1966 Fullsize Speedometer Gear usage Chart |
|
Driven Gear Or Sleeve |
Tire Size |
Speedometer Adapter |
|
Rear End Ratio |
Part # |
Teeth |
Color |
8.25 x 14 |
8.55 x 14 |
8.45 X 15 |
8.15 X 5 |
Model |
Ratio |
Part # |
Color |
Fitting & Seal Assy |
4.11 |
9780522 |
18 |
GREEN |
X** |
X |
|
X |
6660-AJ |
.9705 |
9777006 |
RED |
3869914 |
4.11 |
9780523 |
17 |
BLACK |
|
|
X |
|
6660-AJ |
.9705 |
9777006 |
RED |
3869914 |
3.55 |
3860344 |
21 |
RED |
X |
X |
|
X |
|
|
|
|
3869912 |
3.55 |
3987920 |
20 |
BLUE |
|
|
X |
|
|
|
|
|
3869912 |
3.73 |
3860342 |
19 |
NATURAL |
X |
X |
|
X |
666-AJ |
.8653 |
9775436 |
BLUE |
3869912 |
3.73 |
3860344 |
21 |
RED |
|
|
X |
|
|
|
|
|
3869912 |
3.42 |
3987920 |
20 |
BLUE |
X |
X |
|
X |
|
|
|
|
3869912 |
3.42 |
3860342 |
19 |
NATURAL |
|
|
X*** |
|
6660-AJ |
.9705 |
9777006 |
RED |
3869912 |
3.23 |
3860342 |
19 |
NATURAL |
X |
X |
|
X |
|
|
|
|
3869912 |
3.23 |
3860341 |
18 |
BROWN |
|
|
X*** |
|
6660-AJ |
.9705 |
9777006 |
RED |
3869912 |
NOTE: X** = ADAPTER REQUIRED WITH POLICE OPTION |
NOTE: X*** = ADAPTER REQUIRED |
Information supplied by George Pearson, taken from a Pontiac Parts Book |