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chassis noise with roller perches and adjustable strut rod

2.8K views 13 replies 12 participants last post by  JSHarvey  
#1 ·
Ive got a 65 coupe with shelby dropped stock a arms, GT springs with 1/2 coil cut,roller perches, street or track strut rods, and 17" wheels. I can hear and feel clunking in the front end on bumps since adding the rods and roller perches. Is this common or do have another issue here Im missing?
 
#6 ·
If you have 65-66 style disc brakes, check to see if the caliper housing is on tight. One of mine had a loose bolt and it allowed the caliper to "clunk" as it pivoted forward or backward around the tight bolt. I don't have any clunking since, despite the roller perches, A arm drop, 17" wheels and aftermarket roller strut rod bushings (Maier Racing). Also check sway bar end links and center bolts. Make sure all the suspension is tightened.
Daniel
 
#7 ·
It could be the UCA shaft adjusting nuts. In oem condition it is common for them to be starved of lubrication, and they wear quickly. The noise associated with this is more like a low pitched squeak, kind of a grunting noise at every movement of the UCA rather than a clunk, but if it is just starting to be an issue it may sound like a clunk under abrupt suspension movements.

Try greasing the end bolts on the shaft and if that helps the noise temporarily you'll need new shafts. A simple mod to prevent this from happening again is to cut a thin grove across the threads on the underside of the shaft before screwing the nut on. This allows grease to cover all the threads inside the joint after it's assembled.
 
#8 ·
Every componenet is brand new, greased and tight and the cars got wilwood discs. It seems mostly from the right side so before I get too frustrated its going to the alignment shop again, just to be sure.
 
#9 ·
Check for clearance around the shifter at the front of the tunnel, transmission clearance in the tunnel, check for the exhaust hitting the frame, body or steering linkage. A loose rear shock, etc. It's amazing how sound can be transferred in a uni-body car.

Good luck, I know it can be frustrating to find this kind of noise.
 
#12 ·
If you get the chance to put it on a four post rack,
get under it and see if you can get a
helper to bounce the suspension. Feel for the
movement. I know that sounds crazy. I've found
noisy stuff "nobody could fix" quite a few times
that way. (including a rear thump in a Vette that
5 dealers and a traveling Chevy corporate service
guru couldn't locate)

ex-Global West GM
1991-1994
 
#13 ·
tweet66 said:
Check for clearence between the sway bar and the adjustable strut rods. My 66 rubs on the 1 1/8" sway bar so I have to go to a 1" bar. Drove me nuts until I saw the marks on the bar one day.
This happens on my 67 also, but it was rubbing just enough that the paint had rubbed off of the sway bar and strut rod. Once that metal to metal was exposed the squeaking drove me crazy until I found it. It only happened on one side.
 
#14 ·
Yes, these parts will make more noise than rubber. But you get a much better suspension, that is the trade off.

John Harvey