Frequently Asked Questions

What do I do with my core ?

All you have to do is take your core back to the AutoZone store from which you purchased your transmission. We’ll take it from there.

What about my core credit ?

Once you return your core, you’ll be reimbursed the cost of the core from AutoZone.

What if my core is damaged ?

Not a problem. Our No-Hassle Core Return policy means that your damaged core won’t affect your core reimbursement amount.

What’s my warranty?
  • You get a 3 year/unlimited mileage warranty on standard and commercial applications. Click here for more National Powertrain warranty information.
What if I sell my vehicle before the warranty expires?

Because your National Powertrain transmission warranty is attached to your vehicle’s VIN, it’s still covered, regardless of ownership.

What if I have a warranty issue?

Even though we have the lowest rate of failure in the industry, warranty claims happen. Should you need to start a claim, call or text 855-870-9696, or email support2@etereman.com

What do I need to start a warranty claim?

To start a claim, please have your full VIN, serial number, current mileage, customer complaint, codes, and fluid condition/fill level.  Also, to ensure a quick turnaround from our technicians for a diagnosis, please have the vehicle at the repair facility that will be doing the warranty work. 

What if I have technical questions?

Need technical help? Call or text 855-870-9696 with questions or email support2@etereman.com. 

What kinds of updates does National Powertrain do to its transmissions?

Each transmission that National Powertrain produces is fully remanufactured and meets or exceeds OE requirements. In addition to replacing worn or broken parts, our Research and Development department has identified points of failure in the original design that are corrected in the manufacturing process. To top it all off, each unit is dyno tested using simulated road conditions to make sure it’ll perform for you.

How soon will my transmission arrive?

On average, we have 5,000 in-stock, ready-to-ship transmissions. If your transmission happens to be one of those, you can expect to see it within 48 hours. If the transmission you need is still in the remanufacturing process, shipping times will vary.

Where are your warehouses located?

In addition to our primary remanufacturing facility in Milwaukee, Wisconsin, we have AutoZone Mega Hubs to provide fast nationwide shipping.