I got the following from Richard Bremen. He asked Newmar the same question.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Locate the driveshaft under the slide room in the baggage compartments.
Follow the shaft from the cogs that drive the room to a cup, trans torque
bushing. Those are the side to side adjustment points. With the room
approximately half way out take a measurement on each side of the room from
the same point on the sidewall to the same point on the slide room exterior
wall. Loosen one bushing 3 turns using a 1 1/2 inch wrench and tap on the
cup part with a hammer to loosen the wedge inside. Using a pipe wrench move
the side of the room (as needed) to make both sides even. Tighten the nut to
100 ft lb (tight) while holding the shaft with the pipe wrench.
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AKA - Oemy