When I level with the toad still attached, I make sure that the toad transmission is still in neutral as it will need to move a little as the motorhome goes up to level and again when the jacks are retracted.
Fred & Vicki
Richmond Hill, Ga
2000 Holiday Rambler Endeavor/Freightliner/330 Cat
2000 Honda Odyssey toad w SMI Silent Partner braking system
Sure you can. What you have to take into consideration is the amount you'll need to raise the rear of the coach, if needed, to get it level. And the only reason you need to think about it is because if, you decide to disconnect while your level and you're at some strange angle, you might have a bind on the tow bar. But, tow bars are made to pivot, up and down. So, you should have no issues leaving it connected and leveling.
Scott and Karla SDFD RETIRED
2004 Itasca Horizon, 36GD Slate Blue 330 CAT
2011 GMC Sierra 1500 Ext Cab 4x4 Toad 2008 Caliente Red LVL II GL 1800 Goldwing KI60ND
I'll be the 'contrarian' (sp?)here. As a 'personal,' and I'll assume a general norm, your tow bar should be going straight at the MH hitch ball. If you put down the jacks and give that an 'upward slope' the disconnect can turn into a total pain where one sits. In down the road mode (assuming a flat parking pad here) everything is in alignment. You have to disconnect sooner or later ... sooner is better.
That way you can adjust the MH anyway you want and 'toad' couldn't care less.