[Healeys] drivetrain vibrations

[John Vrugtman]

OK, just what is a compression buckle?

BTW, I have a BJ8 with no normally induced scuttle shake at 55mph; 
normally as in out of round tires, drive shaft unbalanced, unbalanced 
tires, rear brake drums unbalanced.
John


Martin Jansen wrote:
> The most common cause of drive train vibration is the compression buckle- just
> forward of the front bulkhead in the main chassis rail. This compression
> buckle changes the elevation of the transmission in relation to the rear end
> causing the drive shaft to operate outside of its design perimeters this will
> cause a vibration through the centre of the car,same effect as a worn u joint.
> This will eventually effect the pinion bearing and rear transmission bearing.
> Certain suspension modifications can also cause this problem.
> The chassis' purpose is to maintain consistent information to all functioning
> components of the car.
> Happy Healeying,   Marty  www.jule-enterprises.com