banjo bolt. Earlier than that, the banjo bolt was like 7/16".