Well, Rave says this for a D2 :
"Gearbox oil:
Use of gearbox oils other than those specified may result in serious damage to the gearbox,
Manual Gearbox:
Use Texaco MTF 94 oil for refill and topping-up. If MTF 94 is not available, ATF Dexron IID or ATF Dexron III may be used...