The Stovebolt Site Forums The Parking Lot Big Bolts '51-'53 G.M.C. Tandem Truck

It looks like a Hendrickson walking beam rear suspension.

The vacuum chamber on the front axle could be for the differential lock. It could have a two speed...but I didn't see a control on the shifter in the cab for it. Tandems have a differential lock from the front to the rear axle the same way a single axle may have posi-traction. otherwise one spinning wheel would stop the truck from moving....granted even with it you only get the chance to spin two before you stop.

The radius arms are needed as the axles are attached to the suspension beam at the bottom and the arm keeps the axles from rotating.

It does look like a nice truck, hopefully somebody decides to get it going again....definitely uncommon for a tandem on such a light truck.

Tad