March 09, 2015
6L80 Series Pressure Regulator Valve Repairs: Pump Drilling Explained
Presented by Sonnax
The best way to address GM 6L45, 6L50, 6L80, 6L90 pressure regulator valve problems is by replacing a wear-prone OE valve with an improved Sonnax drop-in Zip Valve™ or oversized part. Installation does require drilling a small hole in the pump, though, to prevent excessive line pressure. Learn more about why drilling is necessary and watch the simple, step-by-step process in this quick video.
Featured parts:
- Pressure Regulator Valve 104520-14K
- Zip Kit® 6L45-6L90-ZIP
- Oversized Pressure Regulator & Boost Valve Kit 104520-07K
Learn More
March 09, 2021
Why Do I Drill the Pump? Preventing Excess 6L80 Series Line Pressure with a Drop-In Sonnax PR Valve
Andrew Jessiman
March 15, 2022
6L80 Series Pump Drilling Demo with Small Drill Bit Vise
Jim Mobley
Related Units
Related Parts
Required
Recommended
6L45, 6L50, 6L80, 6L90
Oversized Pressure Regulator & Boost Valve Kit 104520-07K
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Helps cure:
- Erratic line pressure
- High line pressure
- Low line pressure
- Clutch slippage
- Harsh shifts
- Low cooler flow
- Burnt clutches
- No cooler flow
- Overheated transmission
- Converter concerns
While Sonnax makes every effort to ensure the accuracy of technical articles at time of publication, we assume no liability for inaccuracies or for information which may become outdated or obsolete over time.