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Discussion Starter #1
I drive a Saab 900T from 1991. When driving I frequently experience problems getting into and out of 1st and 2nd gear. If I then lift my foot off the clutch pedal once, and press it down again it works fine. The longer I drive the car the more frequent the problem gets. I would appreciate any ideas for how to fix this.
 

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That's not much information to diagnose a car over the internet. All you can get are guesses.
Clutch master cylinder is my first guess.
 

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How many miles on the car?
Where do you live? Climate makes a difference when you say cold and warm.
Is the clutch fluid level normal?
Is there any leakage visible, either under the Slave Cylinder or the Master Cyliner?
Does it always correct the problem for the moment when you pump the pedal?
How long do you have to drive to see the problem?
Do you sometimes drive and never see the problem? Is it different weather then?
Is there a bit of clutch pedal motion that does nothing (worn linkage)?
Do you know how old the clutch system parts are?

Answer those and I'll ask some more.
 

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Discussion Starter #6
Answers

How many miles on the car?
- 167.000 km

Where do you live? Climate makes a difference when you say cold and warm.
- Living in Scandinavia, but now its spring.

Is the clutch fluid level normal?
- Yes, had it filled up recently

Is there any leakage visible, either under the Slave Cylinder or the Master Cylinder?
- Dont think so but I will check again.

Does it always correct the problem for the moment when you pump the pedal?
- Yes every time.

How long do you have to drive to see the problem?
- To begin with it was about 20-30 min, but now its starts after 10min or so

Do you sometimes drive and never see the problem? Is it different weather then?
- No its always there, and it seems to be doing it in every weather.

Is there a bit of clutch pedal motion that does nothing (worn linkage)?
- No I wouldn't say so.

Do you know how old the clutch system parts are?
- No but my mecanic says the clutch otherwise looks fine.

Many thanks!
 

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Cars cannot be diagnosed on the internet.
Everything you've said points to a failed clutch master cylinder, assuming there is no fluid loss.
Sometimes, when you replace a failed master cylinder, the slave cylinder fails soon after. Try just the master first.
Some suggest just buying the seal kit and rebuilding the cylinder yourself. Suit yourself, but I don't recommend it (I've 'rebuilt' hundreds of hydraulic cylinders).
Good luck.
Where in Scandinavia? I'll be in Oslo and Stockholm in 12-18 days...
 

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Good question...
could have thought it was low due to brake pad wear displacing some of the brake fluid :p

sounds vaguely like clutch master cylinder pressure is bleeding off, and more rapidly the hotter the fluid gets.

first stop here is always clutch master cylinder... a lot of the replacements are rather unreliable... :\
 

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Discussion Starter #11
Thank you. Very helpful. Im from Copenhagen Denmark. Have a great trip to Scandinvia :)

Cars cannot be diagnosed on the internet.
Everything you've said points to a failed clutch master cylinder, assuming there is no fluid loss.
Sometimes, when you replace a failed master cylinder, the slave cylinder fails soon after. Try just the master first.
Some suggest just buying the seal kit and rebuilding the cylinder yourself. Suit yourself, but I don't recommend it (I've 'rebuilt' hundreds of hydraulic cylinders).
Good luck.
Where in Scandinavia? I'll be in Oslo and Stockholm in 12-18 days...
 

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Discussion Starter #13
Thanks! Makes sense since the problem increases after 20-30 min driving. Anything specific to pay attention to when replacing the master cylinder (Im not going to do it myself though)?

could have thought it was low due to brake pad wear displacing some of the brake fluid :p

sounds vaguely like clutch master cylinder pressure is bleeding off, and more rapidly the hotter the fluid gets.

first stop here is always clutch master cylinder... a lot of the replacements are rather unreliable... :\
 

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Easy as pie (American)
Easy-Peasy (UK)
With care and skill, you don't even have to bleed the system.
 

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There was a little bit missing, but not much.
And now you have overfilled it.
Fluid level lowers because your brake pads worns and brake pistons are outer.
When you replace brake pads, you have to push pistons back in and fluid level will be upper (and overflows).
 
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