Originally Posted by Wheel366
Originally Posted by wings&wheels
1999 Porsche 996 Used Redline 75w-90 NS per their recommendation and am not that happy. I am a Redline fan, have been for a long time, and their gear oils have made noticeable differences on several cars but their oil made the 996's shifting notchy when warm and downright balky when cold. I'm not sure if I like the notchiness at operating temp and the 'cold' (its a nice weather only car) feel is not great but probably reminds me to be easy on things until up to temp. Having essentially the same transmission in two cars makes for easy comparison.
Not sure if I will switch it out this year, but the Boxster is due and is getting OE Porsche fluid.
On a related note, my 1985 Land Rover has a noisy rear differential. Bearing play is good, smooth and the contact is set up OK, but it is just whiny and a little rumbly. I was running another synthetic 75w-90 but tried Redline heavy shockproof and the difference is like night and day. I was very surprised at the noise reduction. Redline tech said its fine for 5 years or so which is my typical interval (unless I get in serious water, which I do very rarely), so we'll see what it does long term.
I used Redline MT-90 in my 95 pathfinder cause that was what was recommended by redline and a few pathfinder guys. In the winter it was like shifting through thick mud. I had another 5 quarts available after I got rid of the pathfinder and used it in my 2004 A4 6sp. Same issue. I ended up going back to OEM fluid and the difference was night and day. Never did try any other trans fluid in either car. Both are now gone and I have no interest in trying again. I do want to try their engine oil at some point just for gits and shiggles but I have enough oil for all 4 cars for probably the next year or 2.
I have their MT-80 or -90 in most of the transmissions in my signature, most recently the Lotus (basically a Toyota drivetrain) and am happy. Made a big difference in the LR Series transmission compared to dino GL-4, but none of these cars really see below freezing weather.