I have a 2001 f150 that the low range light tends to be on when I first start it, the truck is not shifting into low range. When I drive it with the low range light on the speedometer is not working properly when I am going 55 the speedometer reads 21. Usually the light will turn off and then the speedometer reads fine. I have tried a new electronic shift motor and a new GEM module with niether fixing the issue , Any suggestions