Saw it done years ago during my 3.55 installation (by a seasoned old car mechanic). Ran a piece of brown paper bag through the ring and pinion to check how things meshed. Must've been good, because I've got many thousands of reliable miles on that diff. Anyone know the details on that procedure? Is it the magic thickness for proper backlash or something?


Matthew 6:33

1952 Chevy 1/2-ton 3100
Late '55 235/SM420/torque tube 3.55
Dalton Highway survivor (using original 216)
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