This happened last week when I picked up my first jeep, 2010 wrangler sahara. During delivery my salesman is doing his check list thing. He insists on demonstrating 4wdr operation even though I tell him Ill read the manual at home. No prob. he says ,Take a second to do. 2h to 4h no prob. , a little sticky, but hey its new. Now he wants to show me 4L. While we a parked he very firmly trys 1st time, no go. 2nd time he remembers to put shifter into "n", still no go. Third times a charm, it slips in with a clank. at this point I'm feeling sick and ask, "Is it standard proceedure to destroy a customers transmission prior to delivery"? I take it home, every thing seems ok. I called around and did some research on the subject. Seems we should have been rolling 2-3 mph, the preferred method. Now that I'm tramatized about using 4wL, should I be concerned about what he did. I did call a couple of other dealers who said the wranglers are pretty tough and I should be fine.