Availability
Sonnax Smart-Tech drum modules for racing GM TH400 transmissions improve on-track performance and consistency, leading to quicker ETs, more wins, and greater reliability. The TH400 is preferred for its overall durability and multitude of available ratios, but is known to be heavier and less efficient than the popular two-speed Powerglide. Part of the TH400 inefficiency results from the fact that the direct drum counter-rotates, spinning backwards in 1st gear, brakes to a complete stop on the 1-2 shift, then goes from 0 RPM to input RPM on the 2-3 shift. Significant energy is wasted through this cycle that robs power, upsets traction on the shifts, and contributes to broken internal parts. Compared to aluminum direct drums, the Smart-Tech drum module reduces the weight of the counter-rotating components by over 3.3 lbs.! And more significantly, because the weight of the Sonnax counter-rotating parts is closer to the centerline, there's a 68 percent reduction in energy required to stop and restart during the 1-2 and 2-3 shifts. The benefits are increased wheel horsepower, better acceleration, less shock on the shifts, and improved durability. * Complete kit (34555-01K) replaces both forward and direct drums and includes everything from intermediate sprag to the pump; a selection of Sonnax input shafts is available separately. * 100 percent new content, no used core pieces * Includes larger-diameter, 36-element sprag and sprag race that works with OE intermediate clutches * Includes six-friction forward clutch pack and seven-friction direct clutch pack Contents: * Forward Piston Housing * Forward Piston * Forward Piston Return Springs (16) * Forward Spring Retainer * Forward Snap Ring * O-Ring 1.674 in. * Lip Seals (2) * Direct Housing Assembly * Direct Piston * Direct Piston Return Springs (26) * Direct Spring Retainer * Direct Snap Ring * O-Ring 2.737 in. * Sprag Shaft * Front Sprag Retainer Plate * Heavy-Duty Sprag 36 Element * Outer Sprag Race * Rear Sprag Retainer Plate * Sprag Retainer Screws (4) 6-32 x 5/16 in. * Quad Ring Seals (2) * Anti-rotation Seal Rings (2) * Drum * Pressure Plate * Outer Snap Rings (4) * Bearing Small * Forward Clutch Hub * Bearing Large * Direct Clutch Hub * Steel Clutch Plates (4) .060 in. * Steel Clutch Plates (11) .077 in. * Friction Clutch Plates (13) .080 in. * Clutch Separators (60) .103 in.
Not Yet Reviewed
$3,004.99
On and off the track, time is your most precious commodity. Brinn original transmission modules are the fastest way to purchase all of the Brinn drivetrain products that your race car requires. These kits eliminate the guesswork and time spent searching for the correct parts; they even include a flywheel. The Brinn original transmission is a lightweight, direct drive tranny featuring the lowest rotating weight and moment of inertia available of any transmission on the market. Performance, durability, and smooth shifting are all trademarks of Brinn. Plus, with the same overall length and output splines as a Muncie or Borg-Warner transmission, installation is a snap. Your shop time will drop off, while your race car takes off! Brinn original transmission modules include all necessary fasteners but do not include your 1/4 in. motor plate. Take action and make your life easier in the process. Trust Brinn original transmission modules to deliver what you need. We'll see you in the winner's circle!
Not Yet Reviewed
$4,302.99
—
$4,754.99
XClutch Stage 4 clutch kits are performance upgrades that have been engineered to provide the ultimate in clutch performance. Utilizing the latest pressure plate design and friction material composition, XClutch upgrades offer the ideal balance between drivability and performance for different vehicle applications. The pivot point and diaphragm design are carefully analyzed to ensure positive pedal feel and increased clamping force. XClutch 10.5 in. range is designed primarily for use in high-power street vehicles that require modulation in the pedal but also high-torque capacity.
Not Yet Reviewed
$2,164.76
Tilton 52-Series UTGC driveline packages are engineered to not only save you time, but also deliver the performance to reach your car-building goals. Matched components work together efficiently and are designed to offer the most ground clearance—an additional 2.2 inches—over most OE bellhousings. And for fast acceleration and deceleration, the included flywheel and clutch combo offers the lowest inertia possible in a rear-mount starter unit. Tilton 52-Series UTGC driveline packages are designed to simplify your car-building process, as well as deliver maximum performance, reliability, and ease of installation. Tilton 52-Series UTGC driveline packages include: * Rigid aluminum bellhousing for maximum power and minimum wear * Clutch/flywheel assembly: race-proven OT-Series clutch and billet steel flywheel for balance, durability, and low inertia * Hydraulic release bearing: billet aluminum body and piston, proprietary low-friction coatings, high-temperature quad tensioner monoseal, and high-quality 38mm contact diameter bearing maximizes clutch modulation * Super Starter: rear mount severe-duty 3.0 hp starter
Not Yet Reviewed
$2,324.75
—
$3,349.00
Summit Bucks
Optimum-SR 10.4 in. twin-disc clutch/flywheel/release bearing kits continue the winning ways of a leader in driveline technology, Quarter Master. With lessons learned from racing, and with the data from extensive drivability testing, Optimum-SR clutches are available for street use. The se lighter-than-stock clutches feature a spring designed to require only a 10 percent increase in pedal effort over stock, with stock-type modulation control, and they are capable of handling 1400 hp and 1000 lbs.-ft. of torque. Features include: * Sprung hub, marcel-type discs with organic rag-type friction for smooth engagement * Vented floater plate and grooved friction surfaces provide better cooling * Aircraft-grade bolts and hardware * All-billet construction * Completely re-buildable * Can be used with OE hydraulic bearing systems or Quarter Master Tri-Lite II hydraulic release bearings
Not Yet Reviewed
$3,287.66
—
$4,814.91
Summit Racing™ Automatic Transmissions combine quality and economy to offer replacement transmissions in many styles and options. These units are remanufactured with all-new clutches, thrust washers, seals, bushings, and high-energy bands, along with other "failure prone" hard parts depending on unit. Other features include a rebuilt front pump, a valve body with shift for street and performance and high-quality seals and gaskets. You get all these impressive upgrades, along with reliable performance and extreme value. All transmissions are Dyno tested before they're shipped. Order the model recommended for your vehicle.
( 47 )
$2,024.99
BD Diesel Performance automatic transmissions are designed to transfer the power from high-torque modified diesel engines. They feature redesigned clutch packs with 50 percent more holding surface, steel 6-pin planetary gear carriers, and new lube ports added for high-load areas. Shift strategies and pressure circuits are also modified to handle the high-torque applications. BD Diesel transmissions are not rebuilt factory transmissions--they are custom-tailored to work with your modified truck.
( 1 )
$5,251.00
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
