Date: Sun, 22 Aug 1999 12:05:37 +0400 From: "Da Bomb" <the.bombnopsamin.net> Subject: Re: Gearbox whine - please interpret what it means.
Four Weis <mweinopsamcom> wrote in message news:37BF7F08.1FAFDDEFnopsamcom... > I guess I am lucky that I do not have a turbo in my Saab, based on your > information. I believe my engine is straining to put out anything past 100 hp, > so the manual tranmission in my 86 should last. At new an 8v 900i should develop 118bhp, according to the cars manual anyway. I think mine gets about 111 now, 88 900i with 50,000 miles. > > Gregory Bower wrote: > > > A 900 gearbox is a very touch beast. Needless to say no oil on the stick is > > not too good a thing. > > > > To start, the classic 900 gearbox was never the strongest component in the > > car. I went to a gearbox rebuilding seminar at Saab about 1 year ago. As > > the head US Saab trainer put it the transmission was originally designed for > > the 99 when it had about 80 HP. During the model's life they added a 5th > > gear by tightening up the spacing and tolerances. In addition, the engine > > guys were always about 10-15 HP ahead of where the transmission guys were. > > So you end up with a fragile gearbox that is not keeping up with the power > > of the engine. Saab fixed the problem in the 89 (I think) model year with a > > new transmission case and larger bearing in the transmission. Which brings > > us to your transmission. > > > > Although they have been known to go much longer, it is not unusual for the > > bearings in a pre-1990 transmission to start to go at your mileage. They > > did in my 87. You have three choices: > > Rebuilt from Saab - very expensive, but will last. > > Replace bearings - OK if the rest of the transmission is OK, but w/o any oil > > in it I would be concerned > > Used Tranny - often the best option if you can find a good one. > > > > I would go to The Saab Network website and look at the archives > > http://www.saabnet.com/tsn . They have entire sections of archives devoted > > to this problem and if you review the postings, you will read about every > > sound ever heard from a 900 transmission. Also, if you post to that list, > > you will get some of the best Saab advice in the country. > > > > Best of luck. > > > > GFB > > > > 97 900 SE 40k > > 90 SPG 140k > > 88 SPG 160k > > 87 900 T 140k > > 84 900 T 180k RIP > > > > Andy Evans <arts.psychologynopsamm.net> wrote in message > > news:H4jv3.6202$Yu4.224053nopsam2-hme0.mcmail.com... > > > I have just bought a 1985 900 Turbo. Quite a bit of work needed doing new > > > turbo, clutch, brakes etc..(but gearbox untouched so far) - alleged 132k > > > miles. Now seems to go OK. The thing that bothers me is the noise of the > > > gearbox, particularly since when I bought it the gearbox had no oil at all > > > apparent on the dipstick. Changes are occasionally notchy - 1st in > > > particular, and reverse noticeable. What I want to know from this group is > > > how to interpret the noise of a gearbox, i.e. the noise that rises and > > falls > > > with revs and stops when the clutch is depressed. This is my first Saab so > > I > > > have no baseline to compare. The sound I hear from the gearbox as one > > > accelerates and decelerates is a kind of 'chord' that goes up and down, > > not > > > one single 'note'. I'm becoming more aware of it in ordinary town driving, > > > since the noise goes up and down as one changes up and down. So, can > > anyone > > > tell me the 'sound character' of gearboxes - what is healthy, what is > > > reasonable, what is on its way out and what is heading for trouble? > > > Incidentally, I used to be a professional jazz musician and I'm very tuned > > > in to sounds in general as you might expect. Feel free to use whatever > > > adjectives you like to describe the 'sounds' cars make. Thanks, Andy > > > > > > -- > > > Andy Evans, email: arts.psychologynopsamm.net > > > Our Website: www.artspsychology.mcmail.com > > > > > > >
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