Thread: Hypoid 80w90 for D1?

Well it is all done. Apart from the Cav filter which I am having probs with getting to stop leaking. The oils are done and should show 20,000 kms of service hopefuly except for the engine of course.

They didn't really need changing but I wanted to do it all myself to make sure I could and to freshen it up before my 2,000 km trip in a week. I was worried about things losing oil but everything seemed to be as full as it should be so no dramas.

Thanks again to everyone.

Xav

Gearbox oil can go everywhere except the gearbox. In the gearbox use SynTrans. $20 per litre bottle at the Castrol distributor.

Don't put syntrans in the transfercase or diffs - if for other reason that it is expensive and cheaper gear oil will be better anyway for that application.

Garry

Originally Posted by nice1guv

My 2 cents: I use Hypoid gear oil 80w-90 in my diffs and transfer box.

Hypoid gear oil 80w-90 is recommened in the Haynes manual, and I have had not problems with it so far.

Most diff oils have sulphur in it. That is why it has a distinctive smell. Sulphur and yellow metals do not play well together. It actually eats it away. Gearboxes and some transfer cases have yellow metal parts. I recently pulled down my swivels. The diff oil had eaten into and destroy the brass bushes at the end of the axle and where the CV fits into the stub axles. This was even with using diff oil that claim to be freindly with yellow metals. So if it smells like diff oil, don't use it where there yellow metal parts.

Originally Posted by r.over

Most diff oils have sulphur in it. That is why it has a distinctive smell. Sulphur and yellow metals do not play well together. It actually eats it away. Gearboxes and some transfer cases have yellow metal parts. I recently pulled down my swivels. The diff oil had eaten into and destroy the brass bushes at the end of the axle and where the CV fits into the stub axles. This was even with using diff oil that claim to be freindly with yellow metals. So if it smells like diff oil, don't use it where there yellow metal parts.

You suggest gearbox oil, so what exactly should I be using in the diffs and transfer case?

The red ATF gearbox oil seems too thin to use in the diffs?

What name and type of oil are you using?

The last thing I want is oil eatin the gears!

Originally Posted by nice1guv

You suggest gearbox oil, so what exactly should I be using in the diffs and transfer case?

The red ATF gearbox oil seems too thin to use in the diffs?

What name and type of oil are you using?

The last thing I want is oil eatin the gears!

Use gearbox oil in the manual gearbox and transfer case. Apparently if the transfer case is chain driven you use ATF. Use diff oil in the diffs. By rights you should not use diff oil in the swivels due to the yellow metal in there, but the reality is that you will not keep the diff and swivel oils separated. So just try and find a diff oil that the indicate is friendly to yellow metals. Penrite claim this, but I am positive I have only used their oils in the swivels and the yellow metal had been eaten away the last time I pull them down. So I cannot offer a solution for the swivels.

Diff oil will not each your gears. It can eat yellow metals that are used for spacers, bushes, synchros, etc. I am not even sure whether the later transfer boxes had any yellow metal in them. But you do not need to use diff oil in the transfer case so why take the risk.

I only use Penrite oils. HPR15 in the engine, 85/140 in the diffs, gear oil 80 in the transfer case, ATF D3 in the auto.