Within the last several weeks my 2007 Vibe (manual transmission) started slipping when upshifting to 3rd gear and also 5th gear. The odometer is approx. 123,000 miles. It seems like between 2,000 rpm and 3,000 rpm the revs dip for 4 or 5 seconds, and then acceleration kicks in again. This happens during normal driving, not just during hard pedal-to-the-floor acceleration.
Is this indicating a clutch rebuild is in my future? Or is this a symptom of a transmission problem?