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View Full Version : Need Help!Pre`92 4L80E VSS adjustabilityHow ca



C.K. Piquup
11-30-2003, 05:25
How can I install large tires on a `91 Sub w/4L80E and correct Vehicle Speed Sensor.It won`t want to shift at the right speed/torque points.Also,the Module&ECM will be confused possibly causing problems.With truck totally stock,I have experienced"FAILSAFE".Scanner showed problem to be variation between wheel speed&trans speed.I went out and bought both sensors.That seemed to fix it(with parts still in boxes,on the seat).