You will find that the Trane motor frame size is Y and that most other motors with specs in the range of the OEM motor will be frame size YZ. You will also find that other motors will be of a higher amperage and may run the chance of burning up the control board that powers the blower motor. These motors were manufactured by a company for use in Trane units, making it hard to buy an over-the-counter replacement, it is what I refer to as a "commissioned motor". Best to replace with OEM, the cost of a new control board is not worth the chance. At best, you can move the winding leads on the control board to run the blower at hi speed for whatever function you want more air flow. I believe what your attempting is more air flow for A/C but, you may find that A/C already runs the hi or med-hi windings.