AUTOMATIC TRANSMISSION IDENTIFICATION
PONTIAC
Tempestorgue
1962
1
Code Prefix
1963
2
Code Prefix
on governor
Super Hydra-Matic
3
1962-64
1964
High Output Engine
Roto Hydra-Matic 375
4
1962
1963
4 Bar. carb
Tri-Power, Police
4 Bar. carb
4 Bar. carb Heavy duty
1964
Heavy duty
2 Bar. carb, High compression
Export
2 Bar. carb, Low compression
4 Bar. carb, Catalina
4 Bar. carb, Grand Prix
Catalina
High Output Engine
Low compression, Heavy duty
Heavy duty
Tempest/ Pontiac Two Speed
5, Buick Super Turbine 300
1964
1965
Air cooled
Air cooled
Water cooled
Water cooled
High Output Eng
G.T.O
1966
1967
1 Bar carb
1 Bar carb
4 Bar carb
4 Bar carb
2 Bar carb
1 Bar carb, A/C
4 Bar carb
2 Bar. carb
G.T.O
4 Bar carb
A/C, A.I.R
A/C, A.I.R
1968
1969
1 Bar carb.
W/ 1 Bar carb Tempest
4 Bar carb
W/ 1 Bar carb., A/C Tempest
1 Bar carb. A/C
W/ 1 Bar carb Firebird
1 Bar carb. Firebird
W/ 1 Bar carb., A/C Firebird
4 Bar carb Firebird
2 Bar. carb.
2 Bar. carb.
2 Bar. carb. A/C
4 Bar. carb.
2 Bar. carb. A/C
1970
(1970-1973)*
Tempest
Catalina
GM Turbo Hydra-Matic /375/400
4, Buick Super Turbine 400
1965-66
1967
2 Bar. carb
4 Bar. carb
4 Bar. carb
4 Bar. carb Grand Prix
Exc. 2+2
Heavy duty
1968
G.T.O 4 Bar. carb
2 Bar. carb.
G.T.O 2 Bar. carb
4 Bar. carb Grand Prix
1969
Ram Air GTO, Firebird
2 Bar. carb. Firebird, Tempest
2 Bar. carb.,GTO
H.O., Firebird, Tempest
4 Bar. carb., GTO, Firebird
2 Bar. carb.
4 Bar. carb., A/C, Firebird
2 Bar. carb., GTO, Grand Prix
Heavy duty
4 Bar. carb., Grand Prix
Single Exhaust
4 Bar. carb., GTO, Firebird
4 Bar. carb. High Perf.
Ram Air GTO, Firebird
1970
H.O.
Pontiac
Bonneville
Ram Air GTO
H.O. Grand Prix
Tempest, Grand prix
1971
4 Bar. carb., Grand prix
Pontiac
2 Bar. carb., Firebird
Pontiac
Sport option
2 Bar. carb., Police & HD
Ram Air H.O.
2 Bar. carb., GTO, LeMans,Firebird
Exc.H.O. Pontiac
4 Bar. carb., GTO, LeMans, Firebird, Grand Prix
H.O. Pontiac
4 Bar. carb., GTO, LeMans,Firebird
Heavy duty Pontiac
Pontiac
H.O. Tempest, Grand Prix
4 Bar. carb., Dual Exhaust Pontiac
Pontiac
4 Bar. carb., Police &HD
H.O. GTO, LeMans,Firebird
1972
4 Bar. carb., GTO, LeMans,Firebird
Wagons
4 Bar. carb., GTO, LeMans, Firebird,
Grand Prix
4 Bar. carb.
1973
2 Bar. carb.
2 Bar. carb. Pontiac
4 Bar. carb., LeMans, Firebird
2 Bar. carb. Wagons
2 Bar. carb., LeMans,Firebird
4 Bar. carb. 6
4 Bar. carb., Grand Prix
4 Bar. carb. Pontiac
2 Bar. carb., Pontiac
2 Bar. carb. Pontiac Exc.Wagons
4 Bar. carb., Pontiac
4 Bar. carb., LeMans, Firebird, Grand Am
H.O. LeMans,Firebird
2 Bar. carb., LeMans, Firebird, Grand
Am
4 Bar. carb., Grand Prix, LeMans
4 Bar. carb., Grand Prix
4 Bar. carb., Pontiac
4 Bar. carb., Police
SD LeMans, Firebird, Grand Am
1974
4 Bar. carb., LeMans, Firebird, Grand Am
2 Bar. carb. Wagons
1974
4 Bar. carb. Police & HD
4 Bar. carb., LeMans, Firebird CA
4 Bar. carb., Pontiac
4 Bar. carb., Grand Prix
2 Bar. carb., Pontiac Exc. CA
4 Bar. carb., Pontiac
2 Bar. carb., Pontiac CA
4 Bar. carb., Police
4 Bar. carb., LeMans, Firebird Exc.
CA
SD Firebird
4 Bar. carb., LeMans, Firebird CA
4 Bar. carb.,LeMans,Grand Prix
2 Bar. carb., LeMans, Firebird Exc. CA
4 Bar. carb., Firebird
Turbo Hydra-Matic /250/ 350/ 375B
7
1969
1970
1 Bar carb Tempest
Tempest
1 Bar carb Firebird
Tempest
4 Bar carb Tempest
Catalina
4 Bar carb Firebird
1972
2 Bar. carb., Firebird, Tempest
1971
Exc. Below
1974
Catalina
Firebird, LeMans
1973
Ventura
2 Bar carb, W/2.73 or 2.93 rear axle late
2 Bar carb
W/3.08 rear axle late
W/2.93 rear axle late
W/3.08 rear axle late
1- Not interchangeable. Primary difference are found in the governor, TV spring, Pressure regulator, and downshift timing valve.
2- Not interchangeable. Primary difference are found in the number of plates in the clutch pack, valve body, and modulator.
3- Prefix and serial # located on plate on lower left corner of case rear face.
4- Prefix, year, and serial # located on plate on left side
5- Prefix, year and serial # located on; 1964-65 Metal tag, 1965-67 Stamp on servo cover
6- Late production 1973 Pontiac trans have a # 2 between codes letters
7-Production day, shift built, transmission model and model year are stamped on the 1-2 accumulator cover in the middle right side of case
A/C- Air Condition
A.I.R -Air Injection Reactor
* 1970-73 all are Chevrolet Powerglides.
No ID code 71-73. Use serial # for parts ordering. Unit number located on right rear vertical oil pan surface.
The transmission code decoder reveals the transmission type, engine displacement, plate location and configuration.