Transmission Parts Allison 1000/2000/2400 Valve Body Spring

Symptoms:

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

Cause:

Wear ridges or flashing in bore coupled with low OE return spring rate allows E-shift valve to stick.

Correction:

Prevent valve sticking and restore normal operation by reconditioning the bore and installing Sonnax E-shift valve spring.

1000/2000/2400

E-Shift Valve Spring
Part No. 37000-02

Fits '00-'09 units only.

Requires:

37000-02BST (Recommended)

View Instructions Find a Distributor

Allison 1000/2000/2400 units commonly exhibit 3rd Gear starts and trouble codes related to a sticking E-shift valve. The low return rate of the OE spring combined with flashing or wear ridges forming in bore over time allow the valve to hang up, resulting in these concerns. Crack down on sticking valve action by reconditioning the bore and installing stronger Sonnax E-shift valve spring 37000-02.

Bore sizing tool 37000-02BST improves bore finish and removes flashing and ridges for smoother valve operation
Stronger spring helps prevent valve binding

Valve Body Layout

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.