Tow/hd valvebody from revmax. And there is either a thread or I have emails from transengineer on how to do it somewhere ill have to find for you.
Do a couple of searches, one for valve body and one for P0871 and you'll find the instructions from transengineer.I need to replace the valve body in my 08 68rfe transmission. Any recommendations on a good place to buy one other than the dealer, also is there any good instructions or videos on changing it. Doesn't sound to hard but it always nice to have something to fall back too. Thanks in advance!!