Hi Gary,
Welcome to the world of swing-spring suspension! Late model Spifires and GT6s often suffer from sitting lopsided, it's the problem is nowhere near as
common on the earlier cars with a swin axle arrangement. While this would immediatelysuggest the problem lies with the reqr end, that's not necessarily
the case. Having much lower resistance to roll than the earlier cars, the rear end can allow a lean which would be disguised by the stiffer arrangement
on the earlier cars.
To establish which end the fault lies, jack up each end of the car by a central point and see when the lean goes away. When you jack the car up
centrally beneath the diff so only the front wheels are on the ground, if the lean goes away then you know that the front end is sitting level. Jack up
the front at the centre of the crossmember beneath the engine, if the lean goes away then the rear end is fine. If the lean goes away in both instances
you're on your own...
Known causes of a lean as follows:
Front or rear springs (both eliminated).
Worn rubber pad within the rear spring pivot box, should be changed together with the spring.
Twisted front anti-roll bar.
Different length driveshafts - only one inch difference between early and late so not easily detected.
Seized rear trunnion bush holding suspension in wrong attitude.
Front suspension shims uneequal.
Front suspension turret shims unequal.
Packer fitted to front suspension spring on one side only - used by the factory on LHD cars to provide offset for weight of driver and fuel tank on the
same side of the vehicle.
Other than that there is the possibility of a twist in the chassis, but I would doubt it. If anything else comes to mind I'll let you know,
Cheers,
Bill.
