Fully Synthetic Oil In a type 9 ?

[tarquin]

Good Day Chaps,

The guy at the store said it will be fine in the older boxes ,
Would I be able to use this Castrol BOT 402 SAE 75W-85 GL4 Fully Synthetic manual transmission fluid in my type 9 box safely ?




Cheers any help is much appreciated

[Erikmex]

I use Castrol B373 in my plate diff and type9, best oil in my opinion.

[tarquin]

Its just that I now have a few bottles of this lying around , tried to get some info from an auto supplies shop and they said it should be fine. But to be perfectly honest i dont have much confidence in little snot nosed tadpole behind the counter and his little motor experience that is no dought limited to rice burners

[Erikmex]

Yes the oil you have will be fine.

[Willid1]

Just for information there is an issue using GL-5 spec oil in some older cars gearboxes.

http://www.mobiloil.com/USA-English/..._Gear_Oil.aspx

David

[tarquin]

Lol now I am confused again , it is GL-4 , but fully synthetic , wonder if this will cause problems with the yellow metals ?

[katana]

No - its the additives in GL-5 that make it 'slippery' so causing the syncro's to function worse and corrode 'yellow metals' of which there are plenty in older gearboxes. A GL-4 whether it is straight, semi or fully synth is good to go and won't harm BUT the actual 'feel' of the change slickness may vary with oil type.

[tarquin]

ah cheers , thanks for the info now to test it out