Clutch Archives - Transmission Digest
Raybestos adds new Toyota UA80 / UB80 converter clutch plates

Raybestos has introduced a series of Toyota UA80 and UB80 converter clutch plates. They include:

Schaeffler offers new LuK clutch kits

Schaeffler Group USA has announced the release of new LuK brand clutch kits. New LuK products include nine different clutch kits, including traditional LuK RepSets and RepSet DMFs. The newly released clutch kits provide coverage to many common vehicle applications, including various Toyota, BMW and Volkswagen models, accounting for 4.3 million vehicles in operation, the company said.

Schaeffler
Ford 8F24 mechanical diode failure

Mechanical diode failure in automatic transmissions is not uncommon. As far back as the AODE/4R70 shops have seen this type of failure. In April 2022 an article was published in Transmission Digest called, “The ins and outs of the Hydraulic Selectable One-Way Clutch (SOWC).” This article provided photos of the type of damage this style

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American Powertrain introduces ProTwin disc clutch for GM, Ford and Mopar

American Powertrain announced that it now offers a new ProTwin twin disc clutch kit for GM, Ford and Mopar performance applications. The kit comes with a billet steel flywheel, pressure plate, two drive discs, floater, flywheel crank bolts, pilot bearing and alignment tool. Each clutch kit comes fully balanced and features 1100 ft./lbs. of torque

Sonnax introduces Smart-Tech clutch kit for GM 4L series

Sonnax has introduced a new Smart-Tech clutch kit for optimizing clutch capacity and guarding against clutch burnup in GM 4L60, 4L60-E, 4L65-E and 4L70-E transmissions. This kit (part no. 77734-01K) includes eight .067-in. BorgWarner high-energy frictions and seven .095-in. Lindered steels recommended for use with Sonnax Smart-Tech input housings.

Sonnax introduces oversized low reverse/overdrive clutch regulator valve kit

Sonnax has introduced a new oversized low reverse/overdrive (4-5-6) clutch regulator valve kit (part no. 144740-43K) for Ford 6F35 transmissions, generations one, two and three. Sonnax says the kit can help restore the correct valve/bore clearances and clutch control in these transmissions. The kit includes a new spring that matches OE calibration, the company notes.

Sonnax introduces heavy-duty ‘A’ clutch backing plate

Sonnax has introduced a new heavy duty “A” clutch backing plate (part no. 35577-45) for Chrysler 845RE and 850RE, and ZF 8HP45, 8HP50 and 8HP51 transmissions. Sonnax says that this plate can eliminate the flexing/bowing of the clutch pack that leads to comebacks in these transmissions, and recommends installing them in units that have not

Raybestos offers new 10-speed performance GPZ Torqkits

Raybestos announced that it is offering new Clutch Torqkits for Ford 10-speed transmissions. There are three part numbers for the D (pictured above), E, and F Clutch Torqkit, respectively. They are drop-in replacements, and Raybestos touts the following features: D Clutch Torqkit E Clutch Torqkit F Clutch Torqkit

Manual clutch repair and diagnostics

Manual gearboxes are relatively trouble-free and long-lived, provided that they are not abused too severely. The clutch, however, is a wear component. With every shift, the clutch must be disengaged and engaged. Stop-and-go driving in heavy traffic is especially hard on a clutch because the driver is always riding the clutch pedal. After millions of

Manual-Transmission
6T40 delayed engagements after overhaul

The problem lies in the compensator piston that a generation two clutch housing uses compared to the generation one housing.

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Clutch Industries launches Clutch System in the U.S.

Australian manufacturer Clutch Industries announced that it is launching two clutch system products for the first time in the United States under the UniClutch brand. UniClutch (above left) and UniClutch Sport (above right) will be the first iterations of this system to launch in the U.S. The company says that UniClutch’s dual core technology significantly boosts torque

Sonnax highlights intermediate clutch backing plates for GM transmissions

Sonnax highlights its heavy-duty intermediate clutch backing plates for GM 4L80-E, 4L85-E and TH400 transmissions. Both backing plates are compatible with OE and aftermarket cases, the company says. Plates available include:

Sonnax-34144HD-01-600