V8S -which Diff oil
Discussion
At a guess none of those, V8s should have a limited slip diff?
Don't think you'd be too far adrift with something like this..... Castrol axle Z.
This thread is mainly about oil for the gearbox but there are a couple of posts about diff oil in it.
phillpot said:
At a guess none of those, V8s should have a limited slip diff?
Mine had a BTR Hydratrak viscous diff as standard and I assume this was how they all left the factory. It was appallingly ineffective. This type of diff is very speed sensitive and only works at high speed. Which is a shame since the time you need it most is at low speed. I think it must be aimed at people who want to be able to say they have a limited slip diff but want something that actually drives like an open diff. When I had mine, BTR advised to use the same hypoid diff oil as proper cone diffs. I don't know whether that's still the recommended oil but I suspect it won't matter since the limited slip behaviour is going to be rubbish either way.
GreenV8S said:
Mine had a BTR Hydratrak viscous diff as standard
having read up a bit I think you are absolutely correct, I'd always assumed the V8's had a "proper LSD"That being the case, normal gear oil is all that is required, quoting from Steve Heath's book which in turn quotes from the TVR Owners handbook, recommended oil is ................ wait for it.............. API GL5 LS90
Does the "LS" stand for limited Slip ? were TVR just hedging their bets?
Edited by phillpot on Thursday 14th July 15:41
asteinha said:
Thanks
Your welcome asteinha said:
viscous LSD ---> is it from Ford??
Yes, Granada/Scorpio I think.asteinha said:
I do not found a "drain plug" on the Diff?
filled "for life", you'll have to slacken the back cover bolts if you want to drain it. Or, if it's coming out, tip it up and maybe drain out of fill hole?I haven't seen BTR HydraTrak diff internals first hand, but as I understand it this design uses hydrodynamic pressure to force clutch plates together, so perhaps it would still benefit from using oil designed for conventional friction LSDs. However, the advice from BTR suggested that ordinary hypoid diff oil was all it needed.
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