Strange vibrations...

[Leg]

Hey, every since I've got the car (99' fl auto legnum) I have been having this strange issue

When cruising along the road at a constant speed (typically around 60 and in fifth, but has happened at other speed) I slowly start to develop and slow vibration
that almost feels like a flat spot in the tyre, but alot more round. the only way I can stop this vibration is to drop is down a gear and/or speed up

It's a little disconcerting as I may have to sell the car in the near future and I don't want to sell someone a problem

Any ideas?

 

[unclepaulie]

had your wheels balanced?

 

[Leg]

going to this week, but the fact that it is quite intermittent and has been getting worse steers me towards something else

 

[TME_Steve]

Engine mounts, drive shafts, wheel balance, hard to say....

 

[PUDG3_VR4]

My auto does this, and it only does at cruising speeds too.
From my observations, it only happens when the torque converter unlocks to reduce rpm.

 

[Leg]

Hmm thought it'd be a bit hard to pinpoint...

That seems to be the same here, i'll get a wheel balance and alignment and flush the tranny and see what happens

 

[trotty]

i would say engine mounts......

 

[naughtika]

gremlins in the bay?

 

[Nitephyre]

Wheel balance, buckled wheel, egged tyres, shagged bushes, engine mounts, shocks etc etc etc... take your pick. I've had/have most of those. Welcome to VR4 ownership

 

[Leg]

Thanks for the input! and yes seems like a few items like to wear out at the same time..

wheel alignment and balance and then check the lcas and driveshafts for play

hopefully it'll work!

 

[PUDG3_VR4]

I have a feeling it'll be the torque converters internal clutch

 

[Leg]

Well the transmission is getting flushed next weekend so I'll report back

 

[Leg]

Okay i pumped the tyres up to 34 psi front and 32psi back (they had dropped to 28 all round because it was sitting for a week or two)

Vibration has completely dissapeared, I'm happy it is but also at a loss ahha

 

[upshotbravo]

Sorry to wake up an old thread but i have discovered a similar issue in my vehicle. Happens at or about 60kph going up hill on moderate throttle. as soon as i dip in to the gas or touch the brakes it stops. Just had the trans flushed and i don't think its a wheel because the issue is only at that particular speed under those particular circumstances. I will check the tire pressure shortly.

 

[PUDG3_VR4]

Check your engine mounts and CV boots to see if they are worn out


Sent from my iPhone using Tapatalk

 

[naughtika]

Sorry to wake up an old thread but i have discovered a similar issue in my vehicle. Happens at or about 60kph going up hill on moderate throttle. as soon as i dip in to the gas or touch the brakes it stops. Just had the trans flushed and i don't think its a wheel because the issue is only at that particular speed under those particular circumstances. I will check the tire pressure shortly.

i'd go with worn/shagged engine roll stopper - mainly the rear one..

I think Steve was having this issue previously..

 

[upshotbravo]

OK, will take a look at those items. If i said i suspect that the vibration is originating in the left rear of the car would that make this easier or harder to pinpoint?