Re: vibration at 65 mph?

From: "Jim Altemose" <jaltemoose@xxxxxxxxx>
To: 1962to1965mopars@xxxxxxxxxxxxxxxx
Sent: Thursday, July 14, 2011 8:03:18 AM
Subject: vibration at 65 mph?

On my 63 Polara 500 I recently replaced my front drums, brakes and
bearings. I'm now getting a 'vibration' between about 62 and 68 mph.
On my recent 500 mile journey to Carlisle I had plenty of chance to
feel the symptom. Up until 60 mph, the car is smooth as silk. At
about 62 and up to 68 or 70, I get a noticeable, general vibration.
It's not terrible and doesn't feel damaging or unsafe, but it's enough
to be annoying. From 70 to 80, it lessens and is barely noticeable
and much more tolerable. Here's the sequence of things I've done:

1. Old tires, old drums, etc. - Smooth at every speed.
2. Replaced front hubs, drums, shoes, springs, bearings. Used what I
think are high quality American made brand new drums and Timken
bearings. This is when the 65 mph vibration became noticeable,
including with the old tires.
3. Replaced the old tires with new BFG radial T/A. Still vibrates.
The new tires and wheels were balanced.
I'd recheck the wheel balance IF you are feeling it through the steering wheel, it's the front tires. If you are feeling it through the seat, it's coming from the rears. You can check this by rotating the tires front to rear, see if the vibration changes. Worn front end parts will also cause this, but since you didn't feel it before, I would discount this for now.

Another thing that will cause this is a tire being out of round, but that generally shows up through all speeds. Vibration just in one speed range... generally wheel balance.

/Butch/Ferndale, WA

The control arms and bushings and such are all old and worn; that may
be next Spring's project. The shocks are old and I'm going to replace
them soon.

What are some things to look for and what corrective actions can I
take? Should I have an alignment done? Is there a way to balance the
drums with or without the wheels and tires?

As always, thanks.

- Jim
Jim Altemose, Long Island, NY
'63 Polara 500 (Max Wedge)
'63 Polara 500 (383)
'65 Belvedere I (Street Wedge)
'71 Bronco

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