Get the front end off the ground and holding at the sides, then on the verticals, see if you have play.
Check the ball joints by prying between the A arm and the knuckle.
Make sure all your lug nuts are tight.
Double check the axle nut.
O.
next time you catch it happening, open the reservoir and shine a light in, have someone steer the wheel with engine on. if you see bubbles it's a hose leak.
Shwan is in your area, but I don't know that he is taking on any work.
Super Rupair
www.superrupair.com
1309 Yarmouth Ave, Boulder, CO 80304
(303) 442-6508
Very good.