Why do the Rpms jumping at 45 mph

Asked by TINA Apr 06, 2021 at 06:40 PM about the 2005 Jeep Liberty Sport

Question type: Maintenance & Repair

Why is the RPMs jumping up to 4 when I go 45 mph also
sounds like my muffler is going while this is happening I let
up off the gas pedal and it stops

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