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4R100 Transmission

You Can Count On.







Yep, It's Really That Easy.

America's 4R100 Transmission Supercenter!



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4R100 Transmission | 1997 Thru 2005

7.3L & 6.8L Applications Feature a Triple-Disk Billet Cover Torque Converter

This 4R100 fits all Year, Make & Models Below:


Years: 1997 - 1998 - 1999 - 2000 - 2001 - 2002 - 2003

            2004 - 2005 


Makes: FORD



  • 1999–2004 Ford  Lightning (F-150 SVT)

  • 2002–2003 Ford  F-150 Harley-Davidson Edition

  • 1999–2003 Ford  F-150 7700 Series (LEV-Low Emissions)

  • 1999–2003 Ford  F250 - F350 - F450 - F550 Super Duty

  • 1999–2003 Ford  Expedition (with 5.4 V-8)

  • 2000–2003 Ford  Excursion

  • 1997–2004 Ford  E-Series


Engines:  5.4 - 6.8 - 7.3


Fuel: Gas & Diesel


Drive: 2WD or 4WD

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Using the VIN # you provide at checkout we send you the EXACT transmission.

Inventory is updated every 15min.

All products are subject to availability.


SHIPS IN: approx. 1-3 Business Days


  • Heavy Duty Billet Torque Converter

  • Delivery

  • Core Return

  • 5-Year Warranty

  • Peace of Mind

4R100 Transmission | 1997 Thru 2004

7.3L 6.8L Applications feature a Triple-Disk, Billet Cover torque converter! 


FLASH SALE!........-600

Total Price...........$2,795

What Makes Best Buy Transmission

A Leading Transmission Provider?

Our Relentless Devotion To Providing The Absolute Best.

The Best Value.

A Re-Manufactured 4R100 Transmission For The Price Of A Rebuild.

The Best Quality.

Each 4R100 Is Engineered To Exceed OEM Specification. 

The Best Warranty.

Industry Leading

5-Year 100,000 Mile

Nationwide Warranty. 

Not Used.  Not Rebuilt.  Re-Manufactured.

Let's Take A Look Inside

Pictured below are just a few of the Updates & Upgrades that go into each 4R100 Transmission. Have Peace Of Mind, knowing that your new 4R100 Transmission has all the Updates developed by Ford Engineers combined with the Latest Industry Advancements providing Unparalleled OE Strength and Durability.
  • A Heavy Duty Shift kit is installed to reduce slippage and increase durability. (Shift firmness remains factory)


  • An Upgraded locking snap ring for the coast clutch and spiral-lock snap ring for 4th clutch address OE design flaws and eliminate premature failures.


  • A One-Piece rear case bushing improves internal fluid flow and lubrication.


  • The center support is machined and modified to accept a snap ringThis prevents the center support bolts from walking out. (A very common problem)


  •  A New pressure regulator and boost valve system eliminate delayed engagements, soft shifting and shudder.


  • An upgraded long-spline center shaft drum is installed on all diesel and V10 units.

  • A Heavy Duty Triple-Disk, Billet Cover Torque Converter is provided with all diesel & v10 units. The 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 are installed in key locations to improve internal fluid flow control and pressures.

  • The fluid pump rotor and pump body mating surfaces are resurfaced and new line bore bushings are installed to maintain correct fluid pressures.

  • All machined surfaces and bushings are polished to a mirror-like OE finish of 15RA or better.

  • A Tru-Flat stator qualification and machining process is utilized to meet or often exceed factory specification. Ensuring like-new or better performance from your transmission.


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

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

Q. If I install the transmission myself, will it still be covered under warranty?
A. Yes, self-installation is covered under warranty. 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. The estimated length of time it will take to assemble, test, and ship your transmission can be found above the "add to cart" button below.


Q. Can the transmission be sent to my home?

A. Yes, it can. Residential (limited access/lift-gate) deliveries are $100 total, for the delivery of the new transmission and return of the old core. 


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 4R100 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 4R100 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 4R100 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.

Let's Review.


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.


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 schedule your core return. Need more time? No problem, just let us know.


Q. How is the transmission shipped?

A. Transmissions are shipped via truck freight (18-Wheeler) through FedEx Freight or R&L Carriers. Depending on your location another carrier may be chosen to better service your area.


Q. How is the transmission packaged?

A. Your order will arrive securely strapped inside a sealed high strength polyethylene (plastic) container.


Q. How do residential deliveries work?

A. For residential deliveries, the carrier must transfer your transmission onto a smaller truck for delivery. The carrier will then call you directly to schedule an appointment for delivery. Because of the extra steps involved residential deliveries are $100 extra.


Q. What else will I need for install?

A. Depending on your transmission type some external components may need to be transferred over from your original transmission. For example, the neutral safety switch, speed sensor, tailhousing etc.


Q. Does the transmission come with fluid? What ATF fluid will I need?

A. Your transmission will arrive with approximately 1-3 quarts of full synthetic ATF in it from testing. The torque converter is already primed with fluid and does not need to be removed. You will have to top the transmission off with fluid before operating. We recommend using our full synthetic ATF or any popular brand full synthetic ATF.


Q. What's the total cost?

A. The price you see truly is the price you pay, no smoke and mirrors here folks!

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Ford / 4R100 4-Speed / Automatic Transmission

Know Your Options

So, you are 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 4R100 transmission:

    • Used 

    • Rebuilt 

    • Re-Manufactured


  • Within those options, the savvy consumer is looking for the 

    • Best Value

    • Best Quality

    • Best Warranty 


Let's take a closer look at those three options with the knowledge of those who know them best. The information below is not intended to sway your decision toward one option or another. It is simply a summary of our experience within the industry. Ultimately only YOU know which option will fit you best.

A Used 4R100 Transmission 

Used 4R100 transmissions are no doubt an enticing option because of they’re affordability. However, locating the exact match to your vehicle can be difficult and sourcing a properly functioning used 4R100 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 4R100 Transmission

The term rebuilt can have different meanings from shop to shop. For example, whether your rebuilt 4R100 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. Have you considered why the average warranty for a rebuilt 4R100 transmission is only 1-Year or 12,000 miles?


A Re-manufactured 4R100 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.

Here Are Some Of The Names That Trust BestBuy Transmission For Their Powertrain Needs.

Who Relies On BestBuy?



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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