Just a confirmation on this please

hi all

I’ve searched and found alsorts but just wondering wot people’s experiences and views are

I have a 98my d1 and I’m going to change the diff oils and put 80/90 in but...can I use gl-5 or does it have to be gl-4, it’s just that I’ve found things saying that gl-5 corrodes certain parts

Many thanks in advance

Towsey

Gl4.
Easy as pie to find.

Thanks

Except no one in my town has it “oh no mate gl-5 superseded it sorry” is all I seem to get

Is there definetly an issue using gl-5 because I know my mate has it in stock and I’m meant to be using his ramp tomorrow

Cheers

Towsey

GL5 can damage bronze components.

Just use GL4 I'm sure the axles and transfer of can wait.

To be honest I’m not doing t box just diffs, I don’t know if they have bronze in or not. Yeah sounds like gl4 the stuff just typical I get first chance in ages to use ramp and have wrong stuff

GL-4 was not superseded by GL-5 they're different ratings, most of the EP80w-90 around nowadays is GL-5 rather than the old monoweight GL-4 EP90, and is fine in your transfer case and diffs.

What does get complicated is most transaxle oil is marked both GL-4 and GL-5, meaning it is a 5 with friction modifiers and various additives to buffer the sulfur against damaging yellow metals (i.e phosphor bronze) - making it okay in a gearbox / transaxle - whereas purely GL-5 is not.

Short version - manual says it's good.

Brilliant thank you for that, that's the stuff that's already in there now, appreciate it tho

Towsey