Got an 89 trooper 2.6 auto trans with the manual hubs.It's a daily driver but the wife doesnt like to lock the hubs.She wants to shift into 4 like in my truck 90 2.8 5spd with auto hubs.Will a set of auto hubs fit on this or do I need to change axles?Also I've noticed that the front driveshaft will turn if i run the truck with the back tires off the ground(looking for a driveshaft vibration)Will this cause a problem with the hubs locking?