1993 P30 Chev 6.2 diesel. 109000 miles. Just started late shift in all gears.
Off about 10-14 mph. 2-3 28mph, 2-3 40-42- OD 62+mph. Unhooked speed sensor on
back of manifold, top of oil pump drive. Tran light came on but no differace in
shifting. Any Ideas? Dealer wants $135.oo for sensor.