XSeries-forum

Good morning all. I want to change the oil on both rear diff and the transfer box when I do my engine oil change next. Question is what oil do I need for the diff and transfer box thanks

Just the correct oil.
Easy job to do.

Thanks Alan. But I’m asking what is the correct oil for this job

Not looked at all of this but it might help.
https://www.bimmerworld.com/About-Us/BM ... ntial-Oil/

Transfer box oil -

https://www.realoem.com/bmw/enUS/part?i ... 3222409710
or equivalent

Differential oil -

https://www.realoem.com/bmw/enUS/part?i ... 3222365987
or equivalent

Just get it from the dealers as you don’t need a huge amount and best to get their own to be 100% correct. That’s what I did but was many years ago.

I’d second Raj, when I did some bits to mine I got all the bits from Cotswold BMW and the prices are cheap anyway so you may as well get if from them, even the seals etc were cheap which surprised me

TRANSFER CASE
Oil BMW ATF DIII 83229407858 1 Litre. £14.69
Screw Plug (fill and drain) 27111226467 2 £19.44
Gasket Ring 7119963308 2 £1.13

REAR DIFFERENTIAL
Oil BMW Synthetik OSP 83222365987 2 Litres £57.61
Screw Plug (fill and drain plugs) 33117525064 2 £7.88
Gasket Ring 07119963355 2 £0.86
Dust Guard Ring Outer 33131428097 2 £12.31
Dust Guard Ring Inner 33131214298 2 £15.65
Shaft Seal 33107505604 2 £18.11
Lock Ring 33131214961 2 £1.45

FRONT DIFFERENTIAL
Oil BMW Synthetik OSP 83222365987 2 Litres £59.30
Screw Plug (fill and drain plugs) 33117525064 2 £7.88
Gasket Ring 07119963355 2 £0.86
Reinforcement Plate Bolts 31101096987 6 £72.19
Reinforcement Plate Nuts 33306760587 6 £5.39

Alan Gunn wrote: Thu Nov 12, 2020 7:39 am Just the correct oil.
Easy job to do.

Just the correct oil. Immensely helpful. I rather suspect he knew that ........