Originally Posted by kversch
I have another question, I read that tunes and chips can cause your trans to fail early? My trans as far as I know is the original trans and has never been rebuilt, it has 255000 on it. should I be worried about my trans.
To be honest you should be worried at 255,000 on the original trans that someone won't try and steal it from you. Thats a lot of miles on an original E40D trans to have no needed maintience. If anything I would do an aftermarket Valve body. It will go nicely with Jody's tuning. The accumulator springs are prone to wear out and the Aftermarket valve bodies replace the springs with better quality ones. If you plan on keeping this rig for a long time and your going to just drive and tow moderate weights or nothing too heavy with it, replacing the tranny with a mild tow tranny might not be an bad Idea.
As for the tunes you cannot predict anything won't happen, but I assure Jody has done the research to make sure his tunes with safe transmission tuning if your tranny is in good working condition to start with. He can't bandaid issues already present. Tranny tuning is one of things that got him started tuning. His tunes will help the trans perform better. With that much time on your transmissions clock I would do some maintience to it though whether you put on a chip or not.