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Mk IV, Superblower, CRS and other Continuation Cars Forum / Salisbury diff over-heated
« on: July 25, 2013, 16:37:42 »
Having trashed the diff back in March, the car was recovered by Thunder Road who set about removing it and had it rebuilt by their specialist.
FYI – it’s never a good sign when the drain plug is removed and lumps diff fall out.
Many new parts were used in the rebuild and while the diff was out I took the opportunity to have Al and Alec rebuild and refurb the rear suspension. Apart from normal weekend duties the car is used for European trips each year and had often developed a really annoying squeak when being driven for four or five hours at a time. The strip-down revealed a few worn bearings and the lower shock absorber bearing on one side had all but dissapered. Since the rebuild the squeaking has not returned – but I’ve yet to do a long drive.
Anyway, back to the diff, the first time it was fixed and refitted we were off to France within days for the Laon Historique
http://www.continentalcartours.co.uk/documents/f-LHupdateApril.12_001.pdf
By the time we got to Northern France the problem started. The problem was the LSD was locking on slow corners and also when driving out of junctions. This resulted in either the inner rear wheel hopping, spinning or some very unhappy sounds coming from the drive train. On returning to the UK T-R worked incredibly quickly to remove the diff (out in one day!) and sent it back to their diff man.
Turns out the diff was set to “race spec” ie it was too enthusiastic at locking up for road use. The diff was re-set and re filled with what T-R described as the “most expensive oil in the world” and refitted. I think they also used the recommended additive and the problem was instantly solved.
Hope this helps
FYI – it’s never a good sign when the drain plug is removed and lumps diff fall out.
Many new parts were used in the rebuild and while the diff was out I took the opportunity to have Al and Alec rebuild and refurb the rear suspension. Apart from normal weekend duties the car is used for European trips each year and had often developed a really annoying squeak when being driven for four or five hours at a time. The strip-down revealed a few worn bearings and the lower shock absorber bearing on one side had all but dissapered. Since the rebuild the squeaking has not returned – but I’ve yet to do a long drive.
Anyway, back to the diff, the first time it was fixed and refitted we were off to France within days for the Laon Historique
http://www.continentalcartours.co.uk/documents/f-LHupdateApril.12_001.pdf
By the time we got to Northern France the problem started. The problem was the LSD was locking on slow corners and also when driving out of junctions. This resulted in either the inner rear wheel hopping, spinning or some very unhappy sounds coming from the drive train. On returning to the UK T-R worked incredibly quickly to remove the diff (out in one day!) and sent it back to their diff man.
Turns out the diff was set to “race spec” ie it was too enthusiastic at locking up for road use. The diff was re-set and re filled with what T-R described as the “most expensive oil in the world” and refitted. I think they also used the recommended additive and the problem was instantly solved.
Hope this helps
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