[j williams]

My '35 pickup has a mustang II front suspension with manual rack and pinion hooked to a '39 deluxe steering column and steering wheel. Borgeson u-joints connect it all. When I start down the road there is no vibration but when I reach speeds of 45 - 60 mph vibration occurs and the steering wheel jiggles. Not violently but it is significant. I can't find anything appearing to be loose in the suspension but the shocks need replacing, which I am doing this weekend. The truck tracks down the road just fine, no pulling to left or right. I have the older Torque Thrust D wheels on the front and rear and I've been told they can cause vibrations at times so I had them balanced but no change. Is it possible the shocks can cause vibration at only certain speeds? Any other suggestions?
Thanks,
Jim

[steve t]

try having the tires shaved, but you will need to rebalance

[Pony]

I'm with Steve. It looks like a tire/wheel issue. If you can try another set of tires/wheels for a test, or even swap front to rear if size isn't an issue. Any way get something else on there and see if the problem goes away. I'm betting it will. I had a similar issue with a car a while back, I checked, double checked and nothing I did helped. I put a different set of tires/wheels on it and it was fine. Turned out there was a very slight ripple in the sidewall of the front right tire. (belts coming apart) It was very hard to see unless you were looking hard but that was the problem.. Good Luck.

[RCastle]

Just as Pony mentioned,belts comong apart in a tire will cause the symptoms you describe.Also,if you loose you balance weights on your rims,you can have a shimmy.Ha d a truck come into work the other night with a bad shake in the front end,dumb driver buried his truck in some mud and did not tell anyone,ripped the front end apart and it was full of mud.You would see that on your Torque thrust rims though,but just an example of how extra weight or no weights on a balanced tire can throw everything off.Also,if your tires are dipping anywhere from being out of alignment they can get a shimmy in them.