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Posts Tagged ‘chassis’

Overload Rear Bumpers

Thursday, February 11th, 2010

To help prevent metal to metal contact when 1/2 and 3/4 tons are overloaded or have weak shock absorbers, truck manufacturers used a rubber devise. This cushion prevents the axle from making direct contact with the frame rails.

On the rear of the 1947-1953 GM pickups, it attaches directly to the underside of the hump in the frame. It is not meant to be removed during the life of the truck.

In 1954 a change in the overload bumper location was necessary. This was the first year for a redesigned step bed which was three inches deeper. To keep the top edge of this new bed the same as earlier years, the hump in the frame was lowered. It was necessary to place a bracket on the side of the frame rail and add this bumper. The attached photo shows this repositioning of the overload bumper.

overload rear bumpers 1

1947-1953 (above)

overload rear bumpers 2

1954-1955 (above)

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Suburban Frames

Thursday, February 11th, 2010

Over the years we have been asked ‘Where can we locate the chassis frame for a Suburban or panel truck?’ The answer is not complicated. To save much money General Motors used a modified frame from a pickup. The difference is four right angle brackets riveted to the frame. These provide an attaching point for the large single unit body (Suburban and panel truck).

On most pickups, these frame holes are even punched at the factory so the long side rails can be used for either body style. Therefore, if your Suburban or panel truck needs a frame, your hunt will be less difficult. The attached photos show body mount brackets on a 1954 as they were installed at the factory.

suburban frames 1

suburban frames 2

suburban frames 3

suburban frames 4