I'm trying to isolate the cause of drive train noise in my son's 1991
Prizm (Toyota Corolla). The best I can characterize the noise is a
whine, with a rumble component that turns to a loose clatter on
deceleration. I can hear noise from the driver's side CV as I turn the
wheel by hand. What steps (besides serial parts replacement) can I use
to determine if the noise is being generated by the CV, the wheel
bearing or (minor chords here) the transaxle?

Thanks,

Kevin Gallimore



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On Sat, 27 Dec 2003 16:35:07 -0500, axolotl
wrote:

I'm trying to isolate the cause of drive train noise in my son's 1991
Prizm (Toyota Corolla). The best I can characterize the noise is a
whine, with a rumble component that turns to a loose clatter on
deceleration. I can hear noise from the driver's side CV as I turn the
wheel by hand. What steps (besides serial parts replacement) can I use
to determine if the noise is being generated by the CV, the wheel
bearing or (minor chords here) the transaxle?

Thanks,

Kevin Gallimore

Im not a vehicle mechanic..far from it..sigh..but it sounds like you
are due for a CV joint.
Id replace the wheel bearing at the same time. Cheap enough.

Gunner

'If you own a gun and have a swimming pool in the yard, the swimming
pool is almost 100 times more likely to kill a child than the gun is.'"
Steven Levitt, UOC prof.

axolotl wrote:
I'm trying to isolate the cause of drive train noise in my son's 1991
Prizm (Toyota Corolla). The best I can characterize the noise is a
whine, with a rumble component that turns to a loose clatter on
deceleration. I can hear noise from the driver's side CV as I turn the
wheel by hand. What steps (besides serial parts replacement) can I use
to determine if the noise is being generated by the CV, the wheel
bearing or (minor chords here) the transaxle?

Thanks,

Kevin Gallimore



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-----== Over 100,000 Newsgroups - 19 Different Servers! =-----
A cv will clackety clack when turning, the rumble is the bearing.
Fixed one once that was too loud to hear the radio.
Or anything else.

wws

A rumble will also come from the output bushing area of the transmission
where the half-shafts exit the tranny. This sometimes sounds like a rump,
rump, rump at certain speeds. My Lincoln only did it at 28 MPH. Also be
aware that a slight swerve under speed will help pinpoint drivetrain noises.
On a front wheel drive, the front wheel bearings may make more noise as they
UNLOAD, opposite from a rear wheel drive 's front wheels, where they make
more rumble when loaded in a swerve. I learned this one the expensive way,
and my tranny specialist friend confirmed this later.

RJ

"wws" wrote in message
...
axolotl wrote:
I'm trying to isolate the cause of drive train noise in my son's 1991
Prizm (Toyota Corolla). The best I can characterize the noise is a
whine, with a rumble component that turns to a loose clatter on
deceleration. I can hear noise from the driver's side CV as I turn the
wheel by hand. What steps (besides serial parts replacement) can I use
to determine if the noise is being generated by the CV, the wheel
bearing or (minor chords here) the transaxle?

Thanks,

Kevin Gallimore



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A cv will clackety clack when turning, the rumble is the bearing.
Fixed one once that was too loud to hear the radio.
Or anything else.

wws

axolotl wrote:

I'm trying to isolate the cause of drive train noise in my son's 1991
Prizm (Toyota Corolla). The best I can characterize the noise is a
whine, with a rumble component that turns to a loose clatter on
deceleration. I can hear noise from the driver's side CV as I turn the
wheel by hand. What steps (besides serial parts replacement) can I use
to determine if the noise is being generated by the CV, the wheel
bearing or (minor chords here) the transaxle?


I have given up diagnosing over the web. One persons rumble is anothers
clatter.

As has been posted, CVs make a clackety sound while under power in a
turn. CV joints don't usually go bad unless the boot rips and the lubes
gone and the joint contaminated.

The whine/ rumble/ clatter would indicate to me the output shaft in the
transaxle is wandering around. I've been wrong on this stuff before.

Does the whine change as per gear?


--

Mark

N.E. Ohio


Never argue with a fool, a bystander can't tell you apart. (S. Clemens,
A.K.A. Mark Twain)

When in doubt hit the throttle. It may not help but it sure ends the
suspense. (Gaz, r.moto)