Date: Sun, 24 Sep 2006 21:58:20 +0100
From: Colin Stamp <>
Subject: Re: Gear Grinding

On 23 Sep 2006 15:31:38 -0700, wrote: >My ethereal bliss over my recently purchased 97 9000 is tainted by one >concern: The gears grind when putting it in reverse, and occasionally >in 3rd. Putting it in first before pulling back to reverse eliminates >that problem, but I'm concerned about the infrequent 3rd gear >grinding eventually producing compromised teeth, and metal floating >around in the gearbox. I don't have any experience of the 9000, but I'd guess it won't have sychromesh on reverse so "they all do that sir". As for third, it's probably the synchromesh getting a bit tired on that gear. It could easily carry on for huge mileages in that state, but you'll need to get used to matching the speed a bit more accurately to avoid the crunching i.e. wait a bit longer for it to spin down in neutral before pushing it into third. Changing oil spec might help, but if you want to really fix it, then it'll probably need a gearbox re-build. >I know the clutch master cylinder was recently >(100 miles ago) replaced without replacing the rubber hoses to and from >the unit. I've read here, and heard elsewhere, that these hoses >sometimes degrade internally and small bits of rubber pushed through >from pressure bleeding can compromise the seals and can also corrupt >the slave cylinder. Does this sound like the kind of thing that could >be affecting the clutch to cause the gear grinding? Clutch is fairly >new and has even pressure all the way down. Any point in changing those >hoses after it's been pressure bled a few times? Also, this car has >had Redline in the transmission for the last 1000 miles. Would changing >to regular oil possibly help the grinding, since it's thicker? I doubt it's the clutch, otherwise reverse would be practically impossible to select with the engine running. Presumably, once you've selected reverse(with or without the crunch) you can happily change between neutral and reverse without crunching? Cheers, Colin.

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