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| 8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc |
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03-06-18, 10:01 PM
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Early 408 Differential Parts
My 408 Chassis number is 7023. Information in the resources section lists the differential in the 408 as chassis number 7201 onwards as being a 4 HA Salisbury Hypoid Rear Axle Unit. What differential was used in prior vehicles? I'm looking for bearings, seals, etc. I'm in the U.S. and would appreciate any information regarding this differential.
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07-06-18, 02:14 PM
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I recommend that you talk to Graeme at Bristol Cars Services. Salisbury made axles for a lot of vehicles including Landrovers and the bearings and seals are likely to be identical. But the seals from that era weren't as good as the modern equivalent. I learnt from Martin Barnes at ACCS (which no longer exists) that he had worked with BCS to develop a slightly undersized pinion seal to counteract the fact that the original leather seal slowly ground the pinion shaft slightly undersize. I have to say that the undersized seal worked, and continues to work, a great deal better than the standard Landrover seal that BCS had supplied to me some time prior to that collaborative effort.
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07-06-18, 10:22 PM
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If anyone has reprints of the workshop manual available it will be the Bristol Owners Club (BOC). You may however have to join (and pay £75) to become a member to get access to reprints.
I suppose I could make a copy of mine, it's just a matter of finding the time to do it. Is there any specific information you require?
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08-06-18, 10:59 AM
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Kevin,
I'm primarily interested in the pinion nut and axle nut torque specs. You have been very helpful and I would not ask you to make a copy of your manual. Most everything that I've encountered on my vehicle has been rather straightforward. Thank you, Ron
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08-06-18, 02:10 PM
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Ron,
I am happy to provide whatever information you need from the workshop manual, however it provides very little information about the rear axle - just a few paragraphs. I have workshop manuals for the Aston Martin DB4 and DB5 which go into great details on rebuilding the differential - I suspect they also use the Salisbury 4HA diff, but I can't be sure. Despite providing pages of information about rebuilding it they don't actually say what it is! That said, I once sheared a bolt on a DB6 diff cover because the Aston workshop manual gave an incorrect torque spec! It's 1am here now but I will see what I can find out tomorrow. Kevin
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