Jim,
The transmission shift points move up in low range, it also downshifts earlier. It is difficult to verbalize but very noticeable.
You can check it out like this:
Shift into low range and transmission in drive. Accererate moderately. The trans will go 1,2,3,od quite rapidly.
Stop and crawl underneath, plug the low 4 position switch back in and repeat the test. You will find that the gears hold for much longer, and when you let off the trans downshifts.
Give it a try...................
Regards....Dan
