Over Slope my leveling system ? Newby question

You need to be level to put slides out. Read your instruction manual..

Some mfrs say to put slide out then level but MOST say level first, motor running.

And when your rear wheels are off the ground it can slide.

RVs twist and flex. I’m surprised slides work as well as they do.

Delete

MH rear wheels off the ground makes me nervous.

What DutchmenSport said is the only answer.

EXCESS SLOPE. NOT Overslope. Excess slope just means ONE of your Jacks has reached its FULL extension and cannot extend more to level your RV. So, the Excess Slope light comes ON and shuts the system down. The System has NO WAY to know what the extent of your slope really is. It uses the factor of one jack reaching full extension to signal you are on an excess slope. You can do as you have done and install boards under the side that is lower than the other to get more lift from the side that needs to come up higher. BUT, lifting the tires OFF the ground is a bad practice. Since you have a Tiffin, it would be better to extend the Slides BEFORE extending the jacks. Then RETRACT the jacks before retracting the slides. When you use blocks to get more lift from the Jacks, that puts a bind on the frame/chassis. If the Motorhome is just leaning to one side due to the angle of the ground, then there is no problem operating the slides before extending the jacks. Now, if the ground is very uneven and the corners are twisted, then jacking would be better for the slides. Doug