Sierra Rear Trailing Arms

[jimpoole]

The rear trailing arms from my Sierra donor were completely rotten, so I bought a pair of arms in better condition from a drum brake car. Unfortunately after having them all powder-coated I've just found out that the 100 mm diameter CV joints and stub axles won't fit the arms.

I'm, therefore, looking for a set of rear trailing arms from a disc brake car. I think it will have to be one of the later models as well so that the 100 mm driveshaft joints fit. 

Edited July 12, 2019 by jimpoole

[blue]

Hi in what way do they not fit ??  

[richyb66]

The outside diameter of the cv joint catches on surface of the arm. Tripod joints should fit all arms then the lobro joints come in 100 and 108mm diameters. I thought that 100mm joints fit all arms but obviously not. 

[jimpoole]

Yes, with the drum brake arms I've got the cv joint catches on the surface of the arm and you can't insert it fully or it locks it up.

I thought I must have had 108 mm joints but a quick check and they measure 100 mm diameter.

Edited July 12, 2019 by jimpoole

[Peter Bell]

Many years ago someone, Chris Brown? did an article on fitting disc brakes to drum brake arms, it may have involved a large hammer.

[Grim]

Big Jim recommended the percussive modification technique here: http://nw.rhocar.org/lsd.htm 

 

[richyb66]

Works well when the part isn't powder coated. 

[jimpoole]

Thanks Gents - The tapometer technique worked!