How dirty is your outdoor coil? Tranes are generally easy on fan motors... unless proper maintenance is not being done.
AOP is Ask Our Pro's. This is still not DIY, as we will not walk you though the process of replacing any part of you system and or functional parts of the system.
I will gladly give you my 'professional' insight. If your system parts warranty was out two years ago, the aftermarket replacement motor would still have been the decision. Motor horsepower is nothing but a manufacturers numbers game. What's important is amp draw, do not use one in that's numerically lower than the original (the amp draw of OEM can be found on the data sticker with the model and serial numbers) and the rpm. A new capacitor is always recommended with a new motor.
Best of luck with your adventure