Hello!! I hope I'm doing this right! I need some advice please!!! My 2002 Jeep Cherokee Laredo won't shift into cruising gear. Overdrive. Unless vehicle is moving over 45 mph and the key is switched off and right back on and then it shifts like it's supposed to do until speed decreases below 45 and then do it all again!!! Got to be a way to fix that?? I would certainly appreciate any help y'all could provide!!! Driving me nuts!! Thanks!!