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Date: Mon, 13 Mar 2006 19:49:40 GMT
From: Paul Halliday <>
Subject: Re: C900 funny transmission sound in 3rd

in article, Dave Hinz at wrote on 13/03/2006 15:39: > On Sun, 12 Mar 2006 23:34:24 GMT, James Sweet <> wrote: >> Recently the '88 C900 (5 speed) gearbox has been making unhealthy >> sounds. I've noticed a slight whine in 5th, and then more recently when >> engine braking in 3rd it makes a somewhat rattly/grindy noise, not >> really nasty but not healthy either. Is this a common problem? > > Yes, the pinion bearings were beefed up a year or three after '88. > >> I'm >> curious if the transmission is doomed to imminent failure, or if this is >> simply a nuisance that may not cause any real problems for years. > > Only if you don't drive it much. Get it fixed (pinion bearings at > least, more if you've driven it much) or find another box. '90 I think > is when it was improved, I'm sure someone can confirm or correct. I heard '89, but it may well depend on the market. Once repaired, the older boxes can be "strengthened" by using a steel inspection cover plate. I think if you're getting grinding noises on over-run/engine braking then it may well be very close to failure and I'd be inclined to have the box looked at with a view to repair. Of course, driving style will affect things so take it easy on the acceleration and perhaps use your brakes rather than the engine until you have it fixed. Thereafter, I can't see why engine braking will put any excessive strain on the box. Paul 1989 900 Turbo S

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