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4L65E Transmission

You Can Count On.






General Motors / 4L65E 4-Speed / Automatic Transmission

Know Your Options

So, you're about to spend your hard earned dollar on a transmission for your vehicle and you've taken to the internet to educate yourself about your future purchase. You have three options when it comes to replacing your 4L65E transmission, Used, Rebuilt or Re-Manufactured. Within those options, the savvy consumer is looking for the Best Value, the Best Quality, and the Best Warranty. Let's take a closer look at those three options with the knowledge of those who know them best.

A Used 4L65E Transmission 

Used 4L65E transmissions are no doubt an enticing option because of they’re affordability. However, locating the exact match to your vehicle is difficult and sourcing a properly functioning used 4L65E Transmission may take several installation & removal attempts before getting a good one. This can quickly balloon into a lot of wasted time and money.  


A Rebuilt 4L65E Transmission

The term rebuilt can have different meanings from shop to shop. For example, whether your rebuilt 4L65E transmission will have all of the OE manufacturer updates and upgrades to increase its strength and longevity will vary from shop to shop. A standard rebuild consists of only replacing items that are completely worn out. Items that are marginally still good go back into a rebuilt transmission the way they came out. This is why the average warranty for a rebuilt 4L65E transmission is only 1-Year or 12,000 miles.


A Re-manufactured 4L65E Transmission

A properly Re-Manufactured transmission will have all the OE manufacturers specified updates and enhancements necessary to ensure the proper function and longevity of the transmission for years to come. Assembly should take place in a clean dust free environment, just as it was from the OE manufacturer. A Re-Manufactured transmission should at least have a 3-Year Warranty. Not all Re-Manufactured Transmissions are created equal. Component selection, manufacturing, and testing methods can vary from company to company.

What Makes BestBuy The Nations Leading Transmission Provider?

The Relentless Devotion To Providing The Absolute Best.

The Best Value.

A Re-Manufactured 4L65E Transmission For The Price Of A Rebuild.

The Best Quality.

Each 4L65E Is Engineered To Exceed OEM Specification. 

The Best Warranty.

Industry Leading

5-Year 100,000 Mile

Nationwide Warranty. 

Not Used.  Not Rebuilt.  Re-Manufactured.

Lets Take A Look Inside

Pictured below are just a few of the Updates & Upgrades that go into each 4L65E Transmission. Have Peace Of Mind, knowing that your new 4L65E Transmission has all the Updates developed by General Motors Engineers combined with the Latest Industry Advancements providing Unparalleled OE Strength and Durability.

Complete system correction and recalibration kit installed to address several OE flaws. Modifications include updates to the pressure regulator system and valve body accumulator, as well as an upgrade to Corvette-style servos.


Oversize PR valves utilized to restore hydraulic integrity.


TCC control valve, TCC regulator valve and Actuator Feed Valve updated to address common wear problems.


1-2 Accumulator Pistons, upgraded to aluminum, replace the OE plastic pistons that can cause premature clutch failure.


Tru-Flat stator qualification and machining process.


Sun shell updated to the latest, stronger and more durable design, eliminating common OE failures

Sun shell updated to the latest, stronger and more durable design, eliminating common OE failures


High Energy 2-4 band installed to increase durability over the OE design.


High Energy 3-4 clutch pack, upgraded from 6 to 7 clutches to increase durability and torque capacity.


Completely remanufactured and improved torque converter is tested for leaks lock-up concentricity and balance. Upgrades exceed OE requirements and eliminate the possibilities of front seal leaks, premature bushing wear, and vibration.


All new bushings installed in key locations to improve internal fluid flow control and pressures.


High-Strength 5-pinion planetary assemblies installed in front and rear. 


Completely remanufactured pump with new boost valves, vanes, and CNC machining, provides consistent internal pressures, and eliminates delayed engagement.

The Result?

Let The Length Of Our Warranty Be A Testament, Of The Faith We Have In Our Product.

Having one of the industries longest warranties is great, however, standing behind it is where we really like to shine

Here For You Now, There For You After.

Nationwide Coverage

You are covered anywhere and everywhere in the continental United States.

Instant Replacement

A replacement transmission is sent to you as soon as your warranty claim is submitted.

Paid Parts & Labor

If  your  transmission  is professionally installed we cover $50 an hour to repair or replace it.

Q. If I install the transmission myself, will it still be covered under warranty?
A. Yes, self-installation is covered. Labor is not. 
Q. How does the warranty work?
A. In the event there is an issue with your transmission simply take it to ANY nearest service facility in the continental United States and we handle it from there. 

Free Shipping.

With Six Strategic Warehouse Locations Across The U.S. BestBuy Transmission Has A Unique Advantage. 

Get what you need, when you need it. Whether you're out in the sweltering Mojave Desert watching the occasional tumbleweed skip by, or enjoying the utter chaos of New York City, we've got you covered with a transmission waiting nearby.

