If it is "consistently 6-7 mph over" it isn't a gearing problem. A gearing problem would be X mph over at 15 mph, 2X at 30 MPH, 3X at 45 MPH and 4X at 60 MPH.
Last edited by Bill Hanlon; 08/16/2026 4:34 PM.
'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.
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