vibration

[hot-growler]

hello, i wonder if anyone can help me, i have a vibration i can feel in the back of my seat about 2700 revs and goes at about 3200 revs. it was particularly noticable with the hard top on and less so without? thanks steve.

[boxofbits]

With any vibration could be worth checking all running gear, such as prop and drive shaft UJ's, wheel tightness and engine gearbox and diff mounts.

 

If related to engine speed sounds more like engine or gearbox mounts maybe!

 

Regards

 

Kevin

[John Morrison]

What car do you have?

 

Exactly the rev range that Triumph introduced the gearbox damping block for, known as the 'Blob'

 

John.

[Peter Cobbold]

hello, i wonder if anyone can help me, i have a vibration i can feel in the back of my seat about 2700 revs and goes at about 3200 revs. it was particularly noticable with the hard top on and less so without? thanks steve.

An out of balance wheel can do that. Try swapping rear and front on one side and see if the vibration then comes through the steering.

Peter

[hot-growler]

car is 1972 tr6 injection model. will try the wheel swap trick. thanks.

[RogerH]

Exhaust pipes on the chassis.

 

Roger

[John Morrison]

OK so not a four pot,

try getting in the middle of the rev range and knock the car into neutral, if the vibration disappears then its drive train.

 

John.

[Dave Burgess]

You could do what a derbyshire dales member did recently. Change everything! U/J's ,drive shafts, hubs,etc etc all to no avail. Then decided to change his elderly flat spotted tyres, et voila.