Re: Sudden surges in power - transmission issue? - Saab 9-5 Bulletin Board - Saabnet.com
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Re: Sudden surges in power - transmission issue?
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Posted by bobc [Email] (#473) [Profile/Gallery] (more from bobc) on Tue, 14 Jan 2020 21:21:18 Share Post by Email
In Reply to: Sudden surges in power - transmission issue?, Chip Fichot [Profile/Gallery] , Tue, 14 Jan 2020 10:40:40
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Sometimes an engine hiccup can feel like a transmission hiccup (and vice versa) so its not always obvious where to start. One thing I do when I'm not sure to start with engine or traans is to watch the tach ... when it happens if the RPM drops it's the engine, stumbling in some way. if the RPM rises its the trans doing ... something (downshifting, slipping, etc)

obviously the concern is slipping. the tach should give it away.

also if you suspect its the trans downshifting, try to reproduce:
- in sport mode, shifter in D
- in sport mode, shifter in 3
- in sport mode, shifter in 2
- in sport mode, shifter in 1 (if you can reproduce it at a low speed)
- in non-sport mode, shifter in 3
- in non sport mode, shifter in 2
- in non sport mode, shifter in 1 (if you can reproduce it at a low speed)

Sorry, no answers here, but all of this should get you closer.

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