Same basic tranny, I think, 4 bolt oil pan, 722.1xx. As long as the inputs are similar, they should work OK. Maybe not optimal as it is going from turbo to not turbo. The donor transmission will start in second unless you migrate all the wiring from the 300SD to the recipient

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80 300SD (129k mi) 82 240D stick (193k mi)77 240D auto - stick to be (153k mi) 85 380SL (145k mi) 89 BMW 535i 82 Diesel Rabbit Pickup (374k mi) 91 Jetta IDI Diesel (155k mi) 81 VW Rabbit Convertible Diesel 70 Triumph Spitfire Mk III (63kmi)66 Triumph TR4a IRS (90k mi)67 Ford F-100 (??)