Originally Posted by VEW
Mike. You say to 57, but wouldn’t 58/59 be the same?

I just checked the GMC parts book. Same thing where these parts are used on 55.2-57, but not 58-9.

The "TXY" are years 57, 56 and 55.2. The "4" is how many. The "22M, H110" and so on are the various axles these brakes were used on, followed by a description.
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Last edited by Bill Hanlon; 12/17/2023 6:19 PM. Reason: new info
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.