Diff oil

[deltamal]

Info required! Iv'e recently fitted a helical gear LSD in my Mk3 Cortina, and I'm not sure what oil should be used as it doesn't need the friction additives that a plate type would, I'm thinking a standard EP 75/90 axle oil?

[DT36]

1 hour ago, deltamal said:

Info required! Iv'e recently fitted a helical gear LSD in my Mk3 Cortina, and I'm not sure what oil should be used as it doesn't need the friction additives that a plate type would, I'm thinking a standard EP 75/90 axle oil?

I have a Quaiffe ATB and I'm positive I used a 75/90. Unsure though if it was GL4 or GL5. 

[Johnny Boy]

I have a helical LSD.

EP 85/90  GL4. I fitted a drain plug, so I could change the oil after 300 miles , to get rid of the running in swarf.

[deltamal]

Thank you! just that I have been running a Capri one for years so wasnt sure.

[Rally Pack 2000]

7 hours ago, Johnny Boy said:

I have a helical LSD.

EP 85/90  GL4. I fitted a drain plug, so I could change the oil after 300 miles , to get rid of the running in swarf.

What was involved in fitting a proper drain plug? Some English axles have them others dont.

[Vista Estate]

A good engineering shop will be able to drill and tap a tapered hole that will fit a standard plug.

[Johnny Boy]

37 minutes ago, Rally Pack 2000 said:

What was involved in fitting a proper drain plug? Some English axles have them others dont.

The better way to do this would be with a clean empty axle, drill a hole, and weld a 1/2 nut on the inside of the case, then a taper plug as  a drain out.

I didn't do that because the axle was all built up in the car.

I drilled a hole, and welded a nut to the outside of the case, and plugged it with a flat bung.

[Johnny Boy]

Here's a picture