on two lane road, 55mph speed limit, the cruise control feels fine in 5th gear. im cruising 55-60 mph @ 28-3000 rpm if I use 6th it drops 21-2300rpm and feel jerky. above 65mph cruise feels great and runs about that that same 28-3000 rpm up to about 80mph on the interstate. seems odd but it feels like ill only be using 6th on the interstate, is this normal gearing. this was my second trip over 600 miles and first on some interstate