hi all, at 70mph i have a bad vibration on my 2wd saff, feel it through the seats, definately coming from the back, maybe n/s?

ive checked everything i can find, brakes arent binding, dampers are fine, prop and diff both been checked,

its not as harsh at 90 mph and doing 30 - 40 round town there is nothing noticeable

any one know or can help? thanks

 

Has a balance weight come off the prop ?, check the rear beam bushes.
tabetha

 

mine was doing this as well crossy i looked at my prop while it was on the car only when i took it off could i see the centre support bearing is shagged no play or anything just the rubber part looks distorted

 

tabetha, i had the prop reconned 6000 mile ago, mate of mine said if the prop was in balanced then it would vibrate at any speed?

rear arms bushes or main bushes? the main ones are powerflex, i cant seem to find any play in the rear trailling arms,

botters, was your vibrating?

 

twas shaking like a shitting dog mate at approx 50-60 mph would not do it above nor below
an imbalanced prop would not neccesarily shake all the time the same as some imbalanced wheels will only shake at certain speeds

 

Your mate is wrong, my dads car has a custom prop(V8 4i) that only shakes above above 110, had it rebalanced, weight had come off, doesn't shake at all now, there was absolutely no shake below 110, remember any out of balance will be there all the time, but rubber bushes etc absorb a lot until the out of balance forces have overcome the damping properties, just like out of balance wheels.
tabetha

 

Get the wheel re balanced mate.

 

i have a spare prop, will swap and see if it goes, thanks tabetha

paul, i am doing that too, but never had a rear wheel out of balance make my dash rattle

 

The joint on one of the shafts hasnt come loose has it? Had that happen before

 

the CV joints? i have a pair of brand new reconned ones sat there, so i thought about trying them, but there so clean and shiney

 

Yeah the inner o/s one of mine had started to come loose and it was vibrating like a bastard. Made it feel like it had really bad flat spots on the rear tyres. I got about 5 turns on each bolt.

 

Hey Buddy try swapping the front wheels to the rear it may be a tyre that has de-formed.. if you need some give me a shout ill hook you up seeing as i got a tyre shop. if that doesant sort it my old saph started doing that the diff had died.

 

I have a problem similar to this .... my 2wd vibrates bad as well and it is most noticable at a certain RPM.
I can feel it in neutral as well, but only if I rev it to where the vibration occurs.

If it's a DIFF or Gearbox problem, would it still be doing it when rev'ing in neutral ? ...
I'm suspecting a gearbox mount, but haven't had time to check it yet ...

Cheers
Thomas

 

A vibration at a certain rpm is almost defo going to be the engine and/or gearbox mount, mine did this at 50mph in 5th gear no other gear so was convinced it was the box, done a few miles, replaced the engine and box mounts 100% gone.
tabetha

 

I would just blame Damo mate hope you sort it fella

 

+1 ive seen how he drives other peoples cars and if you saw him driving your saff how i have you would never let him drive it again lol!

 

My work mate had this on his van and it turned out to be the beads in his tyre had broke . try swoping your wheels round to see if it is just this

 

Hi I have a Sierra Sapphire Cosworth Rally Car vibrating at 4th and 5th Gear over 100 mph I'll try getting the prop rebalanced thanks