Q. How long will it take?

A. Your transmission will arrive within 5-7 business days. 


Q. Can the transmission be sent to my home?

A. Yes, it can. Residential (limited access/lift-gate) deliveries are $50 total, for the delivery of the new transmission and return of the old core. 


Q. What if its Sold out or I'm in the middle of nowhere?
A. In most cases you will still receive the transmission within 7 business days.


Q. How do I return the core?

A. Simply place your old core in the container the new transmission came in and submit your core return request online using the core return tab above.

Put To The Test.

HOT-Tested.  COLD-Tested.  LOAD-Tested.

Each 4L65E Is Fully Dyno-Tested.

Money Back Gaurantee. 

If you are not completely satisfied with your transmission when it arrives, send it back for a full refund.

Our 4L65E is the functional and visual equivalent of a new transmission. If for any reason it does not meet this description we want it back.
No Core Deposit.

We do not charge a core deposit. However, we do need your old core back. Return shipping is pre-paid.

No Guesswork.

Whether you order online or by phone each 4L65E is first verified by your VIN #. We then provide you with a direct replacement match.

How Do I Order?

We Accept all major Credit and Debit Cards. You may also pay with a check by phone.

Q. Does my old transmission core need to be out when the new transmission is delivered?

A. No, you have 14 days from the date of delivery to return your core. Need more time? No problem, just let us know.


Q. What will I need to order?

A. Vehicle VIN # and current mileage.


Q. Can I install it myself?

A. Yes, Self-installation does not void your warranty.


4L65E Transmission | 2001 Thru 2008

Removable Bell-Housing w/ Torque Converter

This Transmission Will Fit:

Years:  2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008

Makes:  GM - Chevrolet - Buick - GMC - Pontiac

- Cadillac - Oldsmobile - Hummer

Models:  Avalanche - Hummer H2 - Escalade - GTO - Rainer - SSR - Sierra 1500-3500 - Silverado 1500-3500 - Suburban - Tahoe - Trailblazer - Yukon

Engines:  4.3 - 4.8 - 5.3 - 5.7 - 6.0

Drive: 2WD or 4WD


4L65E Transmission | 2009 Thru 2016

Removable Bell-Housing w/ Torque Converter


This Transmission Will Fit:

Years: 2009 - 2010 - 2011 - 2012 - 2013 - 2014 - 2015 - 2016

Makes: GM - Chevrolet - Buick - GMC - Pontiac - Hummer

Models: Astro Van - Avalanche - Blazer - Canyon - Colorado - Hummer H2 - Hummer H3 - Envoy - Express - S10 Truck - SSR- S15 - Sonoma -Safari - Sierra 1500 - Silverado 1500 - Suburban - Tahoe - Tracker - Trailblazer - Yukon

Engines: 4.3 - 4.8 - 5.3 - 5.7 - 6.0

Drive: 2WD or 4WD


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Now Only

                                   Reg. $1,995

                 Savings Event.     -400

                          Now Only. $1,595

Now Only


  • Torque Converter.

  • Delivery.

  • Core Return.

  • 5-Year Warranty.

  • Peace of Mind.


  • Torque Converter.

  • Delivery.

  • Core Return.

  • 5-Year Warranty.

  • Peace of mind.

                                   Reg. $1,995

                 Savings Event.     -400

                         Now Only. $1,595

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or call  800-588-4148

or call  800-588-4148



You don't have to take our word for it, Best Buy Transmission customer reviews can be found from many different reputable sources online.

We understand you may be hesitant to order a transmission online or by phone, which is why we urge our customers to read our reviews. 

See More Reviews by Clicking HERE

Here To Help.

Whether you need a quote or availability on a transmission or are simply seeking more information we are here to help.


PS: The price you see really is the price you pay. There are no additional fees aside from residential delivery ($50). 

BestBuy Transmission is headquartered in Boca Raton, Florida. However, we are a nationwide operation, serving customers through locations across the U.S.

Who Relies On BestBuy?

Here Are Some Of The Name's That Trust BestBuy Transmission For Their Powertrain Needs.

Monday Thru Friday
9am To 5pm
Eastern Time
Corporate Offices:
1900 Glades Rd. Suite 500
Boca Raton, FL. 33431
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BestBuy Transmission LLC. is a privately held, volume wholesale and retail provider of transmissions to the personal, business and government sectors. The unequaled ability to provide nearly any transmission, when you need it, where you need it, with one of the industries longest warranties, are just a few of the points that make BestBuy transmission a provider unlike any other in the industry.


Our company is founded on the sole principle of providing the very best and we will settle for nothing less. From the quality and value of our product to your experience as our customer, providing the best has made BestBuy Transmission the preferred choice among the public and professionals alike.


BestBuy Transmission is headquartered in Boca Raton, Florida. However, we are a nationwide operation, serving customers through locations across the U.S.

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7-10 Business Days


7-10 Business Days


7-10 Business Days

Best Buy Transmission, llc.  |  1900 Glades Rd. Suite 500 Boca Raton, Fl. 33432  |  Copyright © Best Buy Transmission LLC.