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Friday, July 28 • 8:00am - 11:00am
Sonnax: Inside Torque Converter Clutches and Precision International: Real-World Fixes
"Sonnax: Inside Torque Converter Clutches" and "Precision International: Real-World Fixes" bring together two speakers in one session. Bob Warnke demonstrates how current torque converters are very efficient due to their slip strategy and lockup controls. Any wear, or variables in repair, can have a negative effect on this control. You will discuss converter designs and the components up-stream, that affect drivability. You will also discuss test methodology for these components.

Being a shop owner as well as a technical advisor for Precision International, John Parmenter sees the transmission problems shops deal with on a daily basis. This session will provide a detailed look into problems transmission techs are dealing with in shops today - and how to overcome them!

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avatar for John Parmenter

John Parmenter

Precision International
John's classes are globally in demand. He has taught technicians from Perth, Australia to Moscow in the soviet union, and everywhere in between. He owns and operates a busy transmission shop in New York where he is the lead rebuilder. His shop handles and services many OE dealer... Read More →
avatar for Bob Warnke

Bob Warnke

Employed by Sonnax since Feb 1997, Bob Warnke's activities include product development relative to automatic transmission controls in hydraulics and the torque converter clutch. This encompasses development of test programs, marketing information, the training and then the implementation of procedures into remanufacturing facilities. As a by-product of this... Read More →

avatar for ATSG


ATSG (Automatic Transmission Service Group) is a technical support service and leader in the Automatic Transmission Industry. Since our inception in 1985 by Robert Cherrnay, we have kept his vision to grow, change and revolutionize the industry by leaps and bounds. Our priority is to focus on how we can better serve the automatic transmission shop and total car care shop owner, their employees, technical professionals by providing unmatched superior technical support, continuous updated bulletins, membership enhancements, turning problems into solutions as well as saving our members time and money to help them get their customers in and out of the shop fully satisfied in a timely manner... Read More →
avatar for Sonnax


Founded in 1978, Sonnax is an award-winning industry leader in the cutting edge design, manufacture and distribution of the highest quality products to the automotive aftermarket, commercial vehicle industries, and industrial sectors utilizing drivetrain technology. We offer a wi... Read More →

Friday July 28, 2017 8:00am - 11:00am
McCormick Place - West Building 2301 S. King Drive • Chicago, Illinois 60616