Tool Required VB-FIX Required

Printpartsummary
Symptoms:
  • 1-2 Bind-up
  • 3-4 Flare
  • 4-5 Concerns
  • Clutch distress
Cause:

Valve bore wear results in loss of apply oil, sluggish valve movement and sticking valves causing shift complaints and clutch distress.

Correction:

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.

Tool Required VB-FIX Required

5L40-E, 5L50-E

Oversized 3-4, 4-5 & Safety Mode Valve Kit

Part No.

55211-14K

Oversized 3-4, 4-5 & Safety Mode Valve Kit
  • 55211-14k_combo1

  • 55211-14k_combo2

  • 55211-14k_combo3

  • Oversized 3-4, 4-5 & Safety Mode Valve Kit

Small_55211-14k_combo1 Small_55211-14k_combo2 Small_55211-14k_combo3 Small_55211-14k

5L40-E, 5L50-E

Oversized 3-4, 4-5 & Safety Mode Valve Kit

Part No. 55211-14K

  • Shift Valve
  • Control Valve
  • Spring

Complaint:

  • 1-2 Bind-up
  • 3-4 Flare
  • 4-5 Concerns
  • Clutch distress

Cause:

Valve bore wear results in loss of apply oil, sluggish valve movement and sticking valves causing shift complaints and clutch distress.


Correction:

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.

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
NOTE:

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.

Required Tools

You need this if...

A vacuum test at ports indicated (Figure 1) fails to hold indicated minimum vacuum amount.

  • Test Locations

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Valve Body Layouts

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Valve Body Layout GM 5L40-E, 5L50-E

Related Tech Articles

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GM 5L40-E, 5L50-E Vacuum Test Guide

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