Transmission Parts GM 4T45-E 4T40-E Valve Body Valve / Sleeve
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Symptoms:

  • Code 1811
  • 2nd Gear starts
  • Delayed Forward
  • High line pressure in Reverse
  • 1-2 Harsh
  • 2-3 Harsh
  • No 4th
  • Blown valve body gaskets

Cause:

The actuator feed valve limits pressure to the EPC and shift solenoids. Wear a the smallest diameter causes high pressure and oil loss at the larger diameters reduces line pressure.

Correction:

This highly wear-resistant sleeve allows reuse of the OEM valve and provides more valve contact for better hydraulic control.

Warning:

Required tool kit 33886-TL is no longer in production. Check with your distributor for availability.

4T40-E, 4T45-E

AFL Valve Sleeve Kit
Part No. 33886-01K


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The OE actuator feed limit (AFL) valve regulates the oil pressure routed to the pressure control solenoid, each of the shift valves, and to the 1-2 signal and 2-3 signal circuits. Constant oscillation of this valve causes bore wear, reducing the AFL oil pressure, which can cause solenoid and ratio codes, clutch/band failure and harsh shifts. The Sonnax sleeve kit, 33886-01K, re-establishes the correct clearance with the OE valve.

  • Sleeve is made from highly wear-resistant aluminum.
  • Sleeve provides significantly more valve support to prevent wear.
  • Kit allows re-use of the OE valve.
  • Sleeve re-establishes the hydraulic integrity of the AFL circuit by restoring the correct clearance with the OE valve.

Always replace the O-rings on the pressure control solenoid and AFL filter O-rings while servicing this unit.

  • Sleeve
  • Spring
  • 4T40-E, 4T45-E AFL Valve Sleeve Kit 33886-01K
  • 4T40-E, 4T45-E AFL Valve Sleeve Kit 33886-01K

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