jerking in front end after

[ole96stroker]

okay guy's couldnt get a answer no where else so im going to ask it here, i have a 1989 ford f250 and i just got done putting a new front end on cause some of my ring gear teeth were broke and my 4x4 wasnt working. So i switched it all out for another f250 front end that i baught thinking it has to be a 4:10s, so i looked at the ring gear on it and it has the same exact amount of teeth as on my old one but i forgot to see if the pinion gear was the same, my gear's are 4:10's in the rear and after i put it all back together my front wheel's want to jerk and act like there kicking back while driving in 4x4. Could the pinion's be diffrent? thanks

[zpd307]

you could check by rotating the tire with the hubs locked and count the revolutions between the drive shaft and tire.