I took my 2005 Fleetwood Expedition 38N to shop to have oil change & mech ask did I know that my steps were extended. To make a long story short, he took the drive unit apart, did some thing to it but it still did not work. I asked him to oil /grease it, still did not work so he hit it with a deadblow hammer, it went right in & has worked well since. I did remove all excess grease & oil later to prevent it collecting dirt