Ford 6R140 transmissions may exhibit multiple line pressure and converter-related problems due to excess wear in the line pressure control bore. Wear at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Wear at the outboard spool robs converter feed pressure and lowers line pressure, resulting in soft shifts and burnt clutches.
Reconditioning the bore and installing Sonnax oversized line pressure control valve kit 126740-08K restores hydraulic integrity for proper line pressure control and improved shifting in all ranges.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
May 26, 2015
Topics: Diagnostics And Theory Transmission Report Newsletters Valve Body Reaming Transmission Ford 5R110W Transmission 6R140 TransmissionRead Now
November 24, 2015
Topics: Vacuum Testing Vacuum Test Guides Transmission Ford 6R140 TransmissionRead Now
September 30, 2005
Topics: Diagnostics And Theory TransmissionRead Now
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Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected. For accurate vacuum testing results, drop 1/8" dia. checkball in front of valve (bottom of bore) before testing. Ensure checkball is removed after testing!