Tool Required VB-FIX Required
- 1-2 Bind-up
- 3-4 Flare
- 4-5 Concerns
- Clutch distress
Valve bore wear results in loss of apply oil, sluggish valve movement and sticking valves causing shift complaints and clutch distress.
Install the Sonnax oversized valve kit that fits in any of the three locations (3-4 and 4-5 shift valve, safety mode valve) after refurbishing the bore to eliminate bore wear and sticking valves.
Oversized 3-4, 4-5 & Safety Mode Valve Kit
- Shift Valve
- Control Valve
A stuck or worn safety mode valve in the 5L40-E, 5L50-E can result in the L/R clutch staying applied on a 1-2 upshift, causing a 1-2 bind-up condition. Wear at the 3-4 or 4-5 shift control valves allows signal and apply oil pressure to exhaust, preventing proper valve movement that causes flares, shift complaints and clutch distress. Sonnax has developed an oversized valve and control valve kit that, when installed in a refurbished bore, restores the necessary hydraulic clearances required for proper valve function. This kit 55211-14K can be used in the 3-4 and 4-5 shift valve bores as well as the safety mode valve location.
- Oversized valve kit allows elimination of bore wear
- Hard-coat anodized aluminum valves with annular grooving prevent future wear
- One valve kit can be used in any of three OE locations
This kit can be used in any of three locations. If using in the safety mode valve location, the control (small) valve is not used.
You need this if...
A vacuum test at ports indicated (Figure 1) fails to hold indicated minimum vacuum amount.
Click here to view PDF if instructions do not appear below.
Valve Body Layouts
Related Tech Articles