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View Full Version : M20, M21 or M22?

musclecar fan
08-01-2016, 10:40 PM
Can Anyone ID this by looking at the gears? M20, M21 or M22?
L72Chevelle
08-01-2016, 10:49 PM
The two lines on the cluster gear would mean M20. Does it also have two lines on the input shaft?
300deluxeL79
08-01-2016, 10:58 PM
not an M22...
musclecar fan
08-01-2016, 11:02 PM
No lines, fine spline.
http://www.yenko.net/ubbthreads/pics/usergals/2016/08/full-2346-47111-s_l1600_1.jpg
Ls6 Ragtop
08-02-2016, 12:02 AM
That's an M20 wide ratio. Count the teeth on the input gear. Should be 21 teeth which identifies it as 2.52 to 1 wide ratio 4 speed.
That's a replacement input shaft which was available with no spline identification or "rings" located on the spline.
Chris