Sonnax 22771A-13 Oversized 4-Spool Switch Valve for Chrysler Transmissions

The Sonnax 22771A-13 is an oversized 4-spool switch valve designed to repair switch valve bores with excessive wear in Chrysler automatic transmissions. This valve fits 1993 and later transmissions with 4-spool valve design, including popular models like the 42RH/RE, 46RH/RE, 47RH/RE, 48RE, A727, and A904.

Problems This Part Solves:

• Bore wear toward the spring end reduces converter release oil, affecting converter charge at idle and causing engine stumble, loss of lube oil flow, overheating and poor performance
• Bore wear at the inboard end creates poor TCC apply or a reduction in line pressure boost
• Lockup shudder, overheated converter, low cooler flow, and soft TCC apply

Key Features:

• Valve controls TCC release oil venting during apply for a firmer apply and no shudder
• Stem length, spool spacing and exhaust timing have been improved to ensure quicker stroke and less valve bounce
• Improves the timing and flow to the apply and release circuits
• Salvages worn bores
• Oversized design accommodates excessively worn valve body bores

Installation Note: If the bore is not excessively worn, install Sonnax standard OE-size switch valve kit 22771A-01. The oversized 22771A-13 requires the use of Sonnax reaming tool kit 22771A-TL13 for proper bore preparation.