Originally Posted By: zeng
Originally Posted By: FordCapriDriver
Just another thing i've noticed that most EP-90 Gear lubes tend to have a KV @ 100 of about 17 to 19, meanwhile Shell Spirax S2A has a KV or 14.7, is this a problem?
The spec'ed pre-2000 SAE EP 90 was split into two categories of :-
a) Current day J306 SAE EP 90 , equivalent to AGMA 4EP gear oil or ISO 150 gear oil ,and
b) Current day J306 SAE EP 110, equivalent to AGMA 5EP gear oil or ISO 220 gear oil.
As said above, SAE 80W90 is thinner than a SAE 90.
Is this a problem?
Yes, if it's use regularly for track/drag race.
No, if your manual transmission is operated as gentle as a traditional torque converter type auto transmission at relatively low engine rpm range.
I'm not putting this is my transmission , i'm putting it in the Differential, and no my car doesn't do any racing or track days or drag racing..., the manual gearbox specs SAE 80 and i'm going for Castrol 80 GL-4 Manual transmission fluid.
But yes i understand what you're saying