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Speedometer Pinion Gear Chart
Contributed by Steve Knickerbocker

 

Source: 1972 Dodge FSM

Speedometer Pinion Gear Chart
All Car Lines - All Transmissions
Number of Teeth on Pinion Gear Listed Under Each Axle

Tire
Size     2.45  2.71  2.76  2.93  2.94  3.21  3.23  3.54  3.55  3.91  4.10 
B78x14    27    29    30    32    32    35    35    38    38    42    44 
C78x14    26    29    29    31    31    34    34    37    37    41    43 
D78x14    26    28    29    31    31    33    34    37    37    41    43 
E78x14    25    28    28    30    30    33    33    36    36    40    42 
F78X14    25    27    28    30    30    32    33    36    36    39    41 
G78x14    24    27    27    29    29    32    32    35    35    39    40 
H78x14    24    26    26    28    28    31    31    34    34    37    39 
F78x15    24    27    27    29    29    31    32    35    35    38    40 
G78x15    24    26    27    28    28    31    31    34    34    38    39 
H78x15          26    26    28    28    30    30    33    33    37    38 
J78x15          25    26    27    27    30    30    33    33    36    38 
L84x15          25    25    27    27    29    29    32    32    35    37 
E70x14    26    28    29    31    31    34    34    37    37    41    43 
F70x14    25    28    28    30    30    33    33    36    36    40    42 
G70x14    25    27    28    30    30    32    33    36    36    39    41 
H70x15    24    26    26    28    28    31    31    34    34    37    39 
E60X15    25    28    28    30    30    33    33    36    37    40    42 
F60x15    25    28    28    30    30    33    33    36    36    40    42 
G60x15    25    27    28    29    29    32    32    35    35    39    41 
6.45x14   26    29    29    31    31    34    34    37    38    42    44 
6.95x14   25    28    29    30    30    33    33    37    37    41    42 
7.35x14   25    27    28    30    30    32    33    36    36    40    42 
7.75x14         27    28    29    29    32    32    35    35    39    41 
8.25x14   24    27    27    29    29    32    32    35    35    38    40 
8.55x14   24    26    26    28    28    31    31    34    34    37    39 
7.75x15   24    27    28    29    29    32    32    35    35    39    41 
8.25x15   24    26    27    28    29    31    31    34    34    38    40 
8.55x15         26    26    28    28    31    31    34    34    37    39 
8.90x15               24    25    25    28    28    30    30    33    35 
9.00x15         24    25    26    26    29    29    32    32    35    37 
9.15x15         25    26    27    27    30    30    33    33    36    38 

Note: Pinions with less than 26 teeth require a different adapter than the one used for all other pinions.

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