1991 Ford Ranger 4WD Problems

[bwolf417]

Hello i know very little about this so bear with me please. i have a 91 ford ranger 4.0L V6 auto. i am having problems with the 4wd. when i bought the truck the guy said the front right spindle was bent with caused the 4wd not to work (that is what his mechanic said just by looking at it BUT he did not remove the rotor or anything so i dont know how correct that is). ive noticed when i put the truck in drive it kinda takes some power to get moving but if i put it in reverse back up a couple feet then put it in drive it moves just fine. after doing some research i fould out the the auto hub is stuck in lock. so i dont know if its just the hub or hub and spindle. any thoughts would be greatful. also im not sure if the spindle is d28 or d35. like i said i know very little about this also my AIM is wolfordfour20