I have a Jacobsen Tri King 1900D mower (product id: 67043). I'm encountering the following issue and seeking any help, guidance or suggestions from this forum on what could possibly be the issue. First off , the mower runs great with the reels disengaged, it climbs slopes just fine in both forward and reverse. However, when I engage the reels the mower seems to loose power in the forward direction only, and not in reverse. The steeper the slope the more noticeable the loss in power becomes. On a flat grade you wouldn't notice any loss in power, however when mowing up a slope the mower really struggles to go forward and eventually comes to a slow crawl, I disengage the reel and the mower climbs up the slope just fine and can turn it around and mow down the slope. Climbs up slopes fine in reverse with the reels engaged. Any help on this issue would be greatly appreciated. Thank you!