All EXtreme Automatics™ builds are dyno-tested!


Click HERE to see our trans-dyno in action!
•••
TH200-4R
TH200-4R

***Please read descriptions in their entirety. Images are for illustrative purposes and may NOT ACCURATELY depict each product. It is your responsibility to be well informed before ordering. Please read our Terms of Use for specifics.***

. . .

EXtreme Automatics™ put the 2004R on the map in the automatic overdrive 4sp market.

We have been building and modifying the 2004R for 18 years. We have the fastest most reliable 2004Rs in the industry. We are famous for the transmissions we have built for the Buick Grand National. We also build units for Street Rods, Hot Rods and many other applications. From stock to 1000HP.

EXtreme Automatics™ developed a VB (valvebody) 6 years ago we call the BRC™. This VB was developed on the Answermatic VB Machine to duplicate the performance of the much desired and expensive Grand National BR VB. We are the only company who can duplicate the BR VB. That allows us to sell our 2004Rs out the door only requiring a $200.00 core charge. We also have 30+ GM BRF & CZ cores in stock for those who want to exchange their transmission for the real GM version.



EXtreme Automatics™ put the 2004R on the map in the automatic overdrive 4sp market. We have been building and modifying the 2004R for 18 years. We have the fastest most reliable 2004Rs in the industry. We are famous for the transmissions we have built for the Buick Grand National. We also build units for Street Rods, Hot Rods and many other applications. From stock to 1000HP.



Dues to the rising core cost of 2004Rs and the difficulty to find them We must implement a core charge of $200 across the board. The core charge of $200 is refundable if a core is returned in 30 days. Cores not returned in the specified 30 days will not be refunded unless other arrangements are made. Extreme Automatics will pay the return shipping cost on the core return if shipped on our account.
We will refuse cores not shipped on EXtreme Automatics™ account.



Back to top

All EXtreme Automatics™ TH200-4Rs include:

  • TH200-4R EA SuperPump
  • Pump:
  • The EA™ Super Pump™ is the heart of the 2004R build.
  • The EA™ Super Pump™ is the heart of the 2004R/700R4/4L60E build.
  • We first start by parallel decking the pump halves to a perfect 90° center line of Stator.
  • We Machine lap to a fine finish and maximum of .001" Slide Clearance.
  • Pump Drains are drilled to releive Excess pressure on the pump seal.
  • We install a Teflon® coated bushing staked in place.
  • The pump is ported for maximum fluid flow.
  • The Max pressure circuit is enhanced to allow for a Max of 325 psi
  • A New Hardened Stator support is installed.
  • Matched Rotor and Slide assembly to keep Maximum Clearence to .001"
  • 7 Vane Rotor used for Strength and Volume Except 4L60E.
  • The Pressure Regulator Modified to allow for accurate Pressure control and slightly increased Lube.
  • Pressure Regulator Spring is Variable Rate to allow for quick line pressure changes
  • Boost Valve Assemblies .500/.367 to compliment the Quick Ratio PR Spring
  • The EA™ Super Pump™ will supply up to 300 psi HOT with increased Volume earning the name Super Pump the best in the industry.

  • Internals
  • Direct Drum - Ground to ensure Roundness. Lube modification (Stage 2-3 Models) To Aid in cooling of the drum and band Lubrication.
  • TH200-4R Low Roller
  • L/R Center Support - Fitted with a Torrington® Bearing in lieu of Thrust washer to handle thrust load
  • Center Support - Pressed Apart and sealed. Teflon® Sealing Rings used to eliminate cross leaks. Machined for Torrington® Bearing OD Ring Gear (Stage 3 only)

  • Sun gear Shell - Hardened Sungear Shell installed all units.
  • TH200-4R OD Planet
  • Planets - All Planets are disassembled and rollers are replaced with Pins as Needed. New Race and wear washers are used in all three planets. (Stage 3 Only The pins are replaced with through hardened 300M pins with new race and wear washers welded in place.)

  • Sprags (Roller Clutch) - All Models are Fitted with new Borg Warner Sprag assemblies in OD and Low.(Stage 3 fitted with HD Chrysler Rear Roller Clutch. )

  • Bearings - Torrington® Bearing replaced through out unit.
  • Washers - New thrust washers All Units
  • Pump thrust - New AC Delco® pump thrust. ( Stage 3 is Torrington® Bearing)

  • TH200-4R Billet Forward Drum
  • EA Billet Forward Drum Shaft - ( Stage 2-3 only) The EA™ Forward drum shaft is made with 300M Aircraft quality steel. The shaft is machined then heat treated then finishground to exact specification. This Hi strength shaft is then welded into the Forward drum basket.

  • Clutch **** We Do Not use Clutch Lining made by Alto®****
  • Direct Friction - EA™ Exclusive Hi Energy Carbon. We are the only manufacture that has our own lining to handle Heat and Hi HP.

  • Forward friction - EA™ Hi Energy Carbon. We use a double wave plate to help prevent banging when shifting to drive.
  • Low/ Reverse Friction - EA Hi Energy Carbon
  • Overrun Friction - Borg Warner®
  • OD Friction - Borg Warner® 3 Clutch all Models
  • Steels - Micro Polished Raybestos Steels Used Threw out. We used polished steels as they aid in clutch application and remove heat from the clutch pack. We Never use Koleen steels.

