Transmission pops out of 2nd and 4th gear after lift install

One of two things caused that to happen, either a body lift or a transfer case drop was installed. Either of those increases the distance between the transmission and the rubber shift boot which reduces the amount of throw the shifter has so it can't quite fully shift into the gears. The taller the body lift and the deeper the tcase drop, the worse this problem is.

The fix is to move your console slightly to better center the shifter boot over the bottom of the shifter, or buy a more flexible, like made from leather, shift boot.
 
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Reactions: Dunkut88TJ
What he said above! You lifting everything upward and you change the angles and reach of many other items.
 
Short throw shifter fixed my issues after the body lift and transfer drop.