Warranty Information
Every part we sell is backed by the manufacturer's warranty plus our own quality guarantee.
Manufacturer Warranty
Products from Sonnax, Raybestos, Alto, Transtar, TransTec, AC Delco, TransGo, and other premium brands carry the warranty terms set by the manufacturer. Most rebuild kits and individual parts are covered for 12 months from date of purchase against defects in materials or workmanship.
Fitment Guarantee
If a part doesn't fit your application as described on our site, contact us within 30 days and we'll either replace it with the correct part or issue a full refund — your choice. We stand behind our fitment data.
What's Not Covered
Damage from improper installation, abuse, racing or off-road use (unless purchased as racing-grade), or normal wear is not covered. Labor costs are not covered — only the cost of the part itself.
How to File a Warranty Claim
- Contact us at info@coretransmissionparts.com with your order number and a description of the issue
- 2. We'll respond within 1 business day with next steps
- 3. Most warranty claims are resolved within 7 business days
We rebuild transmissions ourselves — we know what makes a quality part. If something we sold you isn't right, we make it right.