Re: [Amc-list] Vibration in '63 American 440-H

[Joe Fulton <piper_pa20@xxxxxxxxxxx>]

AS Tom J. said it could be related to a bent wheel,
worn u-joint of some other driveline problem.

I chased a vibration in my 77 Gremlin and found at
least two causes.  Both "fixes" helped some and now
the vibration (at 55 to 65 mph) is almost gone.

There was a bent wheel on the rear, which I replaced.
The driveshaft was also professionally balanced in a
local driveline shop.  At the same time, the shop
replaced the rear u-joint.  

On another car (80 AMC Spirit) relacing a bent
flexplate helped solve a driveline vibration.

You can easily check for a bent wheel by jacking up
the car and putting a fixed pointer (or dial
indicator) on/near the edge of the rim and watch for
in/out movement (runout) as you rotate the wheel.

If you suspect the driveshaft is out of balance, I
suggest you have it balanced professionally, although
some of the later TSMs explain how to mark a low spot
and balance it with radiator hose clamps.

Joe Fulton
 
--- javelindreams <javelindreams@xxxxxxxxxxxx> wrote:

> Hi all...new member to the list here...
> 
> I have a question, but I'll give everyone some
> background first. We have a
> '68 Javelin SST that just received a "rolling
> restoration"; body/paint, new
> engine (street mod '70 304) and trans ('70 T35 auto)
> and new interior. We
> also have a 71 AMX w/go pack & 401, red on red. The
> '71 is on a rotisserie
> right now undergoing a 100% restoration. Anyway,
> that's our AMC line up...or
> it was until tonight... We just drove home our
> newest addition; a '63
> American 440-H with twin-stick, all original, red
> w/white top & red
> interior...cute little bugger. He (the last owner
> was a lady who swore its a
> he) has some vibration between 40 and 55 mph.
> Smooths out a bit at 60.
> Vibration seems to be in the chassis - don't feel
> any in the steering wheel.
> Since I'm new to this car, I'm just guessing, but
> I'm thinking drivetrain -
> possibly driveshaft or rear end?
> 
> Thanks in advance for any input.
> 
> Javelindreams
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