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Saab Classic 900 Workshop Classic Saab 900 (1979-1993 & '94 Convertible) Technical Forum.

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  #1  
Old 13-02-05
The_Boy_Racer The_Boy_Racer is offline
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Default It's time to get some fluids down here.

Hullo.

New Saab owner (2 months!) and new to the board. I've got a few questions.

My power sterring fluid is rather low and it needs to be changed, is there a good oil for this? and is this a hard thing to do? I just want to to top it. Or would it be better to flush it?

Second, my transmission has been "sticking" a bit lately. I read in past threads that people were using Dexron III, but it appears that it only works in automatic transmissions, mine is manual. Again any advice on transmission oil would be much appreciated.

Thanks, lads!

PePe.
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  #2  
Old 13-02-05
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NewBoySaab NewBoySaab is offline
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Quote:
Originally Posted by The_Boy_Racer
Hullo.

New Saab owner (2 months!) and new to the board. I've got a few questions.

My power sterring fluid is rather low and it needs to be changed, is there a good oil for this? and is this a hard thing to do? I just want to to top it. Or would it be better to flush it?

Second, my transmission has been "sticking" a bit lately. I read in past threads that people were using Dexron III, but it appears that it only works in automatic transmissions, mine is manual. Again any advice on transmission oil would be much appreciated.

Thanks, lads!

PePe.
Topping up is easy, open the reservoir on (passenger side, for you US folks) and top it up until the level it up to the full mark. Remembering of course to clean all around the cap before taking it off, because you don't want to get anyting else in there like grit or dirt.

I might be wrong about this, so disregard it if someone else says so, but I think you should top up with the same oil that's in there. If you don't know, you should drain the system first.

As for your gearbox problem... your guess is as good as mine.
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  #3  
Old 13-02-05
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Earth Brown Earth Brown is offline
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gear box oil on a c900 is regular 10w30 or 10w40.

DO NOT USE SYNTHETIC OIL IN THE TRANSMISSION!!! as synthetic oil provides tooo much lubrication for the syncros to work properly. Takes about 2.5-3 US quarts.

FOr some of the later c900, there is no drain plug, so you either put the car on ramps or jack the ft up and remove the rear cover of the transmission. On the reatr cover when you remove it, you will see a little screen trap, clean this out and re install, then either have a new gasket ready or leave the old one on and use silicone to help seal, I personally am a big fan of silicone.

YOu will want to change the transmission oil 2 times in a short peroid to help flush out some of the contaminents that may be present.



AS for the PS fluid, just add fluid, as you will probably soon find out, there is most likely a leak. So every year or so you will have replaced the fluid


YOu did not ask but i will offer my $.02 anyway, Run a Full Synthetic oil in the engine, start with either, a 5w50, 5w40, 0w40 or 10w40, If after 3000-5000 miles you are not having to add a crap load of oil then run a ?w30 FOr a turbo car running it hard(or city) a ?w50 or ?w40 is best as they run hotter. First time you use synthetic change it at 1k miles to flush,( or use a engine flush like GumOut) Then after the flush you can run 5-8k miles(or every 4months) on the oil, making sure to check oil atleast every other fill up.




Best Wishes,
Earth Brown
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  #4  
Old 24-03-05
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Mine was a '79 900 4 speed - I used a synthetic 75-90 gear oil for at least 40,000 miles without a problem. The synchronizers were worn at 120K and still worn at 160K.

I would never use engine oil in a transmission or ATF in a manual trans.
The '69 99 called out for a 75 weight oil - very hard to find..
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  #5  
Old 24-03-05
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MSOEMiller MSOEMiller is offline
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This subject has been done to death.

Please search the forums under the Classic 900. You will know way too much after you are done.

Click on the link below . . .

http://www.saabcentral.com/forums/search.php?
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