yes, the wrangler bellhousing will bolt to the older 4.0s :thumbsup:
keep in mind that the wrangler trans will rotate the t-case up a bit higher than a stock MJ. puts it real close to the floorboards, but it should be fine (and give better ground clearance). several guys have used the wrangler trans. you'll want to grab a shifter from an MJ/XJ though, as the wrangler one is different and doesn't fit well in the MJ cab. also you'll need MJ/XJ t-case shifter brackets/linkages.