I got the stuff form Auto Zone, I didnt even get the GM dealer stuff (which people say is better for whatever reason). In my VW before synchromesh I couldnt shift 2nd to 3rd without it crunching unless i went really really slow with it, once i put synchromesh in, i can pretty much slam it as fast as i can 2nd to 3rd with no issues at all, and its been perfect for the past 100k miles or more. If you can't get that grind to go away you should seriously consider synchromesh though, even if its just as an experiment. The tell tale will be if the D6 fixes the grind or not. I was thinking when the tranny was cold it was less crunchy, however it is also the cause of the synchro grind as once it's warmed or shifted once, the grind goes away. In spite of that Redline recommended the D6, and my Tech also recommending the D6, I can see my self trying the D4 yet, to see if it's the silver bullet. I'd be interested to hear what Redline responds to you with. Ran it for 30k, probably would have been fine for double that, but I don't put many miles on the car, so I change fluids more frequently mileage wise. I have done 2 changes with D4 ATF since I purchased the car and am still happy with it. I'm not sure which to try, however I submitted an email to Redline asking.Īnybody here experience the same issue I have and solved it with either or of the oils? ![]() I'm hoping this Redline D4 can help this.Ĭhecking Redline's site, both the D4 and D6 is recommended for my car. So now that its started to get colder about -4C in the mornings, I'm now getting a grind during my first shift from 1st to 2nd, after that it does not do it and returns to just notchnyess. Searching around the net, I found this this and many other threads that seems to recommend the Redline D4. I was hoping an oil change would fix this. It had a notchy 1 to 2 gear shift, nothing serious, but just not as smooth as 2 to 3rd or any other combo. I just recently purchased a new to me 2010 335ix with 6sp manual, 133,000kms. I was amazed that this was so particular of an issue.įast forward to today. As we later discovered back then, my car had the red dot on the bell housing, thus we drained and loaded the transmission case with Amsoil synthetic ATF, this fixed the grinding problem with synthetic MTF. It worked fine before and I thought I was doing a good thing just swapping over to a synthetic oil. When I bought it in 1996, I swapped out the manual fluid to Amsoil synthetic MTF, and it suffered the 1 to 2nd gear grind. That was a good read, as I use to have a 1992 E36 325i, that had a manual transmission. Sorry to revive an old thread, but thanks for the info and link. I read about and debated between D4 ATF and MTL for a long time when I did mine and I'm happy I went with the ATF. I have used both and the D4 ATF makes the notchiness between gears much smoother. Most manual transmissions take a little over 2 quarts of fluid.I'd reccomend Redline D4 ATF. Recommended for GL-1, GL-3, and GL-4 applications, as well as where most special synchromesh fluids are specified.Satisfies the gear oil viscosity requirements of 75W, 80W and motor oil viscosities of SAE 40, 10W40, and 15W40.Eliminates notchy shifting, even when cold.High performance gear protection and longer synchro life.Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage.Offers quicker shifts, perfect synchronizer coefficient of friction. ![]()
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