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I have used their products in the past, and several of my cars still have their D4 transmission fluid in them. However, based on the used oil analysis I have seen on Bobistheoilguy.com, their oils do not provide stellar results and I think you can actually do better with another oil product. Royal Purple do not do well either.
I use it for everything except engine oil. It seems to do the job. It may be me but my M6 seems a little crunchier. Also, different people have received different recommendations from Redline about which of their products are appropriate for PS, diff, and M6.
I put it in my MN6 and it became nearly impossible to shift (probably due to it being ester based and the seals swelled). Switched to GM synchromesh and the shifting is back to normal.
I've used the Redline DT-4 auto transmission fluid is several MN6s with absolutely stellar results. Much smoother shifting. Also used the differential oil in my 1T and reduced the rear end temp by over 100 degrees.
I was told by a GM tech that the Redline ester based fluid is NOT compatible with the M6 and the Rear diff on my 99C5, but I had already installed some... However, Before I found this out, I developed a leak between the Differential and Trannsmission mount seal and will now have to replace that seal, as even with the new fluid in it, I'm still losing fluid there... The axle seal leaks developed along with it, but was fixed with the new seals and swapping to ASMOIL... I'm using Amsoil in everything I own!
Have Redline D4-ATF in the M6 for over a year with no issues.
Also use their Complete Fuel System Cleaner about once or twice a year and works great.
I use the D4-ATF in the tranny and 5W-30 in the crankcase with no problems. Also throw a bottle of S-1 Complete fuel system cleaner in the tank after every oil change. Original tranny handling 405 RWHP with ease.
Last edited by Laguna Blu; Dec 21, 2004 at 01:49 PM.
Ooh Ooh Mr. Carter Mr. Carter... Their Fuel System kit is the POOP! Cured my fuel gage issues with that stuff, where my Amsoil stuff (And I'm a dealer!) wouldn't fix it at all!
Been running full Redline package in the race car for years...engine, tranny (MTL), and diff (Heavy Shockproof)...never had any issues with seals. For the street cars M1 seems more than adequate.
My recollection of Bob's data put Redline near the top. I'll have to go back and see if that is not true for certain weights, etc.
Well but lets clarify here... WE're talking about race cars where you guys are dumping the fluids between weekends, if not days... I'm talking street car use...
Again, I only know what I reported as a problem to a tech, and what he told me... Who knows... I also use Redline water wetter as well as the si1 Fuel System...
My 99 C5 6speed, has been 100% Redline since new, now at 33,000 miles. No leaks, no smoke, shifts great, runs cool. I run Redline in all four of my Ducatis, one has dry clutch, other three wet.
There was this girl in Bangkok, back in 1965........
I've used their Water Wetter in my 1969 Triumph TR6 and was very satisfied with the results. Old British Sports Cars love to run waaaay hot and after adding WW I noticed themuch lower running temperatures.