I don't think the old gearbox changed much over the years. Mine is doing great with Redline MTL synthetic. Do a search- I think you will find that that may be one of the preferred solutions. Heck, you are probably only going to change it once- why not the best?

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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 (??)