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 reverse to forward vibration problem

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digimi
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Name : dave johnson
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PostSubject: reverse to forward vibration problem   reverse to forward vibration problem EmptyWed Nov 21, 2012 4:14 pm

My 98 riv at times has a heck of a vibration/noise when going from reverse to forward with a change of direction. The vibration comes compleatly through the steering wheel. Now I notice it will do it on heavey acceleration from a dead stop such as at a stop light. Is it cv joints or what????
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AA
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyWed Nov 21, 2012 6:19 pm

Could be one of the CVs. Is there any clicking when turning? Any noise turning in reverse?

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LARRY70GS
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyWed Nov 21, 2012 6:57 pm

The traction control will make a buzzing noise when activated. Heavy throttle from a dead stop will certainly do it.

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98 Riviera SC3800  All stock except gutted air box.
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albertj
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyWed Nov 21, 2012 11:27 pm

Check Your Motor Mounts (now).
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digimi
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyFri Nov 23, 2012 3:53 pm

Thanks everyone, I dont think its cv problem as there is no clicking on turning.
If i remember the motor mounts r ck by applying the brake and accelaration and watching the motor to see if it "jumps" Is this correct???
About the traction control it seems to have too much vibration for this bit I don't know. Would vibration be enought to shack the steering wheel?? Guess its possible.
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albertj
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyFri Nov 23, 2012 5:20 pm

You check motor mounts by getting under the car and looking at them. If the motor Mount's bolt is not in the middle of the X of each mount, replace. The motor mounts last about 75K miles IIRC.
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digimi
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyThu Nov 29, 2012 6:36 pm

well that helps, now all I need is a youner man cause it's damn hard for me to get up onceI'm down lol
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albertj
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PostSubject: Re: reverse to forward vibration problem   reverse to forward vibration problem EmptyFri Nov 30, 2012 3:57 am

digimi wrote:
well that helps, now all I need is a youner man cause it's damn hard for me to get up onceI'm down lol

You can see the front mount and the passenger side mount by looking down into the engine compartment, but you will need a mirror to see in the side of the mount for checking it for fatigue or failure. You really do have to check the rear mount (mech might cal it a transmission mount) from underneath.

What I suggest - consider having the next oil change done at a dealer where they put the car on a lift -- and have them check the mounts while they are at it. Note,even so, that it is best to check yourself because a lot of otherwise competent mechanics don't know what the Riv mounts are supposed to look like and cant tell that they are or are not wornout.

You can also put the car in neutral and blip the throttle with your finger, if the engine rocks too much in the cradle it's time for new mounts. Too much is more than about 1.5 inches or so.

Albertj
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