OD is being intermittent

REBELHIGHBOY

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I just got a 93 w250 and when ever you let off the pedal the it down shifts out if OD any one know what's up?
 

MIDNIGHT RIDER

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KEY=ON, ENGINE=OFF, probe the wires at the Throttle-Position-Sensor with a volt-meter.

The instructions for doing this are in the 1st Gen. "stickies" over at Diesel Truck Resource site.

If your TPS shows bad/dead, many have opted for a dash-mounted potentiometer such that they can dial-in O.D. to suit their requirements.

The ONLY function the TPS controls is over-drive.
 

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