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.

More From This Category

Motive Gear Differential Master Bearing Kit, Koyo, Suits Ford 9 Inch Diff, 2.891" x 1.781" LM102910/LM102949, Std Pinion Support

Motive Gear Differential Master Bearing Kit, Koyo, Suits Ford 9 Inch Diff, 2.891" x 1.781" LM102910/LM102949, Std Pinion Support

$209.40

TCI Servo, Billet Aluminum, 2nd Gear, For Ford, C-4, Kit

TCI Servo, Billet Aluminum, 2nd Gear, For Ford, C-4, Kit

$384.47

MANLEY Connecting Rod Pin Bushing, Bronze, .910 in. OD, .856 in. ID, .950 in. Length, Each

MANLEY Connecting Rod Pin Bushing, Bronze, .910 in. OD, .856 in. ID, .950 in. Length, Each

$22.80

Sonnax Vacuum Test Plate Kit Seal, GM, 4L80E, 4L85E, Each

Sonnax Vacuum Test Plate Kit Seal, GM, 4L80E, 4L85E, Each

$213.70