Vehicles with '95-later 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 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.

Replaces worn checkball sleeve to correct loss of apply pressure
Components manufactured from high-strength, wear-resistant aluminum for added durability
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Motive Gear Differential Pinion Bearing Kit, Koyo, For JEEP WRANGLER 2018–2021, Kit

Motive Gear Differential Pinion Bearing Kit, Koyo, For JEEP WRANGLER 2018–2021, Kit

$269.47

RTS Differential Master Bearing Kit, Suit 9 Inch Ford, 3.250 LM104949/LM104911, Std Pinion Bearings, Kit

RTS Differential Master Bearing Kit, Suit 9 Inch Ford, 3.250 LM104949/LM104911, Std Pinion Bearings, Kit

$271.03

Motive Gear Differential Master Bearing Kit, Timken, For HUMMER H1 2002–2004, Kit

Motive Gear Differential Master Bearing Kit, Timken, For HUMMER H1 2002–2004, Kit

$230.69

TCI Torque Converter, StreetFighter, For Chevrolet, TH350/TH400, Each

TCI Torque Converter, StreetFighter, For Chevrolet, TH350/TH400, Each

$1,313.14

Motive Gear Differential Pinion Bearing Kit, Timken, For Ford F-150 2008, Kit

Motive Gear Differential Pinion Bearing Kit, Timken, For Ford F-150 2008, Kit

$357.45