The 2010 SR5 4Runner does not have an electronic transfer case like the 4Runner Limited. It has a manual transfer case with a stick lever coming out of the transfer case like those that we saw years ago. You can move the lever to 2WD, 4LWD, 4HWD and a Neutral Position. So with the transfer case in the neutral position, the rotation of the drive shaft from the rear differential, when towing behind a motorhome, is not transmitted to the transmission thus no abnormal wear and tear can take place. Furthermore, unless I am mistaken, the lubrication of the manual transfer case is accomplished by splashing and not by a pump like the transmission.
Any comments!