Thread: Radius arm interchangeability

Some time in the late 80' s there was a change in bush size it can't remember if it was diameter or width (width I think) but believe the arms are the same.
Someone should be able to confirm that.

Cheers….I was under the same impression…I think the latter bushes are wider
Hopefully someone has a measurement

Hi,

The difference is in width. Can't remember if they got wider or narrower........... I'm thinking narrower............ more articulation.

Also .......... I've used SuperPro for a long time now and actually have a tool that was machined in 5 mins to press the one piece bushes in (using a bench vice.......... easy as), 20 years ago, in 74 RRC radius arms.

Pretty sure the new ones I have in a packet are 2 piece, but they're different arms, front diff is braced County, MD everything, County CV's, just got to find time to slot the swivels and get rid of the stoopid caster correction bushes that came with the arms.

Not much help, but I think the width change was done with the flanges on the diff and all the radius arms are the same.

cheers, DL

Originally Posted by 350RRC

Hi,

The difference is in width. Can't remember if they got wider or narrower........... I'm thinking narrower............ more articulation.

Also .......... I've used SuperPro for a long time now and actually have a tool that was machined in 5 mins to press the one piece bushes in (using a bench vice.......... easy as), 20 years ago, in 74 RRC radius arms.

Pretty sure the new ones I have in a packet are 2 piece, but they're different arms, front diff is braced County, MD everything, County CV's, just got to find time to slot the swivels and get rid of the stoopid caster correction bushes that came with the arms.

Not much help, but I think the width change was done with the flanges on the diff and all the radius arms are the same.

cheers, DL

Yea some help…..I’ve thought I’ve seen both SuperPro one and two peice radius arm bushes…..so
Two peice wouldent be an issue.
I did the bigger ones on the back with a similar thing…….a tin ring and jubilee clips [think piston ring compressor]

Originally Posted by mfc

Yea some help…..I’ve thought I’ve seen both SuperPro one and two peice radius arm bushes…..so
Two peice wouldent be an issue.
I did the bigger ones on the back with a similar thing…….a tin ring and jubilee clips [think piston ring compressor]

I wuz wrong.

The front radius arm to diff bushes got wider as the years went by. The ones I have in a packet are one piece.............I must have been thinking back to the Pedders ones that were on my POS when I bought it.

The kit just for the arms to diff bushes I'm using is SPF 0126K............. crush tube length is 48mm. No diameter specified, but they measure 50mm with the verniers

Suits Def 83 - 90 (KA) and RRC 69 - 86.


Kit 01803K suits Def 1990 - 2007 on. (LA onwards), RRC 87 - 95, Disco 89 -95.

Length 53mm, Dia 50mm.

Dunno if the Def radius arms got thicker or not, but most parts places list different radius arm part numbers for KA vehicles compared with LA onwards.

RRC and Disco radius arm part numbers are different again.

cheers, DL

Yea I thought thicker and metric nut………99.5% certain that d1 and defender are the same…..kinda thining lane rrc is the thicker arms to
Although looking at SuperPro they list both split and bob in style.
Split would be handy to fit