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Valve Body
(View Valve Body Layout Diagram)
Converter Feed Limit Valve Kit 154740-19K
O-Ringed End Plug Kit 154740-17K
Oversized Converter Feed Limit Valve Kit 154740-22K
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Helps cure:
- Excess converter pressure
- High TCC slip RPM
- Code P0218
- Code P0741
- Overheated converter
- Inadequate lubrication
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Tooling:
- F-154740-TL22
- VB-FIX
Oversized Signal Accumulator Piston Kit 154740-01K
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Helps cure:
- Poor shift quality
- Low line pressure
- No converter apply
- Hydraulic-related converter codes
- Burnt clutches
- Soft shifts
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Tooling:
- 154740-TL
Pressure Regulator & Shuttle Valve Kit 154740-02K
S1/S5 Clutch Control Valve Kit 154740-13K
S2/S3/S4/TCC Clutch Control Valve Kit 154740-11K
Shift Zip Kit® 8L45-8L90-SHIFT-ZIP
Shuttle Valve Kit 154740-09K
Signal Accumulator Piston Kit 154740-06K
TCC Zip Kit® 8L45-8L90-TCC-ZIP
Tech Resources
April 06, 2022
Diagnosing the Infamous GM 8L45, 8L90 3-4 Neutral: Check Your Solenoid Wiring Harness Assembly
Jim Mobley
October 01, 2021
GM 8L45, 8L90 Valve Body Layout
April 21, 2021
GM 8L45, 8L90 Vacuum Test Guide
April 21, 2021
Diagnosing 8L45 & 8L90 Shift Complaints: Always Check the VFS Solenoid Circuits
Maura Stafford