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#1
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I am to tired to dig it up the stuff I have on the subject ..but I looked at a trans 2 yrs ago and it was 72/3/4..??? trans had fine spline input looks like a M22, I may have my facts bassackwards here but I think they made M20's in the early 70s that looked like M22's...anyway thats how I recall how it went..something screwy anyways. Jeff was working with me on it..Jeff you recall how that went???
Bud. |
#2
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Here'e a photo of the 4sp Muncie transmission assembly ID tags you might find ...These photos are courtesy of "The Chevelle Report"--Mark Meekins-----The best publication while it was out
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#3
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Amen
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#4
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For what it's worth (perhaps nothing) here is a shot of the head gear in my M22. Just so happens to be out of the car right now.
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1969 Z28 1972 Corvette |
#5
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#6
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Since you've already confirmed it's not an M-22, if you want to determine if it's an M-20, or M-21, simply count the teeth on the input shaft. 21 teeth = M-20, 26 teeth = M-21/22. The exception is the Early M-20 with 24 teeth.
(M-21, and M-22 have the same gear ratios). ALL M-22 regardless of the year should have a drain plug. ALL 70 up "661" cases have the drain plug regardless of ratio. ALL "661" boxes from 70 - 74 have 26 spline input shaft, and 32 spline output shaft. ALl info taken from www.gearzone.net
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Dennis 69 Nova 355, M-21, 3.90 12 bolt 68 Chevelle SS 396 4 sp |
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