1968 Fullsize Pontiacs with a M-40 (Turbo 400)

Information supplied by George Pearson
1968 Fullsize Pontiacs Speedometer Gear Usage Chart (Turbo 400)
  Driven Gear or Gear & Sleeve Tire Size Speedometer Adapter      
Axle Ratio Part # Teeth Color 8.25 x 14 8.55 x 14 8.85 x 14 215R X 15 8.45 x 15 H70 X 15 9.00 X 15 Model Ratio Part # Color Fitting & seal Assy Transmission code Drive gear teeth
2.29 1359270 36 WHITE X         X           1362294 PB 21
2.29 9780628 35 PINK   X X X X             1362294 PB 21
2.41 1359272 38 BLUE X         X           1362294 PB 21
2.41 1359271 37 RED   X X X               1362294 PB 21
2.41 1359270 36 WHITE         X             1362294 PB 21
2.41 1359270 36 WHITE X         X           1362294 PD 20
2.41 9780628 35 PINK   X X X X             1362294 PD 20
2.56 1359273 39 BROWN   X X X X             1362294 PB 21
2.56 1362048 40 BLACK           X           1362293 PB 21
2.56 1359271 37 RED   X X X X             1362294 PG-PD 20
2.56 1359272 38 BLUE           X           1362294 PG-PD 20
2.56 9780628 35 PINK X         X           1362294 PA-PC 18
2.56 1359272 38 BLUE   X X X       777-S 1.1250 540474 NONE 1362294 PA-PC 18
2.56 1359271 37 RED         X     777-S 1.1250 540474 NONE 1362294 PA-PC 18
2.73 1362196 43 PURPLE X         X           1362293 PB 21
2.73 1362049 42 GREEN   X X X               1362293 PB 21
2.73 1362195 41 YELLOW X       X X           1362293 PB-PG-PD 21-20
2.73 1362048 40 BLACK   X X X               1362293 PG-PD 20
2.73 1359273 39 BROWN         X             1362294 PG-PD 20
2.93 9775187 45 LT BLUE X X X X   X           1362293 PB 21
2.93 9780470 44 DK GREY X       X X           1362293 PB-PG-PD 21-20
2.93 1362196 43 PURPLE   X X X               1362293 PG-PD 20
2.93 1362049 42 GREEN         X             1362293 PG-PD 20
2.93 1359272 38 BLUE   X X X X             1362294 PA-PC-PH 18
2.93 1362048 40 BLACK X         X           1362293 PA-PC-PH 18
2.93 1359271 37 RED             X         1362294 PH 18
3.08 1359271 37 RED X         X   777-S 0.7692 535615 YELLOW 1362294 PB 21
3.08 1359270 36 WHITE   X X X X     777-S 0.7692 535615 YELLOW 1362294 PB 21
3.08 9775187 45 LT BLUE X X X X   X           1362293 PG-PD 20
3.08 9780470 44 DK GREY         X             1362293 PG-PD 20
3.08 1362049 42 GREEN X         X           1362293 PA-PC-PH 18
3.08 1362048 40 BLACK   X X X X             1362293 PA-PC-PH 8
3.23 1359273 39 BROWN X         X   777-S 0.7692 535615 YELLOW 1362294 PB 21
3.23 1359272 38 BLUE   X X X X     777-S 0.7692 535615 YELLOW 1362294 PB 21
3.23 1359271 37 RED X         X   777-S 0.7692 535615 YELLOW 1362294 PG-PD 20
3.23 1359270 36 WHITE   X X X X     777-S 0.7692 535615 YELLOW 1362294 PG-PD 20
3.23 9780470 44 DK GREY X         X           1362293 PA-PC-PH 18
3.23 1362195 42 GREEN   X X X X             1362293 PA-PC-PH 18
3.42 1362195 41 YELLOW X         X   777-S 0.7692 535615 YELLOW 1362293 PB 21
3.42 1362048 40 BLACK   X X X X     777-S 0.7692 535615 YELLOW 1362293 PB 21
3.42 1359273 39 BROWN X         X   777-S 0.7692 535615 YELLOW 1362294 PG-PD 20
3.42 1359272 38 BLUE   X X X X     777-S 0.7692 535615 YELLOW 1362294 PG-PD 20
3.42 9775187 45 LT BLUE X X X X   X           1362293 PA-PC-PH 18
3.42 9780470 44 DK GREY                       1362293 PA-PC-PH 18
3.55 1362196 43 PURPLE X         X   777-S 0.7692 535615 YELLOW 1362293 PB 21
3.55 1362049 42 GREEN   X X X       777-S 0.7692 535615 YELLOW 1362293 PB 21
3.55 1362195 41 YELLOW X       X X   777-S 0.7692 535615 YELLOW 1362293 PB-PG-PD 21-20
3.55 1362048 40 BLACK   X X X       777-S 0.7692 535615 YELLOW 1362293 PG-PD 20
3.55 1359273 39 BROWN         X     777-S 0.7692 535615 YELLOW 1362294 PG-PD 20
3.55 1359271 37 RED X         X   777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.55 1359270 36 WHITE   X X X       777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.55 9780628 35 PINK         X     777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.55 9780470 44 DK GREY             X         1362293 PH 18
3.73 1362196 42 PURPLE X         X   777-S 0.7333 535614 RED 1362293 PB 21
3.73 1362049 42 GREEN   X X X       777-S 0.7333 535614 RED 1362293 PB 21
3.73 1362195 41 YELLOW         X     777-S 0.7333 535614 RED 1362293 PB 21
3.73 1359273 39 BROWN X         X   777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.73 1359272 38 BLUE   X X X       777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.73 1359271 37 RED         X     777-S 0.7692 535615 YELLOW 1362294 PA-PC-PH 18
3.73 1362196 43 PURPLE X         X   777-S 0.7692 535615 YELLOW 1362293 PG-PD 20
3.73 1362049 42 GREEN   X X X       777-S 0.7692 535615 YELLOW 1362293 PG-PD 20
3.73 1362195 41 YELLOW         X     777-S 0.7692 535615 YELLOW 1362293 PG-PD 20
Information supplied by George Pearson, taken from a Pontiac Parts Book