allison code 2511

Discussion in 'General RVing' started by directorz, Apr 1, 2005.

  1. directorz

    directorz New Member

    Hello experts. I've got an Allison 3060 w/ pto and she won't shift past 1st. I've got a code 2511. Does this refer to a speed sensor? I noticed a broken off wire on the underside of the trani on a hydraulic line (only one I see). Could this be causing the error or is there something more serious going on. Appreciate your comments and thanx in advance.

  2. Bush70

    Bush70 New Member

    allison code 2511

    Yes, 25-11 is an output speed sensor fault. Make sure fluid level is OK and check wiring and connections at sensor and ECU. Could also be short in wiring harness. Good Luck
  3. transrand

    transrand New Member

    allison code 2511

    There has also been a problem with tone wheel wear. You can check it easily by removing the output speed sensor. Using a scribe or a small scredriver see if the tone wheel moves back and forth freely.

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