ExpeditersOnline.com
Try Hours
Bolt Express
Results 1 to 5 of 5
  1. #1
    Senior Member jjoerger's Avatar
    Join Date
    Feb 2009
    Location
    Lake City, FL
    Posts
    2,059

    Ultrashift shifting problem?

    A few days ago our Ultrashift transmission started acting up. It would not go into gear at times either up shifting or down shifting. We had to pull over on the side of the road and shut our battery switch off for 2 minutes to get the transmission to reset. This went on several times for about 24 hours.
    A driver told us that most of the Ultrashift problems were electrical. He told me to spray WD 40 on the battery terminals. Since there was nothing to lose by trying this I did. And the transmission has been working fine since. 3 days and 1800 miles with lots of shifting in the northeast and the mountains between Connecticut and Florida. (Today I pulled the battery cables off and cleaned all the connections until they were nice and shiny.)
    I plan to take it to the shop Tuesday to have it checked out.
    Is there anything they can do if it is operating properly or am I just wasting my time and money?
    Jim and Shayne Joerger
    FedEx Custom Critical D8183

  2. YOU decide your loads, your schedule, your home time with Landstar
    Landstar Express America
    As a "Business Capacity Owner" or BCO with Landstar, you control your business the way YOU want. You select the freight. You set your schedule. You decide on home time. At Landstar, owner/operators are compensated based on a fixed percentage of the revenue generated from the freight they haul. As rates increase, so does your compensation. Landstar is hiring Owner/Operators... Apply now!
     

  3. 1,445928,48026,8
  4. #2
    Member matlack's Avatar
    Join Date
    Jan 2009
    Location
    North Carolina
    Posts
    68

    Re: Ultrashift shifting problem?

    We had similar problems and it was corrosion inside the battery cut off switch housing.

    When I took it apart it looked like a molded box of baking soda fell out it.

    We replaced the cutoff switch.

    You can bypass the cut off switch to test and see if that is the problem.

    This also solved the fault code that was showing on the digital readout at engine startup.

    Also check the fuses, relays and circuit breakers; sometimes the can become loose.
    Matlack - Pipeline on Wheels

  5. 2,445934,48026,8
  6. #3
    10K Member cheri1122's Avatar
    Join Date
    Jul 2005
    Location
    Strongsville, Oh, USA.
    Posts
    10,638

    Re: Ultrashift shifting problem?

    A tech told me the same thing: when the transmission goes into 'defense' mode, [refusing to shift], the problem is electrical. If the battery cables were the whole problem, it's solved.

    DELIVERING THE FUTURE, WHATEVER IT TAKES.
    OOIDA 743749

  7. 3,445943,48026,8
  8. #4
    Senior Member jjoerger's Avatar
    Join Date
    Feb 2009
    Location
    Lake City, FL
    Posts
    2,059

    Re: Ultrashift shifting problem?

    I checked my codes and had 3 inactives.
    72-Failure to select a rail.
    73-Failure to engage a gear.
    91-Check of the wiring integrity.

    I am thinking that I will take it in to the shop and have the fluid changed and clutch adjusted and see if having the ECU reprogrammed would benefit me. Hopefully when it is hooked up to the computer they will be able to tell if there are any other problems.
    Jim and Shayne Joerger
    FedEx Custom Critical D8183

  9. 4,446031,48026,8
  10. #5
    Member matlack's Avatar
    Join Date
    Jan 2009
    Location
    North Carolina
    Posts
    68

    Re: Ultrashift shifting problem?

    We had ours hooked up at the Freightliner Dealer and it showed like two pages of errors, most of the codes made no sense which lead the tech to suspect the Motherboard, but all was fine after by-passing the cutoff switch.

    The cutoff switch looked fine from the outside of it, but the inside must have sweated as the internal parts of it had badly corroded.
    I estimate over three tablespoons of corrosion fell out it once it was taken apart.

    This switch was mounted through the floor of the cab beside the driver's seat, with the lever part on the inside of the cab but the housing and it's battery cable connections underneath (outside of) the cab.

    Also after by-passing the Cutoff switch it was like having fresh batteries as the starter turned much faster.

    New cutoff switch cost varies around $40 and are available in different Parts Stores.

    Matlack - Pipeline on Wheels

  11. 5,446043,48026,8

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
ExpeditersOnline.Com Copyright © 1999-2011 On Time Media, LLC. All Rights Reserved.
ExpeditersOnline.com © is a registered trademark of On Time Media, LLC

Search Engine Optimization by vBSEO 3.6.0 PL2