Four rear axle housings are used in the early Falcons. Three different size
ring and pinion gear sets.
The 6 3/4-inch gear is used only with the 2 and 4 door sedans, with
the144 cid.
The 7-inch gear is used only in taxis, Rancheros, and station wagons with
144 cid.
All models with the 170 cid used the 7-1/4 inch gear.
The sedan uses a 2.440" wheel (axle) bearing diameter.
Taxi, Ranchero, and station wagon had a 2.677" wheel (axle)
bearing diameter.
Three types of differential case are
used. The two-window type is used only in 2 and 4 door sedans with the 144
cid, and is used in this housing only with a 3.10:1 ratio. The one-window
case and the two-piece case are used in all four housings in all
combinations with various ratios.
Two sizes of differential case pinion
and side gears are used in all three cases. The side gears are not
interchangeable as between the two-window case and the other two types.
Pinion gear thrush washers are
also not interchangeable. The side gear thrush washers, however, are
interchangeable between all differential cases
|
144 CU. Inch |
|
|
|
|
|
2 AND 4 DOOR |
SEDAN |
Taxi, Ranchero, Stationwagon |
|
|
|
HOUSING |
2 RIBS
2.440-Inch Bearing Diam. |
HOUSING |
7 RIBS
2.677-Inch Bearing Diam. |
|
|
|
DRIVE GEAR |
6 3/4-Inch Diam. |
DRIVE GEAR |
7-Inch Diam. |
|
|
|
PINION BEARING |
SPACER |
1 1/2-INCH LENGTH |
PINION BEARING |
SPACER |
1 1/2-INCH LENGTH |
DIFFERENTIAL
CASE |
Type |
Ratio Used |
DIFFERENTIAL
CASE |
Type |
Ratio Used |
|
2-Window |
3.10:1 |
|
1-Window |
3.50:1
4.00:1 |
|
1-Window |
3.50:1 |
|
2-Piece |
3.50:1
4.00:1 |
|
2-Piece |
3.50:1 |
|
|
|
| |
|
|
|
|
|
|
170 CU. Inch |
|
|
|
|
|
2 AND 4 DOOR |
SEDAN |
TAXI, RANCHERO,Stationwagon |
|
|
|
|
HOUSING |
3 RIBS
2.440-Inch
Bearing Diam. |
HOUSING |
3 RIBS
2.667-Inch
Bearing Diam. |
|
|
|
DRIVE GEAR |
7 1/4-Inch Diam. |
DRIVE GEAR |
7 1/4-Inch Diam. |
|
|
|
PINION BEARING |
SPACER |
2-INCH LENGTH |
PINION BEARING |
SPACER |
2-INCH LENGTH |
DIFFERENTIAL
CASE |
Type |
Ratio Used |
DIFFERENTIAL
CASE |
Type |
Ratio Used |
|
1-Window |
3.20:1
3.50:1 |
|
1-Window |
3.50:1 |
|
2-Piece |
3.10:1
3.50:1 |
|
2-Piece |
3.50:1 |
|
|
