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From: Jeff Strickland on 29 Sep 2009 12:36

"JonB55198" <jonb55198(a)gmail.com> wrote in message
news:cc901057-62b6-44ab-bb86-3fe49243785a(a)f16g2000yqm.googlegroups.com...
> Group,
> Please help me diagnose this noise. Here are the symptoms:
> o Groaning Noise coming front front end
> o noise starts at 10mph
> o frequency increases with wheel speed
> o noise persists while driving straight OR turning
>
> things that have been replaced (eliminated as possibility):
> o both CV joints
>
> background:
> in 1/2009 i got into an accident. we removed the engine and
> transmission to do body work. Engine was stored in a garage while
> work was done. engine/trans was replaced and CV's replaced at the
> same time with new ones. ATF filled to proper level.
>
> The accident was a front end collision with a guard rail at 40mph.
> perhaps this damaged the wheel bearings?
>
> thanks in advance for your help.
> -Jon

With Front Wheel Drive AND a front end accident, the trouble could be
anything. Wheel bearings, and transaxle are good starts.






From: JonB55198 on 29 Sep 2009 14:14

> With Front Wheel Drive AND a front end accident, the trouble could be
> anything. Wheel bearings, and transaxle are good starts.

Jeff,
The trans still shifts smoothly and at the proper times. could a
sudden stop or jolt have damaged a wheel bearing?
-jon
From: Jeff Strickland on 29 Sep 2009 14:16

"JonB55198" <jonb55198(a)gmail.com> wrote in message
news:27ba90f8-bf14-4591-94ff-bbb821597772(a)h13g2000yqk.googlegroups.com...
>
>> With Front Wheel Drive AND a front end accident, the trouble could be
>> anything. Wheel bearings, and transaxle are good starts.
>
> Jeff,
> The trans still shifts smoothly and at the proper times. could a
> sudden stop or jolt have damaged a wheel bearing?
> -jon

Yes, and it could have damaged stuff in the transaxle.




From: JonB55198 on 29 Sep 2009 14:27
> Yes, and it could have damaged stuff in the transaxle.

Jeff, damaged "stuff" in transaxle soudns difficult to diagnose and
repair (ie costly)...right?
From: Ray O on 29 Sep 2009 14:14

"JonB55198" <jonb55198(a)gmail.com> wrote in message
news:cc901057-62b6-44ab-bb86-3fe49243785a(a)f16g2000yqm.googlegroups.com...
> Group,
> Please help me diagnose this noise. Here are the symptoms:
> o Groaning Noise coming front front end
> o noise starts at 10mph
> o frequency increases with wheel speed
> o noise persists while driving straight OR turning
>
> things that have been replaced (eliminated as possibility):
> o both CV joints
>
> background:
> in 1/2009 i got into an accident. we removed the engine and
> transmission to do body work. Engine was stored in a garage while
> work was done. engine/trans was replaced and CV's replaced at the
> same time with new ones. ATF filled to proper level.
>
> The accident was a front end collision with a guard rail at 40mph.
> perhaps this damaged the wheel bearings?
>
> thanks in advance for your help.
> -Jon

I haven't used my standard line in a long time, so here goes...
Noise, vibration, and harshness (NVH) are difficult to diagnose without
hearing and experiencing them first hand.

You didn't mention the type of vehicle and whether it is FWD or 4WD/AWD, the
mileage on the vehicle, condition of the tires, whether you had to do any
frame pulling with the body work, and how the body alignment was checked.

A 40 MPH crash is pretty severe, and there is a good chance that the wheel
bearings and/or hub were damaged, as well as the brake caliper or bracket
that holds the torque plate.

If the frame had to be pulled and chassis alignment wasn't checked either
by measuring the points as specified in the body repair manual or with a
laser alignment machine, the drivetrain could be out of alignment, causing
the CV joints to flex more than they normally would have to.

If the vehicle hasn't gotten a 4 wheel alignment since the repair work, get
one done.

Check the tires for signs of deformation like what would be caused by a
broken belt and for uneven wear that would be caused by an out of alignment
condition.

Check to make sure that the calipers are not seized and move freely on its
sliders, whether the caliper is a fixed type or free floating. Make sure
that the rotor does not contact any part of the caliper body, torque plate,
or backing plate.

If that is OK, then check the wheel bearings by looking for deformation or
grittiness when you rotate the hub.
--

Ray O
(correct punctuation to reply)


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