Rockwell 2.5 Ton (HX-240) Axle Parts, Gears, and Upgrades
Axle Specifications:
Ring Gear Diameter:
10.25"
Ring Gear Bolts:
8
Axle Spline Count:
16
Axle Shaft Diameter:
1.56" / 1.62"
Axle Shaft Style:
Full Float
Pinion Support:
Yes
Pinion Adjustments:
Shims
Pinion Flange:
1480 U-Joint
Gear Ratio:
6.72:1
Dropout Carrier:
Top Loading
Bolt Pattern:
6 x 8.75"
Axle Dimensions and Weights:
Front WMS to WMS:
69.5" or 79.5"
Rear WMS to WMS:
69.5" or 79.5"
Front Axle Weight:
690 lbs. w/o brakes
Rear Axle Weight:
690 lbs. w/o brakes
Center Chunk Weight:
215 lbs. loaded
Center Chunk Height:
9.5" above axle tube
Popular Applications:
M35A2 2.5-Ton Truck
1951 +
F / R
Axle Shaft Types:
U-Joint Axle Shafts:
3,600 lb. Static Load (Est.)
Convel Joint Shafts:
4,300 lb. Static Load (Est.)
Rezepa Joint Shafts:
3,200 lb. Static Load (Est.)
Axle Images:
Axle Details
The 2.5 Ton Rockwell axle, available in steering and solid axle configurations is a bomb-proof axle with many unique features. As standard equipment on Kaiser M35 series 2.5 Ton trucks, Rockwell axles are built to military specifications and, while extremely heavy, they are very well engineered and quite easy to work on. Their signature feature is a top-loading, drop-out style 3rd member that houses large double reduction gears and a pass-through pinion shaft. A 6.72 to 1 overall gear reduction, massive 1.56" diameter axle shafts, plentiful availability, and a healthy aftermarket are making these axles a popular choice for many off-roaders.
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