What about the speedo? The speedo wouldn't jump up as well if the clutch disc crapped out, would it? IIRC, it didn't when my OEM clutch went out, that's the main reason I didn't think it was the clutch in his case.

2005 Ford F150 SuperCab FX4 1964 Chevrolet Impala SS 1998 CSVT: 354HP/328TQ @ 10 psi, now gone