4x4 Jerking While Traveling Over Icy Rds
I have an '02 4X4 XLT Ranger XCab, 4.0L engine, 3 speed A/T w/ OD and 60,000 miles. While traveling on level ground, between 40 - 53 MPH over packed snow and ice something in the drivetrain is surging or jerking. It happens in both 2WD, more often in 4 High. It happens in Drive or 2nd gear with OD off or on. It does not do it when pulling a grade or going downhill, only on level ground. It seems like the gears in either the differential, transfer case or transmission are getting ahead of themselves and spinning freely then suddenly catch or engage. This makes the truck jerk or surge enough for even a passenger can feel it. This just started happening and has done it consistently for the last 4 times I have driven it in these conditions. Any ideas anyone?