Tool Required VB-FIX Required
- 2-3 Bump
- 2-3 Flare
- 2-3 Harsh
Wear at the overlap valve bore prevents proper exhaust of the disengaging clutch pressure, altering the precise timing required in the clutch-to-clutch shift transition.
The improved Sonnax overlap valve kit restores hydraulic sealing integrity and valve timing when installed in a refurbished bore.
Oversized 2-3 Overlap Valve Kit
- Plunger Valve
- Plunger Sleeve
- Overlap Valve
The 722.6 transmission uses clutch-to-clutch transitioning during shifts, so timing is very critical to prevent shift complaints like flares or bind-ups. The overlap valves, controlled by EPC (modulated pressure) and shift valve pressure, are used to gradually reduce the pressure to the disengaging clutch. The replacement spring and valve ratios maintain OE shift pressures for proper timing and function.
- The oversized hard-coat anodized valve has slightly longer critical spool diameters and optimized annular groove placement for better hydraulic sealing and to prevent future bore wear.
- The wear-resistant plunger sleeve has an added O-ring to provide additional positive sealing in the bore
You need this if...
A vacuum test at either port indicated fails to hold 18" of vacuum or higher, or if visual wear is detected at the inboard overlap valve bores.
Click here to view PDF if instructions do not appear below.
Valve Body Layouts
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