Checkball sleeve 4L80E

Checkball sleeve 4L80E Package Quantity: 4 Vehicles with GM 4L80-E and 4L85-E transmissions commonly exhibit wear in the Reverse checkball sleeve located in the 3-4 shift valve bore. This issue is caused by normal movement of the checkball within the sleeve over time. As wear progresses, sealing function of checkball becomes compromised and results in loss of apply pressure to direct clutches. Symptoms: • 3rd Slip • 4th Slip • Direct clutch burned • Gear ratio codes • No Reverse • Reverse slip Cause: Excess wear in Reverse checkball sleeve prevents proper application of direct clutches. Correction: Restore hydraulic control and prevent premature wear by installing upgraded material Sonnax Reverse checkball sleeve.