Hey I just found out that my 97 has a 99 tranny. As the axle oil seal that i ordered for a 97 was not the same as the one that i had taken off. So my question is, i ordered 97 cv shafts assuming my car had a 97 tranny, are these cv shafts interchangeable?

As far as I know. The only possible mixup would be if you happen to have a VLSD tranny (a very small amount of 99's had VLSD, if I remember correctly).

he is in Canada. most likely has VLSD.

Do you have an ES? If so you're gonna have to return that shaft.