I had this happen occasionally on my Plus 4 before I fitted the 5 link rear suspension, particularly on hard right hairpins. This continued to occur even after I had a panhard rod and the more rigid 5 leaf rear springs fitted.

There may a couple of reasons why this occurs on your car.

1. At about the time your car was built Morgan were being supplied with rather poor quality springs. Our 2012 car had only 9cm (or less) of unloaded ground clearance under the centre crossmember when we got it home from the factory.

2. Under hard acceleration the front of the diff twists upwards. Anti tramp bars are not normally fitted to a 4/4.

To resolve points 1 and 2 a new set of 4 leaf asymmetrical leaf springs would help. I'm not sure if these are still available from SSL.

3. Under hard cornering the axle will move to one side slightly. A panhard rod will resolve that problem.

The combination of hard cornering and acceleration will combine the above two effects as the rear suspension is compressed and flexs due to the two forces being applied.

My solution has been to fit the 5 link rear suspension. Not cheap but it has transformed the car from a jolting cart to a comfortable sporty tourer. The 5 link suspension completely controls the movement of the rear axle.

By the way; the rear transmission tunnel is a panel of sheet aluminium, not cast.

Peter

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