Diff & transfer box oils

[bazzaboy]

Guys,

Is Penrite Gear Oil - 80W-90 a good choice for the diffs in my 2014 Y61, and Penrite Pro Gear Oil - 75W-90 for the transfer box ?

[Hodge]

Sounds ok.
Just make sure the rear diff oil is limslip variety.

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[Hodge]

I use this.

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[bazzaboy]

Good to know. Just checked, and Penrite 80w-90 Diff oil does have Limslip added. Thanks Hodge.

[Big Gags]

On a somewhat related note - when I change diff oil should I be using some sort of sealant on the sump and fill plugs when I screw them back in? Changed both diff oils a few months ago and didn't use any sort of sealant and I have noticed that they have been weeping a bit of oil. If I should have used a sealant I would also appreciate some advice on what to use?? Thanks, Gags.

[Clunk]

On a somewhat related note - when I change diff oil should I be using some sort of sealant on the sump and fill plugs when I screw them back in? Changed both diff oils a few months ago and didn't use any sort of sealant and I have noticed that they have been weeping a bit of oil. If I should have used a sealant I would also appreciate some advice on what to use?? Thanks, Gags.

I've never used any sealant on sump and diff plugs.... Shouldn't need to

[Hodge]

I've never used any sealant on sump and diff plugs.... Shouldn't need to

This. ^

The plugs are tapered to an extent, so no need for sealing.

[Big Gags]

Thanks. Just went out and managed to get another quarter turn of tension - will see if that stops it from weeping!!

[PeeBee]

There is sometimes a copper washer that deforms to some extent to act as a seal. Apart from that, no sealer in threads

[bazzaboy]

Further to this question .....

After speaking to my son "the mechanic", he says NOT to use any diff oil that has any form of "Limslip" added, as it could effect the workings of the factory fitted diff lock. He says that oils with "Limslip" additives should only be used in LSD's, not open or locker fitted diffs. I contacted Penrite who are making inquiries, as they were apparently unaware of this. They did contact ARB who also say not to use "Limslip" additives with their lockers.

To be continued ......