Could be the pump, the fluid level or the fluid itself. It could also be a loose belt. But I suspect that would squeal when you turn the wheel. I'd say check the fluid level, then try changing the fluid. Those are cheap steps to do. If that isn't the fix and the belt is not slipping, I'd say it's the pump. Keep us posted on your progress...

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1997 Sportage 4x4, auto-trans, Warn manual hubs, 4" UPYOURKIA front lift, TJ 106AA rear springs, 2-5/8" body lift, 31x10.50 treads, SmittyBilt SRC front and XRC rear bumper, swing-out tire mount, OBX LSD front diff, Track Finder rear locker, 5.38 R&Ps and... really crappy gas mileage! <img src="/forums/images/graemlins/shiner.gif" alt="" />