Like my title I recently swapped a 98 vlsd in my 5th gen because my previous trans was going bad.. after the swap my car wouldnt rev past 2.5 3000 rpm sometimes.. my ses isnt on but I have a pending code saying p0731 A/T 1st gear ratio problem .. it shifts grear in normal driving but when I try to take off or step down it wont rev past 3000 rpm nd it shifts hard.. I need help anybody experienced this? Any guess?

 

Make sure Ground is plugged in on side of tranny to chasis. i know fa sho 4th gen had this and may need to add if 5th don't.