[whirnot]

Be careful with youtube videos. That guy says to set your preload just where it was. You are taking it for granted that it was right. I took a rear end apart just yesterday that the pinion nut was actually loose.
I just took my first 75 mile drive with my new Mitchell.
The first time I used it, I thought I had an issue with my pickup because it lacked power. It was a windy day. Later I thought, of course it has less power, you are in a higher gear!
If you have realistic expectations, it's wonderful. Especially for splitting gears. Two high, fits the gap that is normally an issue with model As. I am one of the few that has a cable shifter, and I would not have it another way. Split shifting from two high to third low and back and fourth is easy! Not sure why do few use it.