Transmission Rebuild in Glendale, AZ

Sun West Transmissions — Glendale, AZ. Free estimates, honest diagnosis and a 3-year / 40,000-mile warranty on qualifying rebuilds and replacements.

Complete Transmission Rebuilds in Glendale

When a transmission has internal wear or damage, a rebuild restores it by replacing the parts that wear out and correcting known weak points. Done properly, a rebuild can give your vehicle many more years of service. Sun West Transmissions is a dedicated transmission shop at 6116 West Northern Ave, and every transmission rebuild in Glendale, AZ that we perform starts with a careful diagnosis and a free estimate.

A rebuild is not the right answer for every problem. We will tell you if a smaller repair can solve the issue, and we will explain why when a rebuild is the better choice.

When Does a Transmission Need a Rebuild?

A rebuild is usually recommended when the transmission has internal mechanical damage that cannot be fixed from the outside. Common situations include:

• Slipping caused by worn clutch packs or bands.
• Loss of one or more gears, such as no reverse or no third gear.
• Burnt fluid with heavy friction material or metal debris in the pan.
• Internal hard-part failures, such as broken sun shells, drums or planetary gears.
• Repeated overheating that has damaged seals and friction material.

Not sure if that describes your vehicle? Our signs you need a new transmission guide can help.

What Happens During a Rebuild

1. Removal: the transmission is removed from the vehicle.
2. Teardown: it is fully disassembled, and every part is cleaned.
3. Inspection: hard parts such as drums, shafts, gears, pumps and the case are inspected for wear, cracks and damage.
4. Replacement: all clutches, steels, seals, gaskets and rubber components are replaced, along with filters and any worn bushings or hard parts.
5. Updates: known weak points are addressed with updated or improved parts when available.
6. Valve body service: the valve body is cleaned, inspected and repaired or replaced as needed. See our valve body repair page.
7. Torque converter: the converter is replaced or rebuilt, since a worn converter can contaminate a fresh rebuild.
8. Cooler flush: cooler lines and cooler are flushed or replaced so debris does not return to the rebuilt unit.
9. Reassembly and installation: the transmission is reassembled to specification, installed and filled with the correct fluid.
10. Road test and relearn: we road test and perform any required adaptive relearn or programming.

Rebuild vs Replace

A rebuild keeps your original transmission, which can be an advantage because it was matched to your vehicle at the factory. Replacement with a remanufactured or used unit may make more sense when the case or major hard parts are damaged, or when the vehicle’s value calls for a lower-cost option. Our rebuild vs replace guide explains the trade-offs, and our transmission replacement page covers the alternative.

Transmission Rebuild Pricing

For popular GM transmissions, we offer confirmed starting prices that include removal and installation:

• GM 4L60E rebuild from $2,795
• GM 4L80E rebuild from $2,995
• GM 6L80E rebuild from $4,495
• GM 6L90E rebuild from $4,795

A billet torque converter upgrade adds about $300. See our 4L60E rebuild prices and 6L80E rebuild prices pages for details. For every other transmission, cost depends on the vehicle, what we find during teardown, the parts required and any upgrades you choose. Call for a free quote. Our rebuild cost guide explains the factors involved.

Upgrades During a Rebuild

A rebuild is the ideal time to make a transmission stronger, especially for trucks that tow or vehicles with added power. Options can include upgraded clutch packs, improved valve body components, stronger hard parts and heavier-duty torque converters. Read about the possibilities on our transmission upgrades page.

Our Rebuild Warranty

Qualifying transmission rebuilds are covered by our 3-year / 40,000-mile warranty, with no deductible on covered repairs. We explain the coverage before work begins so you know exactly what is included. Financing is available if you need to spread out the cost.

How Long Does a Rebuild Take?

Time depends on the transmission, parts availability and what we find during teardown. We will give you an estimated timeline when you approve the work and keep you updated if anything changes.

Caring for a Rebuilt Transmission in Arizona

• Follow the break-in guidance we give you after the rebuild.
• Service the fluid on schedule, especially in summer heat.
• Keep the engine cooling system healthy.
• Consider an auxiliary transmission cooler if you tow.
• Bring the vehicle back promptly if anything feels different.

Transmission Rebuild FAQ

Is a rebuilt transmission as good as new?

A quality rebuild replaces all wear parts and addresses known weak points, which can make it very durable. Results depend on workmanship and parts, which is why we do the work in-house.

Can you rebuild any transmission?

We rebuild most automatic and manual transmissions for cars, trucks and SUVs. Call us to confirm for your vehicle.

How do I get a rebuild estimate?

Call (623) 473-9800 or visit our Glendale shop for a free estimate.