Ford Model A Rear Axle Specifications
Type: Three Quarter Floating
Material: Special Ford Carbon Manganese Steel
Gear Ratios:
- 3.78:1
- 3.70:1 (early 28’s)
- 3.54:1
- 4.11:1
Bearings:
- Rear Wheel:
- O.D. of Axle Housing Race – 2.061″ to 2.0635″
- I.D. of Wheel Hub 3.188″ to 3.190″ – Max Wear 3.185″
- Pinion Bearing:
- Timken 28156 (2 each) – Double Taper Roller Type
- Bearing Cup: Timken 28317
Ring Gear:
- 8.4″ Pitch Diameter
- 1 3/16″ Wide Teeth
Axle Shaft:
- 1 1/8″ Diameter
- 1.128″-1.130″ at Wheel Bearing
Dimension From Housing Flange to bearing Shoulder in Axle Housing:
- Before 1929: 1.370″ to 1.372″
- After: 1.365″ to 1.367″
Axle and Drive Shaft Seal: CR 10926
Rear Axle Seal: CR 20112, Victor 49024
Differential Lube: 600W to 160W
Differential Oil Capacity: 2 1/4 Pint
Torque Specs:
- Axle Nut Torque: 100 ft/lbs
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