Interchange Part Number: 34910-03K
Surface Finish: NEW
Manufacturer Part Number: S34507PK, 34910-03K
Placement on Vehicle: Front
Brand: OEM Replacement
Hello, If you need assistance finding a part please supply the VIN number of your NORTH AMERICAN vehicle AND the part number you are looking for.| Feedback | From Buyer | Date/time | |
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Great Deal, Fast Shipping, A+ | j********8 ( 434  )
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2016-10-22 14:43:59 |
- Valve
- PTFE Seals (2)
- End Plug
- O-Ring
High-mileage vehicles with a THM 400 often experience poor line pressure control due to a worn pressure regulator bore. This will result in high cooler pressure and converter, crankshaft, and/or friction element failure. This bore wear can be verified by testing line pressure and Wet Air Testing the pump. This hardened steel valve continuously oscillates within the cast-iron pump bore, resulting in wear. Balance line pressure is then allowed to leak past the valve and exhaust to the sump. This prevents the pressure regulator valve from moving completely to the lower line pressure position. Sonnax offers a pressure regulator valve kit 34910-03K that eliminates these problems.
- The pressure regulator valve has been modified to incorporate a solid PTFE seal ring that properly separates the balance line circuit from the pump suction, preventing cross leakage.
- Kit also includes an o-ringed end plug to ensure proper back pressure to the pressure regulator valve.
- This kit eliminates the need to replace the pump casting to ensure pressure control.
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