Ok I’ll try and make this brief,
About a month ago I’m driving at 60 down the highway with cruise on when all of a sudden the RPMs start from 2,000 to about 5,000. The Jeep doesn’t go any faster and as soon as I take it off cruise control (tap the brakes, hit the off button) or even holding down the Decel button for a few seconds it acts normal unless I hit the off button then immediately turn cruise back on it jumps right back up, but if it’s off for about 3 seconds it’s fine.
Now being an amateur mechanic my first thought was rebuild the transmission. So I did. And well that was a waste of $3000 because it’s still doing it.
It’s a Grand Cherokee Overland 5.7L V8 Hemi.