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Filthy Motorsports: Store > GM 55P / 55T
GM 55P / 55T Axle Parts, Gears, and Upgrades

GM 55P / 55T Axle Models:

GM 55P (8.400") (Passenger Car)
GM 55T (9.375") (Truck)

Axle Specifications:

Ring Gear Diameter: 8.400 / 9.375
Diff Cover Bolts: 10
Ring Gear Bolts: 10 /12
Axle Spline Count: 17
Axle Shaft Style: Semi-Floating
C-Clips: No
Pinion Support: No
Pinion Nut: 1-1/8"
Pinion Crush Sleeve: Yes
Carrier Breaks: 55P: 3.73 / 4.10
55T: No
Dropout Carrier: Yes

Torque Specifications:

Pinion Preload New: 14 to 18 in-lbs
Pinion Preload Reused: 6 to 8 in-lbs
Ring Gear Backlash: .006" to .010"
Ring Gear Bolt Torque: 55 ft-lbs
Carrier Bearing Caps: 60 ft-lbs

Popular Applications:

Chevy Bel Air 1955 - 1964 Rear
Chevy Corvette 1956 - 1962 Rear
Chevy Impala 1957 - 1964 Rear
Chevy Nova 1962 - 1964 Rear
Chevy C10 / C15 1960 - 1964 Rear
Chevy Suburban 1960 - 1964 Rear
GMC K10 / K15 1960 - 1964 Rear

Axle Images:

Note: GM 55P (passenger) and GM 55T (truck) axles use different gears.

Axle Details

The GM 55P and 55T axles where used by Chevy between 1955 and 1964 before being replaced by the GM 12 Bolt 12P and 12T axles, respectively. While they may look similar from the outside, the internal components, including ring and pinion gears are not interchangeable so make sure that you know which model you have before ordering parts.
Don't see the particular axle or drivetrain parts you need? We carry more products and brands than we can make available on this website so give us a call or send us an email and chances are we can get what you need at a great price.