Suzuki: 4 wheel drive, wheel bearings, suzuki xl 7

Question
When I am in 4 wheel drive my 2005 Suzuki XL-7 pulls me all over the road, but it does not do it in 2 wheel drive. Please help me.

Answer
You need to verify that the tires are the same size, with the same amount of wear, and with the pressures set correctly, then make sure the wheel bearings are not loose, something that may not affect steering as much in 2wd.  This is something that an experienced tech needs to drive, and evaluate.  Without specific descriptions in the technical language used by technicians, it's virtually impossible to evaluate the problem.
scotty