Gday guys. Newb here. I have 2 sets of fj40 axles. Both are front rotors and drum rears. Only difference I notice are 2 different size pinion nuts. I’m assuming on is a corse spline and the other more desirable fine spline. I’d like to rebuild one set but am unsure what year these are. Makes ordering parts feel like I’m not sure what I need to order. Could you help? Thanks. I’m in Canada. Suggestions on where to buy parts would be helpful too.