Skip to main content


Your Gearstar Performance Transmissions re-manufactured transmission(s) is(are) warranted against failure due to workmanship and/or parts used in the re-manufacturing process for a period of 36 months or 36,000 miles, which ever comes first from the date of shipment. In the rare event that you should experience a problem with your transmission(s), we request that you call our technical service line at (330) 434.5216. Please call us before attempting to repair or remove the transmission – we will work with you to ensure there is a reason to do so. Any unauthorized internal tampering or alteration will VOID transmissions warranty. This excludes regular maintenance i.e. fluid/filter and pan gasket.

We may ask you to ship the transmission back to us or take it to an A.T.R.A. approved professional transmission or reputable repair facility in your area. If we chose to send your transmission to a local shop, Gearstar Performance Transmissions must authorize any repairs before physical work is performed. We will coordinate with that facility to ensure the transmission is in perfect working order. Gearstar Performance Transmissions is not responsible for labor, parts or fluids incurred to remove or replace the transmission. If the transmission has to be replaced, we will work with you to ship you another unit. Gearstar Performance Transmissions reserves the right to have the transmission returned to us for repair or replacement.

The customer will be responsible for parts and labor or replacement of the unit if:

  • Physical Alteration or Improper Installation
  • Improper or Neglect of Maintenance
  • Operator Negligence
  • Incorrect Application
  • Incorrect Installation
  • Accident or Abuse to this product

If failure is due to faulty materials or workmanship, we will repair or replace the transmission at not cost to you, PERIOD! If failure is caused in no way by faulty materials or workmanship, we will fix the transmission and you will be billed only at cost. The customer is responsible for return shipping expenses which will include our freight discount, if the failure is at the fault of Gearstar Performance Transmission, we will credit the shipping cost back to you.

This warranty expressly does not cover loss or injury from the use of the product. This warranty is non-transferable. Gearstar Performance Transmissions reserves the right the change the terms and conditions of this warranty at any time.


Failure to follow instructions will result in void of warranty.

Core transmissions must be received by Gearstar within 30 days of receiving your new transmission to be considered eligible for a credit or refund.

*All transmissions may not qualify for the 36 month / 36,000 miles warranty. Certain transmissions will be noted in the transmission description if they do not qualify.

Ford High Performance Automatic Transmissions | Gearstar Performance

Ford Transmissions

GM High Performance Automatic Transmissions | Gearstar Performance

GM Transmissions

Mopar High Performance Automatic Transmissions | Gearstar Performance

Mopar Transmissions