The gear is metal, about 4 inches long, and has a spline looking gear on the end that goes into the transmission and a small dime size sprocket looking gear that fits into a electronic part. I have tried a few transmisson places, they say dealer item. the dealers say it was discontinued in 1993.
91 dodge pickup on 1994 Dodge Ram 2500
by grandma in West Fork, AR on March 31, 2009
ANSWER by hemicuda on March 31, 2009
go to this site http://www.transmissioncenter.net/speedometer_calibration_______va.htm and see if this is the gear your looking for.