Running 75W-110, no problems here.

 

75w-110 here as well. No issues at all.

 

Redline Heavy Shockproof. So far I like it.

 

I was just going to ask if anyone here ever tried this stuff:

http://www.redlineoil.com/product.aspx?pid=44&pcid=8

How long have you been running it?

I believe the RLO Shockproof oils have suspended, solid molybdenum in them. One of the beauties of using a torsen diff is you don't have to worry about friction compatibility with clutch materials.

 

There isn't any friction compatibility issues, but I will swear that a thicker fluid provides different lock-up properties on my differential, I believe one other forum member agreed with my findings having experienced the same thing on his s2k.

When it comes to long sweeping corners under acceleration I believe the diff was locking up and causing understeer, and if I lifted it would resort to oversteer. It was worst with 75w90, it got better with 75w110, and I think it is perfect with 75w-140 (all Amsoil severe gear fluids). I hope to have a UOA sample of my 75w140 from this season in the next while. If the UOA looks good I'll keep running it into the future.

 

How does the 75W-110 run during cold temperatures? Isnt it more viscous? And wouldnt it be more favorable if the 75-90 were utilized in the cold temps?

 

technically they should be the same in cold temp operation, but there would be a slight difference in the viscosity index between the two as they warm up, if you are talking about a high quality synthetic fluid the difference would be very small as both would meet the same spec. I wouldnt worry about using 75w110 in extreme cold temps (in fact I have). They will both flow better than the 80w90 fluid that Honda dealers use in our diffs, and still provide better warm temp protection IMO, best of both worlds.

 

I switched to Amsoil 75W-140 severe gear oil but I can't hear my diff whine because my ears are bleeding from my exhaust

 

Amsoil 75W-140

 

Royal Purple 75W-140