spider,
How many miles on the car? There are a few things here to consider. ALL snap-ring transmissions are not bad. There is really no way to tell, trust me I have tried.
If the car has higher mileage and has not failed I would not be overly concerned.
I would negotiate a $1500-$2000 discount. That is what I did. My car has 33K miles now, I purchased it with 17K miles, in the range and all is well. Heck, I have forgotten about it, it's been three years!
I understand the ideal situation of getting it repaired and not worrying. But....has a NSX transmission outside the range ever broken a snapring?? Well, the answer is yes.
If you really cannot bear to deal with it as is, then by all means change it immediately if you purchase the car.
How often is the possibility that you are actually going to get stuck out in the middle of nowhere??
I have chosen this route:
I am not doing a preventative repair. If my snapring breaks, I will tow the car home and change the trans case and install a new clutch. If my clutch goes, I will replace the trans case and the clutch. Whichever comes first.
If the car has any kind of mileage at all, let's say +30K you WILL do a clutch, when you do the snapring. Not doing so would be like changing the timing belt and not the water pump. Just not a cost effective idea, IMO. It will only cost you the price of the clutch, since the trans is out anyway. So you should think in terms of $2700 total. (stock clutch pricing + snap ring stuff + labor in this total number)
Just one more point, my NSX is NOT my daily driver. If it were, I may have a different outlook on it, and have the work done.
Remember I did save that $2k going in. I buy oil filters with the interest
.
HTH,
LarryB