Symptoms:

  • Code P0872
  • Code P1711
  • Pressure switch stuck on
  • Failsafe mode
  • 3rd Gear starts

Cause:

Deterioration of the E-shift bore causes valve sticking that leads to trouble codes and drivability concerns.

Correction:

Stop valve hang-up and restore normal operation by reconditioning the bore and installing Sonnax oversized E-shift valve kit.

1000/2000/2400

Oversized E-Shift Valve Kit
Part No. 37000-15K

Fits '00–'09 units only.


You need this if... View Instructions Find a Distributor

GM trucks equipped with Allison® 1000/2000/2400 transmissions often go into failsafe mode, with codes P1711 or P0872 set in computer memory. This can be caused by bore wear at the E-shift valve, which allows the valve to hang up in the bore. Reconditioning the bore and installing Sonnax oversized E-shift valve kit 37000-15K restores normal operation by renewing critical clearances to allow smooth valve movement, and the hardcoat anodized aluminum valve combats premature wear.

  • Spring
  • Valve
  • End Plug
  • 1000/2000/2400 Oversized E-Shift Valve Kit 37000-15K
  • 1000/2000/2400 Oversized E-Shift Valve Kit 37000-15K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

1000/2000/2400 Oversized E-Shift Valve Kit Vacuum Test Locations