Sonnax Allison 1000/2000/2400 Transmission

Remanufactured Valve Body

1000/2000/2400 Remanufactured Valve Body AL1002

’06–’09

1000/2000/2400 Remanufactured Valve Body AL1000

’00–’03

1000/2000/2400 Remanufactured Valve Body AL1001

’04–’05

Pump

C-1 Valve & Seal Kit 37000-05K

Fits February '04-earlier pumps. Does not fit No. 29541135 or later pump stators.

Helps cure:

C1 Clutch hub wear
Lack of C1 clutch control
Harsh Forward
Delayed bump on Forward

Lube Regulator & Converter Relief Spring Kit 37000-01K

Fits '03-earlier, 6 solenoid units.

Helps cure:

Overheating
Broken spring
Delayed engagement

Valve Body (View Valve Body Layout Diagram)

E-Shift Valve Spring 37000-02

Fits '00-'09 units only.

Helps cure:

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

Exhaust Backfill Valve Kit 37000-17K

Fits '00–'15 units.

Helps cure:

Flare shifts
Long shifts
Delayed shifts

F-Trim Valve End Sleeve 37000-03

Fits '00-'05 units only.

Helps cure:

Overheating
Code P0741
TCC surge

Manual Valve Selector Pin 37000-29K

Fits '00–'15 units only.

Helps cure:

Delayed Drive
Low line pressure
1-2, 2-3, 4-5 Flares

Oversized Control Main Relief Valve 37000-19

Fits ’00–’15 units only.

Helps cure:

Shift concerns
Loss of shift solenoid control pressure

Tooling:

F-37000-TL19
VB-FIX

Oversized E-Shift Valve Kit 37000-15K

Fits '00–'09 units only.

Helps cure:

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

Tooling:

F-37000-TL15
VB-FIX

Oversized F-Trim Valve Kit 37000-30K

Fits '00–'05 units only. Fits '00–'05 units only.

Helps cure:

Overheated transmission
Code P0741
RPM surge
TCC apply & release concerns

Tooling:

F-37000-TL30
VB-FIX

Oversized Gain Valve Kit 37000-24K

Fits '00–'09 units only. Fits '00–'09 units only.

Helps cure:

Shift concerns associated with circuit pressure loss

Tooling:

F-37000-TL24
VB-FIX

Oversized Manual Valve Kit 37000-28K

Fits '00–'15 units only.

Helps cure:

Low line pressure
Delayed Drive
Delayed Reverse

Tooling:

F-37000-TL28
VB-FIX

Trim Valve & Spring Kit 37000-12K

Fits '00-'09 units only. The F-trim spring is applicable to '00-'05 valve body casting only. 2002 & Later

Helps cure:

Premature clutch wear
Inability to alter clutch apply pressure curve

Tooling:

37000-TL12

Vacuum Test Plate Kit 37000-VTP

Fits '00–'15 units only.

Tooling:

VACTEST-01K

Vacuum Test Plate Kit Seal 37000-VTP-SS

Tooling:

37000-VTP
VACTEST-01K

Vacuum Test Plate Kit Seal 37000-VTP-MS

Tooling:

37000-VTP
VACTEST-01K

Other

Bore Sizing Tool 37000-02BST

Tool Kit 37000-TL12

Tool Kit F-37000-TL24

Fits '00–'09 units only.

Tooling:

VB-FIX

Tool Kit F-37000-TL15

Tooling:

VB-FIX

Tool Kit F-37000-TL19

Tooling:

VB-FIX

Tech Resources

FEATURED

August 01, 2019

Vacuum Test Guide

Allison 1000/2000/2400, '00–'15 Vacuum Test Guide

February 08, 2017

Identification Guide

Identifying Allison 1000/2000/2400 Valve Bodies

July 01, 2020

Identification Guide

Always Identify These Valve Bodies BEFORE You Start a Transmission Rebuild

Andrew Jessiman

January 05, 2023

Identification Guide

How to Identify Allison® LCT 1000 Input Shafts

July 08, 2019

Valve Body Layout

GM Allison® 1000/2000/2400 Valve Body Layout

October 13, 2022

How to Get Started with OE ECU Reprogramming

Jim Mobley

January 01, 2013

1000/2000/2400 Solenoid Identification

Valve Body Xpress

May 16, 2006

SonnaFlow® Chart: Allison 1000 (Normal)

May 16, 2006

SonnaFlow® Chart: Allison 1000 (Normal)

May 16, 2006