Rear belt is the high pressure fuel pump. Top of the engine in the back (drivers side). Love mine. There is a guy on TH-cam who is changing front /rear belts without pulling cab. CP’s garage. I have a 3:55 F150 love it. Wish ford didn’t give up on it and promoted it more but Oo well.
Thanks for the info. Never knew the high-pressure fuel pump was belt-driven. That's kind of crazy. (Sure it's not the oil pump like in a Baby-Max??) Will look out for CP's Garage... the guy sounds like a genius. And, we wish ours was a 3.55!! 3.31 is pretty gutless with a trailer on it.
12:39 Lower axle ratio, taller gearing, less leverage, less output torque at the wheel, and more lugging. Those all go together. Yes, that makes sense.
Here’s the chart that shows all the axle codes and the ratios that they go to: www.morepowertuning.com/axleratiohelp