722.6

Fits '99-earlier units with two valves in the control pressure regulator bore.

Symptoms:

• Delayed engagement
• 2-3 Flare
• 3-4 Flare
• 4-5 Flare

Cause:
The regulating pressure control valve spring breaks.

Correction:
Replace the OE spring with the more durable Sonnax regulating pressure control valve spring.

The Mercedes 722.6 transmission is susceptible to a variety of drivability complaints, such as a delayed engagement into Drive or Reverse. These units can also exhibit a flared 2-3, 3-4 and/or 4-5 shift accompanied by flared forced kickdown shifts. The most common cause of these complaints is a broken regulating pressure control valve spring. The spring usually breaks near the middle, allowing the two halves to screw into each other, changing its length. As the length of the broken spring changes, it affects line pressure, which can cause one or all of these complaints. Sonnax offers the Regulating Pressure Control Valve Spring for use with the regulating valve and in controlling line pressure.

• Bore requires no modifications
• Addresses many driveability complaints
• Can be installed with valve body still in vehicle

Note:
Will not fit later units with single valve lineup and 3.10" spring, body casting #R1402773801.

SONNAX Installation Instructions