When i shift into 2nd it feels like the drive shaft is out of balance or something. i just had a 4in lift put on does that have anything to do with it?
Sounds like the angles on your drive shaft are not right . Was it professionally put on ? Mine was doing that when I did a l.o.a. I bought a 4 inch leaf lift with the angle wedges built in and dropped them back under the axle . That took care of my problems .