I decided to make these up after reading a thread
about live axle handling and they were mentioned. At the
time, I needed a project so decided to give them a try and
see if they made a difference.
I ordered a pair of smaller 3/8" spherical bearings
for the car end, a pair of larger 1/2" bearings for
the axle end. I also got a couple of lengths of tubing and
threaded inserts to suit the 1/2" bearings. I ordered
the 1/2" bearings with left hand threads so I could
adjust the length of the radius arms easily, along with
matching locknuts. I then got a friendly engineering company
to shorten the tubes and to make up a couple of threaded
inserts to suit the 3/8" bearings and the tube diameter.
The final result was then powder coated in black to protect
Fitting the new arms was a simple case of unbolting the
standard items and the offering up the new ones with he
old ones still fitted. It was at this point that I adjusted
the length of the arms to match the old ones and then swapped
them over on the car.
My initial drive showed that the car really felt a lot better
over a bumpy road and I was able to drive comfortably 7-8mph
faster (on a national speed limit road).
I was very pleased with the improvement that the new radius
arms gave, and I ran them for the remainder of the year.
They were on the car when we went over to Spain and during
the trip I started to notice a slight knocking/rattling
noise when traveling over bumps when traveling at around
30mph. When I returned home I had a good poke around at
the back of the car and found that both of the 1/2"
bearings had developed some play and it was this that I
could hear over the bumps. I swapped back to the old radius
arms and went for a test drive and the noise was all gone.
I found some higher specification bearings and had to wait
a while for them to arrive. I swapped them back over again
and ran them again but this time they lasted even less time
before I heard the knocking noise return. The old originals
were swapped back on and they will remain on the car as
the high specification bearings are too expensive to keep
Worth a try.
Fitted to Car
(with rubber boots)