Hi,

My brother has a knocking from the rear and it could be the rear diff, but b4 changing that I think an oil change will be worth doing.

What oil is needed for the rear diff on a standard W-reg (2000) classic STI? Am I right in thinking its 75W-90?

I've got a few options from Opie Oils, but not sure which is most advisable... semi or fully synthetic?

Or is it worth going for the upgraded stuff?

Thanks
Alex

 

75-90 or go for a thicker 90

Got Fuchs Titan Race Gear 90 LS High Performance Gear And Limited Slip Diff Oil in mine

 

On Opie Oils they have:

Silkolene SILKTRAN SYN 5 75W-90 Fully Synthetic Gear Oil (now Fuchs Titan Race Syn 5 75w-90) ...£12.59 /1 ltr.

Sorry for my ignorance, but is the rear diff limited slip in my bro's car?

 

Alex,

Either the Fuchs Syn 5 or Race Gear 90 LS are fine for open and LSDs.

Cheers

Tim

 

Hi Tim,

Ok I'll go for the Fuchs Titan Race Syn 5 75w-90 ...£12.59 /1 ltr

Thanks
Alex


I'll get myself some aswel as I'm sure mine could do with a change... along with the engine oil!