Matt Gieselman | M37 Steering Knuckle Rebuild

M37 Steering Knuckle Rebuild

I started with gathering parts and information, this link from Paul’s rebuild has lots of good info.  Vermont Salvage no longer carries any of the knuckle parts and sold his remaining stock to Midwest Military so that’s where I got knuckle seal and axle bushings.  I ordered the bearings and races from Rock Auto.

Parts and Supplies:

  • Tapered Bearing (Timken 23100 x 4, $16 ea)
  • Bearing Race (Timken 23256 x 4, $10 ea)
  • Inner Axle Seal (NAPA 14864 x 2, $8 ea)
  • Axle Shaft Seal I.D. : 1.5"
  • Axle Shaft Seal O.D. : 2.066"
  • Axle Shaft Seal Width : .313"
  • 5 lb Premium Grease (I used Royal Purple UPG)

If you are replacing hardware:

S – 1/2” x 1 1/4” – 13 (Self locking steering arm bolts x 4)
AA – 1/2” x 1” - 13 (Lower bearing cap bolts x 4)
EE – 1/2” x 2” – 20 (Upper and lower flange bolts x 4)

Tools Needed:

Split bearing puller. (Harbor Freight had the same kit as others for less.)
Slide hammer puller. (Any puller that can pull from the inside would work just as well, the OTC 6540 worked great.)

Axle Diagram:

Front Axle

Wear Tolerances:

FF – Axle Bushings 1.519 to 1.521 with 1.526 being the wear limit.

Torque Values:

EE – 80-85 ft/lbs
S, AA – 60-80 ft/lbs

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