I've lost 4th gear in my 93 9000 2.0 Turbo! Goes fine until it reaches 45mph then tries to find 4th, but just coasts and rev counter shoots up. Help, what is it? Something terminal? Dread to think what a new gearbox will cost!!
Does sound serious to me. Similar to experience I had with my '97 9000 when I'd only just bought it. Fine through the gears, then revved up when trying to find top, though it did eventually find it. Box rebuild was the answer (brake bands). Presume you've checked fluid is clean and full?
Yeh, fluid is full and clean.... I don't like the sound of the price of a rebuild!! More than the cars worth... Is it possible to do it yourself? I have never had a gearbox apart before but have messed with engines many times over the years, since my 1st Ford Cortina Mk1 ... aaah those were the days,lol.
Hi Egg. Welcome to Saabscene. Sounds to me that if the fluid is clean, and the other three gears are fine - you don't mention reverse - that one of the hyraulic brake band actuators is broken, stuck, or bust. I have even known a brake band itself to snap at a vital welding point on the part. Has the gearbox ever been rebuilt to your knowledge, or received attention?
I have never stripped ar repaired an auto-box but have read quite a few books about how they work and although I have forgotten a lot,..... there are valves inside which operate the brake bands / clutches. It could be a stuck / dirty valve. The valve chamber can be removed on some auto's for access, or, presumably, be replaced separately..........if you *have* to drive the car before it's fixed; select 3, don't use D and let it go neutral; that'll surely wreck the box if is isn't already.
I've had a similar problem for past 3 years (not getting worse yet!) whereby engine over revs when changing from 3rd to 4th. But only happens when autobox oil is cold, and hardly at all (even when cold) in summer tempretures.
This is directly releated to the valves sticking. So agree with previous post that it could be a valve failure (which may or may not be easier to fix) - check it out before swapping autoboxe's and get an independant opinion from a specialist.
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