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HIssing sound on start and shifting problems

902 Views 0 Replies 1 Participant Last post by  Fighter453
Hey everyone,

I have a 2002 Saab 9-3 SE 5 speed manual. Of the course of maybe 2 months or so the car would make a weird hissing sound when started. The sound would last for about a minute or so before dying down. The sound would also go away at times when the clutch or the brake has been pressed, but would come back when my foot was off either of them.

Aside from this I noticed that the car would have trouble shifting. This just happened today as it was the first time I went on the highway within the two months that the noise happened (not sure if related). The issue here is that I would shift from third to fourth and the rpm gauge would rise quickly as if I was in neutral. It wouldn't be until I release my foot off of the gas pedal before noticing that the gear would finally engage. My friend said that it might be a slave cylinder issue but I haven't been to a mechanic to confirm.

Any advice would be greatly appreciated as I would like to do my research first before just giving up and going to a mechanic and be charged for repairs that don't make sense.