[Tcoat]

Try the ECU reset but if you still have concerns take it to the dealer (if still in warranty) or a shop and have them check it out.
Although guys will try there is no way to actually diagnose if you have a problem much less what that problem could be over the internet.
There is a TSB for a reflash of the auto tranny control modules that could help.
Unless you had some knock going then there isn't really any damage that running the 87 would cause. If you had serious knock and kept pushing the car then you could have some damaged internals. Again that can not be checked over the internet.