The end view of the YJ soft top retainer. On the TJ, whether you got a hardtop or soft top, the channel the soft top hooks into is already attached to the body. It is spot welded on the top edge of the body tub from the door opening around to the tailgate opening on both the passenger and driver's side. On the YJ, the channel for the soft top was an extruded piece of aluminum and you only got it if you optioned the soft top. And then, it was bolted to the body tub. On the left is the stock YJ part. On the right is a modified unit to better work with the TJ top. This modification makes the lower edge of the soft top side windows sit flush with the body, just like on the TJ. If you opt to not modify this channel, you will have to trim down the plastic on the TJ window that attaches to the tub. Since we wanted to be able to just order a TJ top and have it fit next time, we took our time this once and trimmed the aluminum down to fit