why is my tac surging up and down while driving at 35 mph?

Asked by buddadon Jan 12, 2022 at 06:37 PM about the 2005 Jaguar S-TYPE 4.2L V8 RWD

Question type: Maintenance & Repair

tac surges when driving the car at 35mph

1 Answer
26,825

taver91 answered 2 years ago

How steady are you keeping the car at 35 MPH? You might be right at the speed that asks the trans to bump the speed up or don. If it is shifting, the tach will jump with the shift in engine speed.

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