How long does a rebuilt transmission usually last?

Summary:

Jaden frames longevity as partly dependent on how the customer maintains the vehicle, but he spends most of the answer on why a properly rebuilt unit should outlast the original. Part of the rebuild process at the shop is performing all available updates to the transmission. He explains that every transmission has updates, and that these come from aftermarket companies that identify common factory failure points and engineer fixes for them. His example is valve and valve body wear, where the available remedies include installing sleeves or re-boring the bore to accept a larger valve. Because those updates correct weaknesses the factory unit shipped with, he states the rebuilt transmission should be a better unit than the original and should outlast it, provided the owner takes care of it properly.

Answer:

So part of that depends on how you take care of it. Part of the rebuild process is also doing all of the updates to the transmission. Every transmission has updates to it, and the updates are the aftermarket companies. They find these common failures and they make fixes for them. Like a lot of the ones that are wearing out the valves and the valve bodies, they have sleeves for them, or we re-bore it with a bigger valve. And so the updates that we do to them are supposed to make it a better one than from the factory, so it should outlast the factory one, provided you take care of it properly. That's really the goal with the way we build them. We're not just putting it back the way it was, because the way it was is what failed. We're correcting the things that are known to fail on that unit while we have it apart, and then how long it lasts from there comes back to maintenance.