Sonnax releases Smart-Tech drum module for TH400 racing applications - Transmission Digest

Sonnax releases Smart-Tech drum module for TH400 racing applications

At the recent PRI show in Indianapolis, Sonnax announced the release of its Smart-Tech drum module for racing GM TH400 transmissions.

According to Sonnax, this drum module is designed to correct a specific flaw of the TH400: the fact that the direct drum counter rotates, spinning backwards in first 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, the company says.

Sonnax says that compared to aluminum direct drums, the Smart-Tech drum module (part no. 34555-01K) reduces the weight of the counter-rotating components by 3.3 lbs. Additionally, because the weight of the Sonnax counter-rotating parts is closer to the centerline, there is a 68% 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.

Additional details on the drum module include:

  • Complete kit 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% 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.

You May Also Like

Alto introduces Ford Mustang cartridge filter kit

Alto has introduced a cartridge filter kit for Ford TR-9070 DCT seven-speed models, fitting the Mustang GT500 with 5.0L and 5.2L engines. The filter kit (part no. 239940) comes with an o-ring and five bolts.

Alto has introduced a cartridge filter kit for Ford TR-9070 DCT seven-speed models, fitting the Mustang GT500 with 5.0L and 5.2L engines. The filter kit (part no. 239940) comes with an o-ring and five bolts.

TransTec updates 6F35 Gen 1 overhaul kits

TransTec announced that its Ford 6F35 Gen 1 overhaul kits have been updated to include a new Duraprene gasket and aluminum spacer (pictured above). This new gasket and spacer are used in place of the silicone sealant the OEM uses. Related Articles – Alto introduces molded piston kit for GM 9T50, 9T65 – Sonnax introduces

Alto introduces molded piston kit for GM 9T50, 9T65

Alto has introduced a three-piece molded piston kit for GM Hydra-Matic 9T50 and 9T65 nine-speed transmissions. The kit (part no. 232670) covers model years 2017 and on. It contains three pistons: the 6-7-8-9 balance piston, the 5-7 reverse apply piston, and the 3-8 apply piston. Related Articles – Ingersoll Rand introduces new air hammer for

Sonnax introduces PR boost valve and o-ringed end plug kits for GM 9T series

Sonnax has introduced drop-in PR boost valve and o-ringed end plug kits for GM 9T45/50/60/65 transmissions. Related Articles – Sonnax introduces Smart-Tech drum module for racing applications – TransTec introduces Power Steering Gear Seal Kit for Jeep Wrangler – Sonnax highlights oversized low overrun valve kit Pressure regulator boost valve kit #184740-02K restores line pressure

TransTec updates E40D/4100 overhaul kits

TransTec announced that all of its Ford E40D/4100 overhaul kits (model years 1996 and up) will contain Direct and Intermediate Feed Tube Seals. Related Articles – Raybestos adds new clutches for GM 8L45 – Bosch updates ADS, ADS X scan tools – Repairify introduces asTech All-in-One, asTech Mini diagnostics devices The company notes that due

Other Posts

12 transmission jack safety tips

A transmission jack is a must to remove, install or move transmissions, transfer cases and transaxles in a shop. These jacks save backs and time, but they are powerful multitask lifting systems so they must be operated correctly, with safety being the first priority. Related Articles – Going the extra mile: Price’s Garage builds on

techtip-1400
How to fix GM 8L45/8L90 no-move and no-pressure conditions

By now you may have heard of, or even experienced, a GM 8L45 or 8L90 transmission with a no-move or no-pressure condition. Conditions of no movement or no pressure after repair have plagued this unit since its inception. Here’s what you can do about them. Related Articles – Ford harsh downshifts: 6R75 2-1, 10R60 7-6

Tasc-Force-December-Figure-1-Pressure-Regulator-Valve-Assembly-Correct-1400
Six drag race drivers win championships with ProTorque converters

ProTorque touts six drivers who used ProTorque converters to win world championship titles during the 2022 drag racing season. Related Articles – BorgWarner’s Tom Hardies passes – Complete TD’s shop survey for a chance to win a gift card – Schaeffler releases technical and service bulletins for LuK products Those champions include:

ProTorque-Champions-600
Sonnax highlights main pressure regulator valve kit

Sonnax highlights its main pressure regulator valve kit #105740-12K, which the company says can eliminate low line pressure, delayed engagement, poor shift quality, burnt clutches and various shift concerns in GM 10L80 (Gen. 1) and Ford 10R80/10R140 transmissions. Related Articles – GFX introduces variety of new products: Oil pumps, friction plates, bearings and more –

Sonnax-105740-12K-600