Skip to content

Sonnax 22771A-07K Transmission Pressure Regulator Valve Kit (Oversized)

by Sonnax
SKU S12741POS-1
Original price $69.99 - Original price $69.99
Original price
$69.99 - $69.99
Current price $69.99
in stock, ready to be shipped

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Manufacturer Part Number: 22771A-07K

Other Part Number: S22741PAK

Brand: Sonnax

42RE, 42RH, 44RE, 44RH, 46RE, 46RH, 47RE, 47RH, A727, A904

Oversized Lube Regulated Pressure Regulator Valve Kit
Part No. 22771A-07K

Original valve must match '78-later design

  • F-22771A-TL7
  • VB-FIX
In Chrysler A727, A904, 42-46-47RH/RE units (RWD '78-later with TCC), the cooler/converter charge circuit is not opened until the pressure regulator valve moves far enough to flow oil. The industry fix of drilling a small orifice between line pressure and cooler circuit ensures flow to the converter/lube circuit, but the hole also increases the converter drain back problem because ATF can drain when the engine is turned off. Sonnax offers a standard-size pressure regulator valve, 22771A-02K, that resolves these problems, but this valve will not repair severely worn valve bodies. In such cases, Sonnax recommends installing oversized pressure regulator valve kit 22771A-07K for increased stability and improved lube regulation.
  • Oversized valve is designed with an internal check valve that allows oil to flow into the converter charge circuit as soon as the vehicle is started
  • Internal valve shuts down once line pressure reaches normal levels
  • With engine off, the internal check valve prevents fluid from draining out through the orifice, reducing converter drainback

Also available, Sonnax line pressure plug and sleeve kit 22229-01K can be used to replace all OE sizes and has a reduced plug to increase reverse boost.

  • Valve
  • Plug
  • Spring

Use this text to share information about your product.

Blog posts