Hi whats the best oil for a quaife lsd
Cheers ali

From Quaife

If ATB is fitted in a transmission where the oil is shared with the gears - then use the oil type recommended by the manufacturer of the unit.

If fitted in an axle, or if the rest of the 'transmission internals' are of Quaife origin - then use 75W90.

For Dog Engaged gearsets - 75W90 GL4/5
or
For Sychromesh gearsets - 75W90 GL4

They recommend/supply Silkolene as a preferred oil.

I'm using 75w90 fully synthetic in my CTS RS Turbo gearbox with Quaife ATB diff but thats to suit the box, apparently the Quaiffe diff is pretty tolerant of a number of oil specifications.

I use Coma LS80W90 in my jaguar's limited slip diff.

A google search on Limited slip diff Oil should find you all the popular ones, make sure whatever you buy specifies LSD, it does contain additives, and in general is not suitable for regular open diffs.

quaife is ATB so as second post, use gear oil, NOT LSD oil, which is for 'plated' Salisbury type diffs as per 3rd post.

My 7" Quaife sierra diff ran Mobil 1 motorsport equiv of std sierra oil (75w90 from memory, but check...) as a good quality brand

I use Millers CRX 75/90 in my Quaife ATB and it seems fine.