I took a Jeep Grand Cherokee to my guy several years back, told him that my daughter was complaining about slow speed shifting and that she was out of town for a week, and to do whatever it needed, up to and including a total rebuild. He called me two hours later, said the Jeep was all done. Said he test drove it, hooked up his pressure gauges to check internals, dropped the pan and changed the fluid & filter - $90 and a clean bill of health. An honest guy.