Heavy duty 4spd
07-05-2018, 08:01 PM
#2
Race Director
07-05-2018, 08:10 PM
#3
Safety Car
Base engine 71 was only available with the M20 wide ratio 4 speed and M40 automatic.
Last edited by Iceaxe; 07-05-2018 at 08:11 PM.
07-05-2018, 08:10 PM
#4
Team Owner
Member Since: Feb 2003
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unless you pulled the side cover and you see straight cut gears you have a standard M20
07-05-2018, 10:16 PM
#5
Talked to spec clutches. They seem to think 26 was heavy duty. I thought m22 had 10 spline as,well as straight cut gears.Makes me wonder if they know much about them.Said I needed same clutch as big block
07-05-2018, 10:23 PM
#6
Good grief. Then a standard 26 spline disc 11 inch clutch should work providing the sell me right throw out bearing. Already pulled two ram muscle car clutches due to defect
07-05-2018, 10:26 PM
#7
Melting Slicks
All 1971 Muncie 4-speeds (M20, M21, M22) had 26 input splines - so tells you nothing.
Number of grooves on the input shaft though may tell you what you have if it's unmolested.
M20 = 2, M21 = 1, M22 = none
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EarlyC34me (07-05-2018)
07-07-2018, 09:22 AM
#8
Le Mans Master
1970 and up Muncie uses 26 spline input shaft on everything (M20, M21, M22) including base models. The tailshaft housing has only 3 shifter mounting holes so they are easy to identify.
Last edited by stingr69; 07-07-2018 at 09:25 AM.
07-07-2018, 11:16 AM
#9
Racer
In 1970 only 454 Chevelles got M-22's with 26 spline input/32 spline output...
All other M-20, M-21, and M-22's used 10 spline input/27 spline output...
In 1971 and later all Muncie's used 26 spline input/32 spline output...
Hope this helps... Eric
All other M-20, M-21, and M-22's used 10 spline input/27 spline output...
In 1971 and later all Muncie's used 26 spline input/32 spline output...
Hope this helps... Eric