Poor road or wind conditions

Test drive the vehicle on a flat road.

Test drive the vehicle in both directions.

Misaligned front wheels

Inspect the alignment. Refer to Wheel Alignment Specifications in Wheel Alignment.

There is an unbalanced steering gear valve.

If the steering gear valve is unbalanced, the steering effort will be very light in the direction of the lead and heavy in the opposite direction.

Replace the steering gear valve. Refer to Steering Gear Replacement .

The steering shaft is rubbing the I.D. of the shaft tube.

Align the steering column. Refer to Steering Column Replacement in Steering Wheel and Column - Tilt.