Deuce m21 input/output shafts & castings
 

HI

just going to have my deuce M21 freshened
wanting to ensure the shafts and the main & tailstock castings PART # are correct

what is the correct input and out put shaft spline counts
for 1970 DEUCE M21
they can be 10 input 27 output OR 26 input 32 output

what main housing and tailstock housing part #'s should i have

thank you
regards
chris

The input shaft is 10 tooth. I believe the output shaft is 27 tooth, but not exactly sure - it's whatever a TH350 is....

You will need a...

661------- main case
648-------- side cover
584-------- tail housing

10 spline input
27 spline output

Very early 1970 production (August &September 1969) would use a 660 main case...

Hope this helps... Crash

thank you so much guys for the help with this

just want to make sure everything is correct prior to tranny shop freshens it........these things tend to get monkey with over the years...LOL

my M21 does have the 10 spline input and 27 spline output
the main case is the #661
the tailstock case is the #584
the side case cover is the #648

and the muncie I.D. tag on the side case is #3968011 WL (HOPE THIS TAG IS CORRECT?)

thanks again guys
regards
chris

crash

you seem to know a lot about these muncie trannies

my muncie I.D. tag on the side case is #3968011 WL

is this correct for my deuce

thx?
chris