July 28, 2023
GM 6L90 (Captive Clutch) torque converters are a nuisance to rebuild. In these converters, the piston is held onto the cover by leaf springs and rivets that are difficult to remove to get to the clutch plate that is captive between the piston and the cover. GM 6L90 diesel-powered applications use a captive clutch torque converter. Sonnax offers JMDZ diesel performance converter kit GM-RK-22 that does not use a captive clutch plate design thus simplifying rebuilding.
GM 6L90 diesel-powered applications often tow heavy loads which can quickly push the stock two-disc converter clutch past its capacity. Sonnax GM-RK-22 employs a forged 6-pad cover, forged piston and three woven carbon friction elements. Builders now have a dampered 300mm multi-plate option that delivers significantly increased clutch capacity and durability. By re-using the OE damper with the Sonnax clutch plates (bonded with OE woven carbon friction material), GM-RK-22 ensures optimal TCC apply and release characteristics, as well as slip rates that match OE continuous slip calibrations. Drivability is excellent. This easy-to-build and cost-effective kit includes clear, concise instructions.
Enhanced design features include:
This converter kit requires a salvaged inner damper plate from a GM 6L90 JMBX torque converter.
The converter sticker codes found on 6L80/90 full size converters are not always consistent. In particular, the JMDZ code can be found on both gas and diesel types of these converters. Be sure to check the bolt circle diameter and overall converter height to verify the Sonnax kit is designed for your application.
Designed from the ground up to outperform OE and other aftermarket components, Sonnax has you covered with a full line of performance converter kits for gas and diesel vehicles. Offering the widest variety of options in the aftermarket, these innovative kits deliver customized performance and value.