On a Porsche bulletin board a well respected manufacturer of limited slip differentials says that he has seen transaxles damaged by using Redline lubes in racing situations and recommends that we use Lubrication Engineers 75w90 9921. He says that he has seen damaged trans bearings and diffs from Redline products...Any comments or experience with this phenomenon? I've used Redline 75w90 NS in my cup car and MT-90 in my 944's for years...Now i am worried!
"Redline ruins transaxles".....
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I wouldn't worry too much. Lots of people seem to have success with their lubes. I've had MTL in my Jetta for years without issue.
robert
robert
FWIW I used RL 75w90 NS in my boxster S which had the "automatic braking limited slip differential" and traction control. I put it in to make smoother shifts on the 6 speed. The results were poor. The shifting was only marginally better and the diff made horrible noises when the tires were spinning (the "automatic braking"). I then tried a mix of RL 75w90 NS and something else (maybe MT-90?) I can't remember but it was no better. I finally put the stock fluid back in and it was as smooth as butter and no more banging when the tires were spinning.
I've used redline in manual transmissions before with great results but in that boxster it did not work at all.
I've used redline in manual transmissions before with great results but in that boxster it did not work at all.
I guess I'm screwed
I've never seen any problems using redline oils. I would note tho using a GL5 lube in place of a GL4 will damage stuff so much care should be used when selecting right lube. Especially VW offsprings they're very picky and very unreliable for most part. I wouldnt worry too much redline oil is among the finest quality and baseoils but they're not radically different additives so if the right product went where your in good shape. Just hope u got one the lucky transmission products as to not fail in 120-150K mile range as sooo many have
I've used Redline 75w-90 NS in my 96 BMW final drive as it has no slip modifiers. The factory spec. of Castrol SAF-XO is a syn 75w-90 with no slip modifiers.
BMW now states for all final drive to use Castrol SAF-XJ which is a standard GL5 with additives for limited slip.
Few people in the BMW crowd draw the distinction between the Redline NS and Castrol SAF-XO.
There are few OE's who spec a fluid without slip modifiers, Land Rover being one of them.
In taking to Dave at Redline, he said it was correct in at least relating the two in that again, NS has no slip modifiers.
Dave also added a big BUT in that he would prefer I run the standard Redline 75w-90 and not the NS. Why I asked?
His response was essentially that if the application allowed (and in my case we know it would with all the M1 and RP final drive users out there and BMW stating to use SAF-XJ) the standard Redline 75w-90 was a much more robust product and would hold up better. Dave told me no longer than two years on the NS in the final drive.
What fluid is called for in the cup car?
BMW now states for all final drive to use Castrol SAF-XJ which is a standard GL5 with additives for limited slip.
Few people in the BMW crowd draw the distinction between the Redline NS and Castrol SAF-XO.
There are few OE's who spec a fluid without slip modifiers, Land Rover being one of them.
In taking to Dave at Redline, he said it was correct in at least relating the two in that again, NS has no slip modifiers.
Dave also added a big BUT in that he would prefer I run the standard Redline 75w-90 and not the NS. Why I asked?
His response was essentially that if the application allowed (and in my case we know it would with all the M1 and RP final drive users out there and BMW stating to use SAF-XJ) the standard Redline 75w-90 was a much more robust product and would hold up better. Dave told me no longer than two years on the NS in the final drive.
What fluid is called for in the cup car?
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