Maybe...I have removed two in the junkyard without loosening nut....just slid right out....
The nut is not on very tight....I have used large channel lock pliers and chain strap wrenches before....
Be sure to closely mark the two sections like the are mated before pulling....mark very close with a fine scratch awl or such....

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1978 Yellow 300D (The Mustard Toad)
1980 Blue 240D (The Iron Toad)
1989 Grey Mitsu.4WD Mighty Max Pickup (Needs a Diesel transplant bad)

(Open the pod bay doors HAL)