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Daniel Wilson
Daniel Wilson,
Category: Medium and Heavy Trucks
Satisfied Customers: 4394
Experience:  Owner at DJ Wilson
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I have eaton ultra shift if works fine but it keeps flasing

Customer Question

Customer: I have eaton ultra shift if works fine but it keeps flasing F all the time. I checked for codes no codes expect 25 and 88
JA: Thanks. Can you give me any more details about your issue?
Customer: Nothing if works fine I cleard the codes but still flashing F
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Submitted: 11 months ago.
Category: Medium and Heavy Trucks
Expert:  Daniel Wilson replied 11 months ago.

Hi my name is***** will be glad to help. What is the model number of your transmission?

Expert:  Daniel Wilson replied 11 months ago.

Click on this link for the troubleshooting info .

Troubleshooting

Expert:  Daniel Wilson replied 11 months ago.

Invalid Shift

Lever Voltage

(will show “F” in the display)

Check the harness and voltage to the shift panel and TCM. The schematics are in the link I posted to identify the circuits. Let me know

Customer: replied 11 months ago.
Ok I will try that tomorrow and let you know
Expert:  Daniel Wilson replied 11 months ago.

Sounds good. There is also a power up sequence test shown in the manual. Its lengthy but follow through the steps and let me know how you make out.

Customer: replied 11 months ago.
Dan, I tried every thing still the same keep getting F
Expert:  Daniel Wilson replied 11 months ago.

Hi Paul Thanks for the update. What did you get for voltage to the shift panel and TCM? How did you make out with the results of the power up sequence in the manual? What were the results from those tests?

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