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Check Trans light flashing and it gets stuck in gear

I have a 2010 freightliner Cascadia with the eaton fuller automatic (smartshift) I am having problems with the xy shifter / trans getting stuck when down shifting. the "check trans" light flashes and it will get stuck in 8th gear. If I stop and turn the engine off and try to let the gears recycle it won't start. I had the clutch replaced (by freightliner) i've had the two xy sensors, the speed sensor and the output sensor replaced. I had all the grounding checked and I replaced 4 of the 8 batteries and its still acting up. Do you know what else it could be?

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Chosen Solution

Retrieving Fault Codes

1. Place the shift lever in neutral.

2. Set the parking brake.

3. Turn the ignition key ON but do not start the engine. If the engine is already running, you may still retrieve codes, however, do not engage the starter if engine stalls.

4. To Retrieve Active Codes: Start with the key in the ON position. Turn the key OFF and ON two times within five seconds ending with the key in the ON position. After five seconds, the gear display begins flashing two-digit fault codes. If there are no active codes the gear display will show code 25. If there are inactive codes PD (Product Diagnostic mode) will be displayed. The vehicle will not start in PD mode. You must turn vehicle key OFF and allow the system to power down to exit PD mode before restarting. To start engine turn key off and wait for the transmission to power down.

5. To Retrieve Inactive Codes: Start with the key in the ON position. Turn the key OFF and ON four times within five seconds ending with the key in the ON position. After five seconds, the gear display begins flashing two-digit fault codes. If no codes are active, the gear display will flash code 25 (no codes).

6. Two digit fault codes will be displayed in the gear display. Record the codes. A one or two second pause separates each stored code, and the sequence automatically repeats after all codes have been flashed.

Clearing Fault Codes

1. Start with the key in the ON position. Turn the key OFF and ON six times within five seconds, ending with the key in the ON position.

Note: If the codes have been successfully cleared, the service lamp will come on and stay on for five seconds.

2. Turn the key OFF and allow system to power down.

2 TIMES

4 TIMES

6 TIMES

OFF ON

OFF ON

OFF ON

Fault Codes Description

Fault Codes Description





11 No ECU. Operation Test

43 Range Solenoid Valve



12 Improper ECU Configuration

44 Inertia Brake Solenoid Coil



13 J1939 Control Device

45 Inertia Brake Performance



14 Invalid Shift Lever Voltage

46 Splitter Solenoid Valve



16 High Integrity Link

51 Rail Position Sensor



17 Start Enable Relay

52 Gear Position Sensor



25 NO CODES

56 Input Shaft Sensor



26 Clutch Slip

57 Main Shaft Sensor



27 Clutch Disengagement

58 Output Shaft Sensor



28 Clutch System

61 Rail Select Motor





31 Momentary Engine Ignition Interrupt Relay MEIIR

63 Gear Select Motor



32 Loss of Switch Ignition Power Test

71 Unable to Disengage Gear



72 Failed to Select Rail

33 Low Voltage Supply



73 Failed to Select Gear

34 Weak Battery Voltage Supply



74 Engine Failed to Respond

35 J1939 Communication Link



75* Power Down in Gear

36 J1939 Engine Message Test



83 Shift Lever Missing

37 Power Supply



84 Shift Controller Device Not Configured

41 Range Failed to Engage



42 Splitter Failed to Engage

85 Shift Control Device Incompatible

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Comments:

Oh wow....Thank you very much.

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OK...I'm looking at the "JPRO" diagnostic report that the TA mechanic ran after we replaced the sensors and it shows (SAE-shift finger gear actuator 1- current below normal or open circuit..... SID 40) and (SAE-transmission shift finger gear actuator 1- current below or open circuit - SPN 773) I called freightliner parts dept to see what this means and he said it could possibly be the xy shifter but I can't afford to leave my truck there for another 14 days.

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