Conventional Powerglide servos are not well-supported. At high apply pressures or with a worn servo pin bore, the servo piston is side-loaded in the case, causing friction and binding of the piston. The unique Sonnax supported servo pin and cover kit 28821-19K eliminates friction caused by side-loading and ensures the servo piston will apply and release without binding.
April 27, 2016
Topics: Diagnostics And Theory Transmission GM Powerglide TransmissionRead Now
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