Bad bad bad vibrations

[jimburr]

Give the wedge a good run out the weekend. Had the chance to give it the real beans 69 and a bit MPH you know what I'm sayin! Cruse at 60 fine, accelarate high through the revs a bit grumbly. But high speed gosh it rumbles like crazy. What am I looking for here guy's? engine/gearbox/diff mountings are my thoughts.

[mrzigazaga]

Hi mate...Could be wheel bearings..The fronts should have a little bit of play...Jack up and check the front and rear for any excesses play up and down..In and out on the N/S rear can be the hub nut.....Uj's can grumble a bit as well but i would check the wheel bearings and Hub nuts first...Ziga

[gmw9666]

When I first got the 420, when you gave it the beans at the speed you say I also had vibrations

My issues was engine mounts, they had splits and sagged slightly so when the engine was rocking and rolling the exhaust manifold touched the chassis causing the vibration

New mounts fitted by tvr power and zero vibrations :-)

[Wedg1e]

On my car I always put it down to cumulative wear on rear wheel bearings and UJs... easiest to see if you slip into neutral and coast down from high speed, so the engine vibes and exhaust rumble are out of the equation.

The diff mountings are probably the least of your worries.

[wooly350i]

Wheel balancing is another obvious one, drive shaft uj's,propshaft uj's.

[jimburr]

Ah low gear in traffic in gear on and off the power It's a bit jerky!

[Wedg1e]

jimburr said:

Ah low gear in traffic in gear on and off the power It's a bit jerky!

Again, UJs, engine and gearbox mounts (my g/box mounts were like chewing gum when I took the engine out in 2001, they'd dissolved in leaking transmission oil).

[adam quantrill]

Don't forget the propshaft bolts which can work loose, and the nuts holding the driveshafts onto the rear discs, and the wheel nuts! Probably check these in the reverse order!!

[wooly350i]

Wheel balancing is another obvious one, drive shaft uj's,propshaft uj's.