I installed the six inch SJR lift and 215/75/r15 BF Goodrich all terrains. When I hit about 40mph I get a faint "wop wop wop wop" on the front right side.......like an axle. Only accelerating ( like an axle) not on downhill or coast

 

Goes away at about 55mph.

 

Alignemt shop didnt find any problems ( second time back)

 

Any Ideas?- though about balance but that would wop wop at all speeds

My vote is on wheel bearing. Could be an axle but they usually click, not wop haha. Also check how tight your axle nut is.

An old joke about tires just popped into my head. :-P I won't post it.

 

Tires that size when out of balance will tend to start wobbling around that speed and after about 50 will go away until you get to about 80, then it will come back. U joints also act kinda like that. Wheel bearing sounds kinda likely too. Does it change any if you wheel it hard around a curve?

Noise changed on thw way home from wop wop ( yeah, I know that joke) to a wop wop and a high pitched squeak. only in acceleration. Bout 90% sure its a wheel bearing