4L80E, 4L85E Third / Reverse Checkball Sleeve Kit 34200-47K, 1995 On

$ 17.99

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4L80E, 4L85E Third / Reverse Checkball Sleeve Kit  34200-47K, 1995 On

Vehicles with ’95-later GM 4L80E and 4L85E 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 the checkball becomes compromised and results in loss of apply pressure to direct clutches. Consequences of this pressure loss are slipping or no 3rd and 4th Gears, burnt direct clutches, and ratio codes.

Installing Sonnax 3rd and Reverse checkball sleeve kit 34200-47K, restores the hydraulic integrity of this circuit to reestablish normal shift operation and performance. Kit components are manufactured from high-strength, wear-resistant aluminum for added durability.

  • 3rd Checkball Sleeve
  • Reverse Checkball Sleeve
  • O-Rings (2) 1 Extra

Where to Buy:

PATC 1-888-201-2066


  • 3rd Slip
  • 4th Slip
  • Gear ratio codes
  • Direct clutch burned
  • Reverse slip


Excess wear in 3rd and Reverse checkball sleeves allows valuable oil loss or cross leakage.


Restore hydraulic control and prevent premature wear by installing upgraded material Sonnax 3rd and Reverse checkball sleeves.

Additional information

Weight 1 lbs
Dimensions 6 × 6 × 6 in