Thread: Diff oil amounts

Yeah ? ,now go and try to buy some , Castrol SAF-XO . Cant be bought here , only in rebadged containers from the squealers. Beside why would you , the Redline/Royal purple products are far superior and somewhat cheaper !!!!!!!!

I don't know about 'far' superior, and AFAIK Castrol Oz (used to) stock it, it's primarily a BMW and MAN truck diff oil, but I don't have a BMW or DIII/IV so couldn't be bothered chasing it up.

Remember the usual, remove the top fill plug before you unscrew the drain plug. It is not so much that the fill plug will not unscrew, but that you may not have the correct wrench.

Early 3's required a hexagonal wrench, (8 mm?), later ones required a 3/8" square drive. There were also different torque settings depending upon the wrench size and if it was the drain or fill plug - a Series vehicle still has some advantages.

Also on the rear differential, there is a large protuding hexagonal plug/thing on the front of the rear differential casing. This is to be ignored. You want the little ones at the rear between the exhaust pipes.

Rick130,it appears you dont own or operate a D3/4 ? Its obvious from your comments! Things have moved on greatly from the good old days .

Originally Posted by 400HPONGAS

Rick130,it appears you dont own or operate a D3/4 ? Its obvious from your comments! Things have moved on greatly from the good old days .

Castrol SAF-XO is still available here, I forgot I chased it up for Ean back in November but Castrol had just dropped the 1 litre bottles and it's now only available in 20l drums.

I can't work out why you'd run Shockproof ?

It's overbased with colloidal calcium and is mainly used for circle track and drag racing.
Redline tend not to recommend it for road use, I don't think it would have near the life of a good syn gear oil and may lead to moisture entrapment in a daily driver.

You still cant buy even the 20Ltr drum over here .
First you say its "overkill" Define overkill ? Does that mean its too good for the intended purpopse ? Will overkill , shorten,upset,harm the diff in anyway ?
With your statement of "I dont think it would have near the life of a good syn oil" you allmost imply that the shockproof is not a synthetic. So seeing its "I" then its purely personal opinion! May lead to moisture entrapment , what ? it either does or it doesnt , its not a maybe.As for Redline not recommending for standard road use (whatever that is ) absolute rubbish ! Read the enclosed PDF .
Do I have any Actuarial or Imperical evidence of whether Shockproof is any better or worse than the oil you would choose , No ,only alot of Testimonials and My private use results.
1 lady driver,that has never been off-road in her life has done over 300,000K without incident in her TDV6 , (Because she is scared of Flying,drives Karratha to Perth return every fortnight 3200K round trip)My Indy has been putting it in all rover front diffs from RRC's to D4's for the last 20 years with no complaints.

What ?

Overkill, as in over the top, not needed, there's more than enough protection with standard additised oils for that application.

Why the word games ?

Trying to justify your purchase ?

If you want to run it, fine, that's your choice, did I ever say you shouldn't ?

As for potential moisture entrapment/entrainment, this is what a very good tribologist advised me once, and he likes Redline oils.

Implying it's not a syn fluid ?
Mate, you are really trying for an argument, aren't you.

Redline in the US and here (ie. Tim Slako) generally recommend their stanadrd and NS fluids for road use over Shockproof.
How do I know this ?
They told me !
I'm aware some WA shops use it, Tim told me about six years ago, and his words were that it's overkill too, but they were happy using it.

I'm done with this BS.