WHAT CAUSES THE RPM TO JUMP (ABOUT 200) WHILE DRIVING ?
WHILE DRIVING THE RPM INCREASES ABOUT 200 AND DROPS BACK. THIS
HAPPENS AFTER I HAVE DRIVEN A FEW MILES AND THE TRUCK HAS
WARMED UP. IT SEEMS TO BE SHIFTING NORMALLY. BUT WHEN I AM
GOING AT A STEADY SPEED THE RPM STARTS JUMPING.