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- Path: sparky!uunet!sun-barr!ames!agate!rsoft!mindlink!a50
- From: Cliff_Lum@mindlink.bc.ca (Cliff Lum)
- Newsgroups: rec.autos.tech
- Subject: Re: grinding gears when revving engine at high speed
- Message-ID: <13825@mindlink.bc.ca>
- Date: 29 Jul 92 02:09:24 GMT
- Organization: MIND LINK! - British Columbia, Canada
- Distribution: world
- Lines: 35
-
- > Eric Perozziello writes:
- >
- > Msg-ID: <1992Jul28.181900.25643@leland.Stanford.EDU>
- > Posted: Tue, 28 Jul 92 18:19:00
- > Org. : DSG, Stanford University, CA 94305, USA
- >
- > >
- > >When I rev the engine to nearly redline, shifting to second gear is
- > >very tricky. I try to pull the shifter into second, and instead of
- > >going in, it gives resistance and the transmission makes a very loud
- > >grinding sound. What causes this? More importantly, what is the
- > >proper way to shift quickly in this situation?
- > >--
- >
- > The synchro's in the tranny can't make the 9000 RPM clutch match the
- > NEW say, 5000-6000 RPM input shaft speed, if you were to engage into
- > the next higher gear.
- > You could try double-clutching, or shifting g after holding the cluthc
- > down for a sec, but I guess youre in a hurry if youre shifting at 9 G :^)
- >
- >
- > You could try some RedLine Manual Transmission Lubricant. It is synthetic
- > and specially formaulated for manual transmission. Comes as MTL and MT90.
- > 75W80 and 75W90 respectively.
- > Some benefits are:
- > Eliminates nothchy shifting, enables high speed downshifting which is
- > probably more severe than high speed upshifting, excellent shifting cold, it
- > is better than using regular gear oil but about the same as ATF fluid,
- > non-corrosive to the synchros, perfect synchronizer coefficient of friction.
- > I use MT90 myself, with regular gear oil i coulnd shift down from 3 to 2, and
- > difficult shifting in the mornings when cold, then used ATF fluid (dextron
- > II) which works but some gear noise at higher temps.
- > For an information pak or ordering call (800)624-7958 if it can't be found
- > locally in your area.
- > .
-