deciphering a Muncie

[Tommy]

I found this in the garage today and I think it is a 67 model M21. here are some pictures. Thanks in advance for a positive ID.














Those aren't bad photos for a cell phone ...

Tommy

[al8apex]

from http://www.camaros.org/drivetrain.sh...missionNumbers

tymdds

where:
t = transmission type

MANUAL AUTOMATIC
S = Saginaw 3-speed A = 68/69 L6 Torque-Drive
K = McKinnon 3-speed C = Cleveland Powerglide
H = 69 Muncie HD 3-speed T = Toledo Powerglide
R = 4-speed Saginaw B = Cleveland TH350
P = 4-speed Muncie X = Cleveland TH350
Y = Toledo TH350

y = model year (not calendar year)
m = month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
--- --- --- --- --- --- --- --- --- --- --- ---
A B C D E H K M P R S T

dd = day of month
s = suffix
PowerGlide and TH350 (not used on all):
D = day shift
N = night shift
1969 Muncie 3-speed
B = 2.42 first gear ratio
1969 Muncie 4 speed only:
A = M20
B = M21 Use of the Muncie type suffix
C = M22 began with 21 Oct 68 production.

Examples:

R7S21 Saginaw 4-speed, Nov 21, 1966
P8R01 Muncie M2x 4-speed, Oct 01, 1967
P9T11B Muncie M21 4-speed, Dec 11, 1968
C9D14N PowerGlide M35 2-speed auto,
Apr 14, 1969, night shift

yours is P7H14

P = 4-speed Muncie
7 = 1967 MODEL year vehicle
H = June
14 = day, June 14

the 7A vin = 1967 Atlanta, Georgia built vehicle

[Tommy]

[ QUOTE ]

yours is P7H14

P = 4-speed Muncie
7 = 1967 MODEL year vehicle
H = May
14 = day, May 14

the 7A vin = 1967 Atlanta, Georgia built vehicle

[/ QUOTE ]


Thanks a bunch .It should work nicely in the 67 Camaro project.


Tommy

[Musclecarkid]

Tommy, Those 2 rings on the imput shaft make your Muncie a M20 wide ratio trans. M21 would have only one ring. I believe early 60's Muncies didn't have these ID rings.

[L72Chevelle]

Two grooves on input is M20 gearbox, M21 would have one groove.

[Tommy]

Thats good, thanks for clearing that up for me. I plan on running a 3:55 in the camaro so the M20 will be a good trans for that ratio.


Tommy