Other Category problem
1993 GMC C2500 V8 Four Wheel Drive Automatic 160000 miles
My suburban runs good up to 2400 rpm in D (overdrive) but then after 2400 the tac intermittently jumps up 50 rpm and you feel a slight lag in speed. (So you kind of go pulsing down the road if over 66mph in Drive.) Doesn't happen at a lower gear and the same rpm.
454 engine with factory replaced trans at 60K.
Thursday, January 24th, 2008 AT 7:23 PM