64 to 65 trailing arm interchange?

[Stan E.]

Is it posible to interchange 64 drum brake and 65 disc brake trailing arms with modification? What modification is necessary? Are they the same length?

[Joe L.]

Re: 64 to 65 trailing arm interchange?

Is it posible to interchange 64 drum brake and 65 disc brake trailing arms with modification? What modification is necessary? Are they the same length?

Stan------


The last set of SERVICE trailing arms available from GM were the same for both drum and disc brake applications. However, I just don't recall what the original differences were. It might have had something to do with the parking brake or brake line brackets.

[John H.]

Re: 64 to 65 trailing arm interchange?

Is it posible to interchange 64 drum brake and 65 disc brake trailing arms with modification? What modification is necessary? Are they the same length?

Stan -

They're the same length, but the '65-up trailing arms have a separate pad welded on the top surface to contact the jounce bumper, which was moved inboard from its original '63-'64 location outboard of the frame with the advent of disc brakes in '65, and there are several other minor bracket differences. Photo below is a LH '65-up arm.



TrlgArmInboard4 (2).jpg

[Wayne M.]

Re: 64 to 65 trailing arm interchange?

Stan -

They're the same length, but the '65-up trailing arms have a separate pad welded on the top surface to contact the jounce bumper, which was moved inboard from its original '63-'64 location outboard of the frame with the advent of disc brakes in '65, and there are several other minor bracket differences. Photo below is a LH '65-up arm.



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Here's another view of the pad and you can see the off-set jounce rubber bumper above and in line with the trailing arm pad, attached to the frame.



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[Stan E.]

Re: 64 to 65 trailing arm interchange?

Thanks everyone. I'm trying to solve an alignment problem and I remember changing one and but having to remove a bracket. This must not be the problem. Thanks again! stan 19259