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Re: Manual transmission gear oils (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Rod... on May 29, 2000 at 00:47:37:

In Reply to: Manual transmission gear oils posted by Ted on May 28, 2000 at 17:19:02:

: Hello, fellow bmw freaks
: I need your opinions on the best gear oil for my 87 M6 transmission. I am rebuilding this week, just got all the parts. The 3rd to 4th gear fork was worn out. Which is better, synthetic or mineral gear oils, and what name brands.

: thanks
: Ted

I suggest you stick with the BMW Fluid Specification of petroleum ATF Dextron.
I tried to use Redline synthetic MTL with the recommendation of Redline. After a short period of use gear clashes started during down-shifts into third and second. Occasionally during up-shifts. I then switched to their synthetic ATF. Then, the transmission became difficult to engage first gear from clutch depression and the gear clashes continued. This is the symptom of a transmission fluid that was to slippery for the synchros.
I re-installed petroleum ATF Dextron III and the ease of engagement returned to normal and gear clashes stopped within 2-3K miles.
Win some loose some.
Rod…


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