soft top
 

what is the piece that goes in between the upper door and top my buddy bought a yj and it doesnt have that piece and i cant think what it is called

yj's shouldn't have it, its the door surround.

im thebuddy he was talking about culd that mean tops wrong its my first jeep so trying to get it up to par

so only the tjs have those the yj i had had a hard top and hard doors so i figured the yjs did to

Square door uppers or round door uppers?

If they are square I will get some pictures of my factory soft top on my 90 YJ if your interested. But the way the top holds to the frame is all built in to the frame. Should be an upright piece, that runs right near the B pillar.

Correct. But with that being said it is possible to use a TJ top on a YJ with some retrofitting. Easiest is a new cage with the TJ door surrounds. Or trade/sell the top for a YJ top.

Besttop makes a replacement top for a YJ with the rounded upperdoors and it gets rid of the factory "sliding" tract for the top. The side bars look like a 'Y'. It's a pretty nice top. If that is what you have you'll just need the correct 1/2 doors. or visa versa.