Thread: Wrong oil D2 transfercase.

Originally Posted by rick130

The problem is that an 80 or 85W-90 is no thicker at 100*C than a 75W-90, but an 85W-90 is like treacle at start up in winter up here and Syntrax will protect better at high temps (which is something the t/case suffers from) than a lot of mineral based oils.
BTW, above 100*C the Syntax will maintain it's viscosity better than nearly any mineral oil.

If you want to go thicker a 75W-110 would be great, but is as rare as rocking horse manure in Australia, mores the pity, it's a great viscosity.
I think Penrite make one, and any of the US based blenders, (eg Lubrication Engineers, who blend exceptionally good gear oils, mineral and synthetic) probably do too.

Rick, I think the Penrite 75w/110 is still a mineral based oil so wouldn't the full synthetic 75w/90 still be better for heat and longevity in the lt230? Edit; Just checked and it is a 85w/110

Originally Posted by harro

Rick, I think the Penrite 75w/110 is still a mineral based oil so wouldn't the full synthetic 75w/90 still be better for heat and longevity in the lt230? Edit; Just checked and it is a 85w/110

If it's the one I think it is, it's a really, really good oil and can mimic a syn in the temps it can handle.

There are a couple of mineral oils that are better than a lot of syn oils, it all comes down to the blending and additives used, eg Caltex have a range of mineral based oils that use their Group II+ mineral base oils and a borate ester additive package that I've been told by another blender/tribologist are bloody brilliant oils.
Lubrication Engineers are another company that make brilliant, mineral based oils too.

The tcase will deal with everything from DEXIII - 80/90 and engine oil.

Its the application you put it to with the oil thats in it that counts.

The syntrans is a good allrounder.

Thanks Graeme, Rick and Justin for your input, my mind is at rest now knowing that i didnt balls everything up. I will be taking it G Coopers for some attention.