I thought this might be of interest
Recently, I flicked an email to Penrite, as their website has engine oils listed for the gearbox and transfer case.
I sent the tech' fella a copy of the Aussie Mahindra CJ340DP lubrication schedule to help determine if the website was right.
Their tech' spec' fella "Alan" [with a name like that he must be a good bloke] replied, telling me not to panic - there was no mistake
cut and pasted his reply........
Thanks for the attachment. [the lube guide]
You’ll notice that for the differentials they call for SAE 90, hypoid type, and underneath put ‘EP’ ie with Extreme Pressure additive –hence our recommendation for a modern gear/diff oil (Gear Oil 80W-90).
For gearbox the reference is different, more basic. Current ISUZU or Holden often take an engine oil in the gearbox, so this is not alarming in the least for a vehicle from 1991. HPR Diesel (20W-60) or HPR 30 will do the job. We also have a dedicated gear oil with comparable viscosity and the same GL-1 rating (GL-1 may be translated as ‘bugger all’). This gear oil is Transoil 90. I’d just use HPR Diesel.
Transfer Case >>> as for gearbox.
Be aware that gear oil numbers and engine oil numbers are on different scales…a bit like Fahrenheit/Centigrade. An SAE 50 engine oil and an SAE 90 gear oil are very close to each other in viscosity.
You could use Gear Oil 140 in the steering, in our climate.
Technical questions and answers
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