Check the hydraulic fluid level. It's a little tricky to get to the pump, but you may find your problem there. The pump is located on the right side of the trunk under the paneling. With the paneling and spare tire removed, you should be able to look under the crossbar to see the level. If it's low, you will need to add Pentosin Hydraulic Fluid (the same $$$ stuff used in the power steering pump.) The fluid plug is located on top of the pump and is brass with a hex head. Use a small funnel to add the fluid and be careful not to overtighten the plug when putting back in. Hope this cures your problem!