240 "81 driveshaft/axle question

Betcha....U-Joints!

Martijn wrote:

Steve,

"U-Joints" where are they situated under the car.

Cheers,

Martijn

Martijn

The Universal couplings, allow the drive (prop) shaft to change angle, and flex in two places, one is just behind the gearbox, the other is just behind a support bearing further back the shaft. Check to see they rotate freely, solidly, there should be no 'clunk' when you rotate the propshaft to and fro.

Ken

The Universal couplings, allow the drive (prop) shaft to change angle, and flex in two places, one is just behind the gearbox, the other is just behind a support bearing further back the shaft. Check to see they rotate freely, solidly, there should be no 'clunk' when you rotate the propshaft to and fro.

Ken

Ken,

The garage I consulted said that these two are OK. The prop shaft runs freely an I I trun it manuallyb there is no clunk. This garage also has a lot of Amazon's in service so they should know what they are talking about. Any more tips. I changed all 4 shockbreakers myself 3 months ago, so they are fine as well.

Cheers,

Martijn

With the problem happening in first, and first gear acceleration usually being a fairly high torque situation, the only other thing I can think of is a suspect engine or gearbox mount, or possibly the exhaust vibrating against the underside of the car, where the pipe passes over the axle (this is quite likely especially if the system is warm, as the pipe lengthens, and rises upwards as slack in the backbox rubbers is taken up. There is a specific alignment that the back box should be set to for this not to happen, but it be difficult to remedy. I once got very bad vibration problem, which took ages to trace, caused by a badly installed (off centre, someone had butchered and bodged it, thinking it wouldn't go on properly, they were wrong) clutch pressure plate, which I inherited with the purchase of the car, but I would have thought this is very rare.

Ken