i have a 91 that is in snap ring range. called acura customer service/ client relations had them archive to see if it was done said they could only go back 10 years and did not see it. is there any sources that could look back further or am i out of luck. thanks
That doesn't sound right to me, since their records include recalls for safety reasons. Try again, or let The Kid look it up for you.
However, you need to know that the records that Acura HQ keeps are incomplete; they only keep records of work that was done under warranty for recalls. If the previous owner had the work done (even at an Acura dealer) and paid for it, Acura HQ won't have any records of the work. In that case, the only way you can look it up is if you know which dealer the previous owner would have used, and ask that dealer to look it up in their system.
IOW, if Acura tells you the work was done, it was done; but if they tell you they don't have any record of it being done, it might or might not have been done; in that case, I would just assume it had not been done.
If you don't have any proof it has been done, I wouldn't worry about it; just be aware of the symptoms of snap ring failure (loose shift knob when shifting, etc). If and when the symptoms show up, park the car
immediately, and have it towed and have the work done; otherwise, just keep driving it (but have the parts replaced if at some point you need transmission work, like a clutch or gear replacement).