Valve Body Parts

8L90 8L45 Shuttle Valve Kit | Sonnax

Vehicles with GM 8L45 and 8L90 transmissions may exhibit high line pressure that results in harsh shifts, loss of cooler and lube flow and overheating of the transmission and converter. These problems may be caused by continuous oscillation of the...

8L90 8L45 S4 Clutch Control Valve Kit (2019-UP) Sonnax

Fits 2019-UP Models Only! Pressure loss, a burnt 2-3-4-6-8 (S4) clutch and poor shift quality are common complaints with the GM 8L45 and 8L90 transmissions. These symptoms can be caused by a worn S4 clutch control valve and bore that allows valuable...

8L90 8L45 Pressure Regulator & Shuttle Valve Kit | Sonnax

Vehicles with a GM 8L45 or 8L90 transmission may exhibit high or low line pressure that results in harsh/soft shifts, burnt clutches, loss of cooler and lube flow and overheating of the transmission and converter. These problems may be caused by wear of...

8L90 8L45 Pressure Regulator & O-Ringed Shuttle Valve Kit | Sonnax

Vehicles with GM 8L45 or 8L90 transmissions may exhibit high or low line pressure that results in harsh shifts, burnt clutches, loss of cooler and lube flow and overheating of the transmission and converter. These problems may be caused by wear of the...

8L90 8L45 Oversized Signal Accumulator Piston Kit (2019-UP) Sonnax

2019-UP UNITS ONLY! Tooling Required: 15740-TL GM 8L45 and 8L90 transmissions often suffer burnt clutches, shift concerns, low line pressure and/or converter apply complaints due to excess wear in the signal accumulator piston bores in the control...

8L90 8L45 Oversized S4 Clutch Control Valve Kit (2019-UP) Sonnax

Fits 2019-later units only! Tooling Required: F-154740-TL26, VB-FIX Pressure loss, a burnt 2-3-4-6-8 (S4) clutch and poor shift quality are common complaints with GM 8L45 and 8L90 transmissions. These symptoms can be caused by a worn S4 clutch control...

8L90 8L45 Oversized Converter Feed Limit Valve Kit | Sonnax

Required Tooling: F-154740-TL22, 15470-TL22, VB-FIX GM 8L45 and 8L90 transmissions may have TCC apply and release problems. Bore wear or a stuck converter feed limit valve can result in converter overheat, incorrect TCC apply or release, inadequate lube...

8L90 8L45 O-Ringed Shuttle Valve Kit | Sonnax

Vehicles with a GM 8L45 or 8L90 transmission may exhibit high line pressure that results in harsh shifts, loss of cooler and lube flow and overheating of the transmission and converter. These problems may be caused by continuous oscillation of the...

8L90 8L45 O-Ringed End Plug Kit | Sonnax

OE end plugs are designed to prevent critical pressure loss by capping the bore, while also functioning as a spring or valve stop. Repetitive spring motion, valve impact and fluid pressure variations cause wear between the end plug and bore mating...

8L90 8L45 Converter Feed Limit Valve Kit | Sonnax

Recommended Tooling: 154740-TL22 GM 8L45 and 8L90 units may have TCC apply and release problems. Bore wear or a stuck converter feed limit valve can result in converter overheat, incorrect TCC apply or release, inadequate lube and cooling and converter...

8L90 8L45 Pressure Relief Ball Valve Spring (Pack of 5) Sonnax

The GM 8L45 and 8L90 transmissions are having a recurring problem where the typical ball and spring seat is not opening and relieving pressure effectively. The OE spring design needs to see 400+ psi in order to open and relieve line pressure. As a result...

8L90 TCC Regulator Valve

8L90-TCC-REG 8L90 TCC Valve Made in Oklahoma by Central Valve Bodies  HARD ANODIZED FINISH FOR WEAR RESISTANCE  NEW GENTLY OVER-SIZED VALVE SEALS EXISTING BORE

8L90 8L45 Signal Accumulator Valve (Set of 7)

8L90-SAV-7 8L45 & 8L90 Signal accumulator valves - set of 7 Drop in update for 8L45 and 8L90 valve bodies No reaming required Hard anodized Made in Oklahoma by Central Valve Bodies

8L90 8L45 Pressure Regulator Valve

8L90-PR 8L45 & 8L90 Pressure regulator valve Drop in update for 8L45 and 8L90 valve bodies No reaming required Hard anodized Made in Oklahoma by Central Valve Bodies

8L90 8L45 End Plug (Set of 3)

8L90-PLG-3 8L45 & 8L90 End plugs - set of 3 Drop in update for 8L45 and 8L90 valve bodies No reaming required Made in Oklahoma by Central Valve Bodies

8L90 8L45 Converter Feed Limit Valve

8L90-CFL 8L45 8L90 Converter feed limit valve Drop in update for 8L45 and 8L90 valve bodies No reaming required Hard anodized Made in Oklahoma by Central Valve Bodies

8L90 AFL Valve Actuator Feed Limit

8L90-AFL 8L90 Actuator Feed Limit Valve  Made in Oklahoma by Central Valve Bodies  HARD ANODIZED FINISH FOR WEAR RESISTANCE  NEW GENTLY OVER-SIZED VALVE SEALS EXISTING BORE