My s2 350i has a problem. Fast down changes to second and occasionally fast up changes cause a 'crunch' looks like synchro on second may be on its way out? I am going to change the gearbox oil/atf next week. I have see 'redline' oil mentioned for use instead of atf. Infor welcome...
You are not alone.
Mine does that as well.
I double de-clutch when I want to make sure a gear change will actually slot in cleanly.
Presume you know the trick to avoid a crunch going into reverse, select first briefly and then reverse.
Had a similar problem, a sort of clatter,rattle,crunch, noise when only changing down to second and could feel it vibrating through the gear stick. Investigated further by removing the trim and gear-stick gaiter, driving and looked in as i changed down to 2nd and found that the bottom of the remote housing(gear selector housing) was (when pushed down from the change in to 2nd) rubbing on the prop-shaft as it was spinning making these noises!! This was caused by loose mountings and easily fixed. Sounds like a long shot, but i was prepared for a g-box rebuild until i tried this out of curiosity. Good luck.
Monday 10th February 2003
I'd recommend using semi-synthetic 75W-90 gear oil, as it gives much better protection than ATF.
Matt
Monday 10th February 2003
350matt,
How long have you been using it?
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