How to Solve Allison 3000 & 4000 Gen5 P0731 Incorrect 2nd Gear Ratio?

Here is the instruction show you guide on how to repair P0731 incorrect 2^nd gear ration error for Allison 3000 & 4000 Gen5.

Related Contents:

2025 2019 Allison DOC Transmission Diagnostic Software Free Download

NEXIQ USB Link 3

 

 

DIAGNOSTIC RESPONSE:

DNS,Attempt 3rd, then 5th

 

CIRCUIT DESCRIPTION:

This test verifies the transmission is maintaining proper ratio while in second range.

 

ACTION TAKEN WHEN THE DTC SETS:

When DTC P0732 is active,the following conditions will occur:

1 The TCM attempts to shift to third range. lf unsuccessful, the TCM commands fifth range.

2 While diagnostic response is active,the TCM ignores shift selector inputs.

3 The CHECK TRANS light illuminates.

4 DTC is stored in the TCM history.

5 TCM inhibits TCC engagement.

6 TCM freezes shift adapts (DNA).

CONDITIONS FOR CLEARING THE DTC/CHECK TRANS LIGHT:

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DIAGNOSTIC AIDS:

DTC P0732 may be caused by:

1 Output sat speed sensor signal circuit issues.

2 Turbine shaft speed sensors signal circuit issues.

3 Low clutch pressures,main pressure,or control main pressure.

4 Control module issues like stuck/sticky valves,mechanically defective solenoids,broken springs damaged valve bores,plugged suction filter,damaged gaskets,excessive leaks to exhaustet.

5 Internal transmission damage.

6 Off-going or on-coming clutch issue.

7 Issue with TCM.

 

More Allison repair case,please refer to Allison Trouble Repair