My transmission is getting tired after 275,000 miles. It grinds going into 3rd and 4th. Also it falls out third when I let off the throttle. In addition it falls out of 1st sometimes when starting from a complete stop. First choice is to get it rebuilt (bearings and syncros). Second choice is to get a used transmission out of a junk. My question is: Will 86-95 transmission bolt straight in to my 88 pathfinder? Also will a trans out of a V6 hard body work? Also, is a later model transmission more desirable because they hold more fluid?