I have 2011 jku auto w/2.5 terraflex lift with 35 12.50s..i have a kinda steep driveway..when backing out if i ease into tge gas it is fine but if i give alot of gas it feel like it is shaking and maybe surging alittle. This is my first jeep and it didnt do it before i had lift installed.. is this normal? I dont think it is? Thanks for any input in advance!!