What Gearbox Oil For 915 LSD?

[NeilH]

Hi all

Looking at doing an oil change as not done one while I've owned the car. No particular issues with the box, just the usual characteristics for a 915 - sometimes 1st gear a bit difficult to select for stationary.

Seen lots about Swepco 201- in favour and for improving the shift, but then a couple of real concerns in using it?!

Mine is an LSD and just road use only.

Any recommendations?

Best regards
Neil

 

[richardstephens777]

Hi Neil,
I have always used Miller oils for my 915 LSD gearbox.
I currently use Miller CRX LX 80W90 LSD oil.
It looks as though they have a new oil LSD product - limited slip 90

https://www.millersoils.co.uk/products/limited-slip-90-2/

Cheers,
Rich

 

[NeilH]

Thanks Rich.

Millers was possibly the next best recommended after Swepco - just too concerned about the small, but very detrimental, comments about it though.

Will go with Millers.

Many thanks
Neil

 

[Old and Slow]

Also, I think it helps if you engage 2nd gear momentarily before engaging 1st, as this gets the synchro moving. Might be wrong, though, as the Porsche gearbox is a unique design IIRC.

 

[NeilH]

Also, I think it helps if you engage 2nd gear momentarily before engaging 1st, as this gets the synchro moving. Might be wrong, though, as the Porsche gearbox is a unique design IIRC.

Yes, will occasionally do this if 1st is an issue - always do rev matching when changing gear on the move. All part of the involvement of driving these old cars.