Now I am not quite sure where to post this but this my question/warning to everyone. My family owns 5 isuzu trooper and well the motors are in my opinion some of the best on the market. Some of them are running 200,000 miles and the most expensive repair being the starter but the trouble lies in the automatic transmission. At about 150,000 miles the transmission begins to slip when it comes to high gear. It will shift into 4th under accel but will downshift to 3rd when you start to cruise. This will continue to 180,000 miles where it will stop shifting peridically. Now they have been checked but nothing has been found. Is there a cheap fix like this lucus i have heard about or something more expensive.

Thanks for any help that you can give me.