It depends on what you're doing.



I own a 1995 Flareside with the 300 and the manual (M5OD). That's the same manual that was used on the newer F150s. For towing, the ratios aren't the best. First gear is too high. It's not as stout as the ZF5 was (Used in the 250 and 350), but the M5OD is fine for daily driving.

For towing, though, you'd want the E4OD. If my truck had the auto, it would be rated to tow about 6000#. As it sits, it is only rated for 3000#.