D44s are also found in MJs w/ the metric ton/big ton payload package.
There are a few on JU that have 88/89 SWB MJs w/ D44 including someone with a SporTruck that actually has a 4.0L, 4x4, and a D44 and A/C(a fully loaded SporTruck is rather...unique).
My 88 and 89 Metric tons both had D44s.
My current 87 XJ waggy has one(funny it's the first Jeep I bought without even looking at the rear end, it was a good discovery!).
Girl I used to know has a D44 on her 89 or 90 XJ Wagoneer Limited. Can't remember which it was.
You CAN find D44s on 90-92 LWB 2WD MJs w/ factory tow package. Possibly on other LWB 2WD years, but I've only seen 'em myself on 90-92s and mostly 92s.
I've seen more D44s on 2WD LWB MJs than I have on XJs.
Last time I was at westwood auto parts they had a 91 LWB 2WD 4.0L w/ the rear axle missing...
In 1986 the MJ w/ tow package got the AMC20 rear...I've seen ONE, and that's the only 20 I've seen in an XJ or an MJ.
Supposedly 84-86 XJs could have the 20...
Teron