Differential info - maybe important

[peteA]

In the process of getting my diff overhauled by alan voigts (he advertises in the TVRCC Sprint magazine) - just needed bearing and seals (for info cost was £300 + VAT + carriage).

anyway - alan is a very helpful bloke and called me to arrange delivery (and ask for payment!) and he started telling me details about the diff and giving me some advice on oil.

apparently the diff is australian and is fitted to a number of cars including TVR's and Aston Martins and he mentioned a few others that I have forgotten now...anyway, the interesting and possibly important bit...

The oil in the diff should have 10% silicone by volume - something to do the limited slip bit? The only product he was aware of that met this requirement was made by 'Morris'....which just happens to be what Racetech sell on their website. Alan did say that there may be others but just that he was not aware of any...?

Just thought this would be a useful 'heads up' for anyone changing their diff oil?

[peteA]

v8sag said:

The only approved lsd oil from BTR (now Danna Spicer) for the IRS lsd's,(not hydratrak) are Castrol SAF-XJ (SAF-XA in Aus and NZ) and Mobil SHS-ID. These contain the friction modifier "Sturaco 7098"
Saying that, I have always used "Penrite limslip 90" and added 6% Sturaco 7098, as have alot of the Holden guys down under.

I know a little bit about oil, etc but starting to get a bit over my head - happy to take advice though.

Cant vouch or back up what I was told only that alan sounded very knowledgeable and its his business...

for info:-

this is the link to Racetech.

http://www.racetechdirect.co.uk/tvr-car-parts-subs...

...and this is the link to the Morris website.

http://www.morrislubricants.co.uk/scripts/prodView...

going to do a bit of checking me thinks...

Take care

[peteA]

Mad Mark said:

Does anyone know the exact QTY of oil the diff takes? Are the QTY's different between the types of diff and how to tell which diff you have fitted?

Cheers.

My normal diff - not hydratrak - takes 1.6 litres according to my tvr owners manual. Ive been warned however that from new the diffs have known to pass oil via the overflow/vent valve on top of the diff. Im going to fill it to the drain plug level...presumably that will be around 1.6 litres?

[peteA]

using morris lodexol xfs 80w/140 api gl5 as recommeded by the guy who rebuilt my diff and as sold by racetech....the bottle states fully synthetic final drive and limited slip differential oil. Its half in now so i hope its ok!