  • Intermediate Band - EA™ Exclusive Hi Static Lining. We use a solid strap and have lined with a Blended Hi Static lining. This lining is not typically used in a shifting band but we found that it will hold more HP shift quicker than any other available lining. As mentioned, our band is a solid strap. The Popular Alto® wide band is 38.5 sq inch of apply area and band lugs do not go all the way across the band to apply the band evenly making good use of the 38.5 sq inch of apply area. They tend to curl up on the ends reducing apply area over time to less than 35 sq inch. Our Band is the std width and has 38.5 sq inch of apply area with lugs that go the width of the band so we are able to use all 38.5 sq inch. This makes for a band that does not wear out on the ends and slowly wear out the valuable direct drum.

  • Servo Assembly “Size does matter” Our servo is a full 2.995" diameter on the apply side. We use a Dual Scarf on the apply side and lip seal on the release side. While one competitor has a similar size servo, its radically different. “Engineering Does Matter” Our competitor uses a 3 piece design. This design allows the pin to float within the apply piston and relies solely on the return spring to push the band pin to keep it tight against the piston. The servo and the pin move independently. A very delicate balance and in some cases can cause premature band failure.The EA EXtreme Automatics™ 2004R Servo uses a one piece design. The design attaches the servo pin and piston assembly to move as one unit. No we have predictable controlled apply and release of the servo assembly. This creates perfect shift timing.

  • Valvebody (BRC) The Brain of the EA™ 2004R is the BRC™. BRC™ simply means BR Calibrated. We took the most popular BR Valvebody more commonly know and exclusively used on the Buick Grand National and basically copied it. After hours on a test bench we were able to see the difference between the Hi Performance BR Valvebody and the standard VB used on most other passenger cars. We then went to work duplicating the performance. What we ended with a Vb that is easily produced with shift like Characteristics of the original Vb used on the Buick Grand National thus the Name BR Calibrated. This was a major step for EA. We became the first builder of the 2004R that did not require and expensive 2004R core from a Grand National or a Monte Carlo SS to build a reliable 2004R with performance shift qualities. We build and sell BRC™ valvebodies to some of the other 2004R builders to this day.

Back to top

Stage 1 2004R • 500HP / 400TQ

  • Build
  • EA Super Pump™
  • Billet anchor pin
  • Tensioned Teflon sealing rings
  • 3 clutch OD
  • Tested and sealed center support
  • Race clearances
  • Heat Treated Forward Drum
  • BR Size Servo
  • HO Low Roller Clutch
  • New OD Roller Clutch
  • Hi Performance Calibrated Valve Body **BRC
  • Lock up or Non Lock-up
  • Governor Calibrated for approx. 4800-5200 RPM shifts
  • $450 Lifetime Freshen up (Original Purchaser)
  • 1 Year Warranty ( 6 months on Forward Clutch Drum Shaft Breakage)
  • $200.00 core charge included in price

Stage 1 2004R • Options

BRF Will require a Core Charge $450
Reverse Manual Valve Body $400

Back to top

$2195.00 + Shipping  • Buy Now

Stage 2 2004R • 750HP / 650TQ

  • Build
  • EA Super Pump
  • Hardened Input Shaft
  • Billet 6061 Aluminum Piston in Forward
  • Billet anchor pin
  • Tensioned Teflon sealing rings
  • 3 clutch OD
  • Tested and sealed center support
  • Race clearances
  • EA Billet 300M Forward Drum Shaft
  • 7 clutch direct
  • EA Billet Extreme Servo (Largest In the Industry)
  • Roller Low Clutch Support
  • HO Low Roller Clutch
  • New OD Roller Clutch
  • Hi Performance Calibrated Valve Body **BRC
  • Lock up or Non Lock-up
  • Governor Calibrated for approx. 4800-5200 RPM shifts
  • $450 Lifetime Freshen up (Original Purchaser)
  • 1 Year Limited Warranty
  • $200.00 core charge included in price

Stage 2 2004R • Options

  • BRF Requires Core Charge $450
  • Reverse Manual Valve Body $400
  • Electric Trans Brake $400 (pan is required)
  • 2.57/1.57/1.00/.67 Gear Set $695
Back to top

$2695.00 + Shipping •  Buy Now

Stage 3 2004R up to 1000HP / 850TQ

  • Build
  • EA Super Pump
  • Billet anchor pin
  • EA Billet Extreme Servo ( Largest in the Industry)
  • EA Billet 300M Forward Drum Shaft
  • EA Billet Vasco Max Input Shaft
  • EA Billet OD Planet
  • EA Steel One Piece OD Ring Gear
  • Billet 6061 Aluminum Direct Clutch Piston
  • Billet 6061 Aluminum Forward Clutch Piston
  • Roller Bearing Low Clutch Support
  • Roller Bearing Pump to OD Shell
  • Roller Bearing OD Ring Gear
  • HO Low Roller Clutch
  • New OD Roller Clutch
  • Maximum Duty Front and Rear Planets
  • 7 Clutch Maximum Duty Direct
  • 3 Clutch OD
  • Hi Energy Direct and Forward Clutches
  • Hi Energy Low Reverse Clutches
  • Lock up or Non Lock-up
  • Deep Cash Aluminum Pan and Botton Feed Filter
  • Hi Performance Calibrated Valve Body **BRC
  • Governor Calibrated for approx. 4800-5200 RPM shifts
  • $450 Lifetime freshen up to the original purchaser
  • 2 Year limited warranty
  • $200.00 core charge included in price

Stage 3 2004R • Options

  • Electric Trans Brake $400
  • Reverse Manual Valve Body $400
  • 2.57/1.57/1.00/.67 Gear Set $695
Back to top

$3695.00 + Shipping • Buy Now

Extreme Shopping Cart
Product Qty Price
To add an item to your shopping cart, click "Add to Cart".
Products in cart: 0
Cart subtotal: $0.00 Empty the cart
Click here to Check Out
Pay securely with any credit card or your PayPal account
Cart technology provided by NeuCart