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AUTOMATIC
TRANSMISSION IDENTIFICATION

  
 

BUICK

Twin Turbine 1

1962                          Code Prefix
1963                            Code Prefix
ALL B 031 ALL H 031
 

Super Turbine 400 & GM Tubro Hydra-Matic / 375/ 400 2

1964                       
LeSabre V8-300 BU
V8-401 Column shift BJ
V8-401 Console shift BK
V8-425 Column shift BL
V8-425 Console shift BN
V8-425 2 Carbs Column shift BP
V8-425 2 Carbs Console shift BQ
1965                        
LeSabre V8-300 BU
V8-401 3.07 Axle BJ
V8-401 3.23 Axle BR
V8-425 3.07 Axle BN
V8-425 3.23 Axle BT
V8-425 2 Carbs 3.07 Axle BQ
V8-425 2 Carbs 3.42 Axle BS
1966
V8-340 Sport wagon 400 BW
V8-340 LeSabre BU
V8-400 G.S. 400 BA
V8-401 BR
V8-425 3 BS
V8-425 BT
V8-430 BT
   
1968
V8-350 LeSabre BU
V8-400 G.S. 400 BA
V8-400 Sport wagon 400 BW
V8-430 Wildcat, Electra, Riviera BT
   
   
1970
V8-455 G.S. 455 BA
V8-455 G.S. 455 Stage I BB
V8-455 Riviera BT
V8-455 all others BC
   
   
1972
V8-455 G.S. 455 BS
V8-455 G.S. 455 Stage I BB
V8-455 Centurion Hi Perf. BU
V8-455 Riviera, G.S. Perf. axles BT
V8-455 all others BC
1967
V8-340 LeSabre 400 BU
V8-400 G.S. 400 BA
V8-430 1 BT
V8-430 Sport wagon 400 BW
 
   
   
1969
V8-350 LeSabre BU
V8-400 Sport wagon 400 BW
V8-400 G.S. 400 BA, BB
V8-430 Wildcat, Electra BC
V8-430 Riviera BT
 
1971
V8-455 G.S. 455 BS
V8-455 G.S. 455 Stage I BB, OW
V8-455 Riviera BT
V8-455 all others BC
   
   
1973-74
V8-455 Century, Regal less Stage I BS
V8-455 Century, Regal Stage I BB
All others Hi Perf. BT
All others Exc. Hi Perf. BC
   
   
Special Dual Path Drive 4
ID consists of a letter followed by one or more digits.
 
 
Super Turbine 300 5
1964
V6-225 25
V8-300 Exc. Sportwagon 35
V8-300 Sportwagon 36
   

1966-67
V6-225 LJ
V8-300 Exc. Sportwagon MJ
V8-340 Sportwagon MR
V8-340 Exc. Sportwagon ML
V8-400 Skylark Gran Sport NK
 
 
Tubro Hydra-Matic 350 6
1969
Exc. Sportwagon JH
Sportwagon JJ
   
 
 
1- Stamped on lower edge of reaction shaft flange

2- Stamped on Id plate with year, serial #

3-Wildcat, Riviera, G.S.

4- Stamped on raised surface of case, 
forward of oil pan left side
1965
V6-225 LJ
V8-300 Exc. Sportwagon MJ
V8-300 Sportwagon MR
V8-400 Skylark Gran Sport NK
 
1968-69
All 6-250 LC
All Sportwagons MH
All V8-350 Exc.Sportwagons ME
   
   
   
   
   
1970
6-250 JE
8-350 2 Bar Carb. Exc. Lesabre JH
8-350 4 Bar Carb. Exc. Lesabre JR
8-350 2 Bar Carb. Lesabre JJ
8-350 4 Bar Carb. Lesabre JS
5- 1964-65 Metal tag
    1965-67 Stamp on servo cover

6-Production day, shift built, transmission model and model year
are stamped on the 1-2 accumulator cover in the middle right side
of case