I dont have the exact answer to your question,but I do know that between the years on 1991-1996 there were no better made automatic transmitions than the ones used in the 300zx then.I had a 1991 300zx 2+2 then and found that information in many articles.So if I know nissan like I do(I have a 2002 Altima 3.5se with the auto-which you can slide over to engage the overdrive-)then id say your pretty safe.BTW did you check on the price of insurance?That was the deciding factor in me getting the 1991 333zx 2+2 auto back then vs the 1991 300zx TT 5-speed. Well the price had a little to do with it but mostly the price of insurance!LOL Well Good luck with the Z
