Vehicles with GM 6L45, 6L50, 6L80, 6L90 series transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt clutches. These problems may be caused by continuous oscillation of the boost valve within the boost sleeve, creating excessive wear and a path for EPC fluid pressure to leak to exhaust. Sonnax boost valve kit 104520-01K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control. The sleeve also has a slightly larger EPC feed orifice to provide quicker throttle response.
• Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent wear
• Larger feed orifice provides quicker throttle response
• Restores proper line rise
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.
August 21, 2013
Topics: Vacuum Testing Vacuum Test Guides Transmission GM 6L90 Transmission 6L80 Transmission 6L50 Transmission 6L45 TransmissionRead Now
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A vacuum test at the port indicated fails to hold at least 18 in-Hg.