Drivers side steering arm pictures. May not need the passengers side with the ross steering system on the m39sI don't see where I would need that on a M54 truck. as long as the drivers side steering arm is the same.
The M39/M809-series and M939/M939A1-series hubs are dissimilar. The latter are narrower on the spindle housing.Steering components on the axle you have can be swapped to an air brake axle.
M39 and m939a0/1 axles share the same hub, bearing,seal setups.
Different drums, backing plates, and of course air tubes and brakes.
So basically find drums. Brakes. Backing plates etc for both sides. Or just swap in an axle and swap the steering arm on the axle.
M39 manuals are horrible. Took me a bit to piece Everything together of what was the same and wasn't
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