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Clutch Test on ALLISON Transmission using ALLISON DOC Software

Clutch Test

Figure 1.1 - Clutch Test (5th Gen/ Allison 4700 OFS)

Clutch Test Enabled
  • For Allison 5th Gen Control systems (excluding CEC5), 4th Gen Control systems (excluding CEC3) and 1000/2000 (Allison Pre-4th Gen Control) systems, it displays the Clutch Test floating tool bar.
  • The Clutch Test Enabled allows the user to command any forward range by selecting it from a floating window (reverse is not a selectable range).


#To Initiate the Clutch Test
1). Connect ALLISON Transmission using ALLISON DOC Software. Read More: How to Connecting ALLISON Transmission using ALLISON DOC Software.
2). After connected, click on Action Request - Clutch Test Enabled drop-down menu. 
→A warning message similar to the following, displays.
→Please comply with displayed conditions and click OK to acknowledge.
Figure 1.2 - Warning Message (Allison DOC)

3). Select Drive/D (for the 1000/2000 Product Families), or the highest range (for the 3000/4000 or TC10 Product Families) from the Shift Selector. At this point, 1st range is attained and highlighted on the Clutch Test floating window.
Figure 1.3 - Clutch Test (1st Range/ 5th Gen 4700 OFS) 
Figure 1.4 - Clutch Test (1st Range/ 4th Gen 4700 RDS) 

4). If desired, click on the range you want the Transmission to attain.
Figure 1.5 - Clutch Test (2nd Range/ 5th Gen 4700 OFS)
Figure 1.6 - Clutch Test (3rd Range/ 5th Gen 4700 OFS)
Figure 1.7 - Clutch Test (4th Range/ 5th Gen 4700 OFS)
Figure 1.8 - Clutch Test (4th Range/ 4th Gen 4700 RDS)

5). On Shift Selector display also will change the gear (1st - 5th gear), depending on the range while perform Clutch Test through Allison DOC.
Figure 1.9 - 4th Range (5th Gear on Shift Selector) 
  • While a specific gear is being selected and maintained by the Clutch Test mode, the TCM will command the TCC ON and OFF, depending on the Transmission operational conditions (i.e. being in Clutch Test mode does not guarantee the constant application of the TCC). The TCM is always in control of the TCC application.
  • The Transmission will maintain the selected range until the TCM determines that the operational conditions constitute a risk to the Transmission hardware. At this point, the TCM will command an up or downshift to eliminate that condition of risk. The service tool command (i.e Clutch Test) cannot force the Transmission to stay in a specific range under these circumstances. Sometimes, you will get a warning message as displays below:
Figure 2.1 - The Commanded Gear did not change









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