Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

transmission slow to change range

Discussion in 'Trucks [ Eighteen Wheelers ]' started by gunner76, Dec 12, 2015.

Page 1 of 2
  1. Dec 12, 2015 #1
    gunner76

    gunner76 Medium Load Member

    500
    137
    Mar 11, 2010
    IA
    0
    I've noticed since It's gotten cold my transmission is slow to go into high range when I first leave in the morning. In order to get it to go into high I have to flip the lever back and forth a few times then it will work fine the rest of the day. then after sitting all night it will act up again the first time I try and change the range. There are no leaks anywhere and I'm running synthetic fluid in the trans. Other winters it was a little slow to shift into high but not as slow as it is now and before it usually wouldn't act up until the temps were single digits or below zero. Now it's been doing it when the temps are in the low 30's. Any ideas what causes this?
     
    gunner76, Dec 12, 2015
    gunner76, Dec 12, 2015
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Dec 12, 2015 #2
    DaveLV

    DaveLV Light Load Member

    182
    261
    Sep 18, 2015
    0
    My first guess is the orings in the range cylinder are getting nasty. If you have your air dryer bypassed or have had it for any amount of time might have let moisture in. The silicone grease will bug up over time when mixed with moisture and any oil residue. That would be the first thing I would look at. Could be as simple as replacing the orings.
     
    DaveLV, Dec 12, 2015
    DaveLV, Dec 12, 2015
    #2
    Bean Jr. Thanks this.
  4. Dec 12, 2015 #3
    BoxCarKidd

    BoxCarKidd Road Train Member

    4,525
    6,586
    Aug 26, 2014
    0
    Most likely to do with the air control and or slave pistons. If you put something like Marvel Mystery Oil in the lines so it gets to both side of all valves it may correct it temperarerly. Long term you have a reacurring problem and if you do not issolate and repair it will eventually shut you down.
     
    BoxCarKidd, Dec 12, 2015
    BoxCarKidd, Dec 12, 2015
    #3
  5. Dec 12, 2015 #4
    Cory wood

    Cory wood Medium Load Member

    335
    162
    Nov 7, 2015
    0
    Range selector piston or orings, or slave valve is gummed up. Nothing to major hopefully, what kind of tranny?
     
    Cory wood, Dec 12, 2015
    Cory wood, Dec 12, 2015
    #4
  7. Dec 12, 2015 #5
    Ozdriver

    Ozdriver Heavy Load Member

    767
    1,390
    Oct 16, 2015
    Australia
    0
    True, or just put an O ring kit through them. Too easy.
     
    Ozdriver, Dec 12, 2015
    Ozdriver, Dec 12, 2015
    #5
  8. Dec 12, 2015 #6
    Cory wood

    Cory wood Medium Load Member

    335
    162
    Nov 7, 2015
    0
    Depending on the tranny it's easy. Fro series you have to take the shift top off
     
    Cory wood, Dec 12, 2015
    Cory wood, Dec 12, 2015
    #6
  9. Dec 12, 2015 #7
    gunner76

    gunner76 Medium Load Member

    500
    137
    Mar 11, 2010
    IA
    0
    it's a RTLO 13spd(if memory serves me). I'll check into the o ring kit.
     
    gunner76, Dec 12, 2015
    gunner76, Dec 12, 2015
    #7
  10. Dec 12, 2015 #8
    Cory wood

    Cory wood Medium Load Member

    335
    162
    Nov 7, 2015
    0
    That's easy then, should be right on the back of the tranny upper right side
     
    Cory wood, Dec 12, 2015
    Cory wood, Dec 12, 2015
    #8
  11. Dec 13, 2015 #9
    Pool6710

    Pool6710 Medium Load Member

    662
    258
    Aug 10, 2014
    Minnesnowta
    0
    my truck has done this for years. Just flip it from low to high and wait for it to click in. Put it back in low and it works normal. Don't worry about it.

    When it gets to -20 it sometimes takes a bit.
     
    Pool6710, Dec 13, 2015
    Pool6710, Dec 13, 2015
    #9
  12. Dec 14, 2015 #10
    bavarian

    bavarian Heavy Load Member

    730
    785
    Feb 13, 2014
    Winnipeg
    0
    I had the same problem. It got worse as colder it was. The problem was solved as I put an overhauled tranny in. The oilcooler leaked coolant into tranny. I know the leaking cooler had nothing to do with the slow changing ranges when cold but was solved with the other tranny.

    If it could be fixed by a few O-rings, I'd go with it.
     
    bavarian, Dec 14, 2015
    bavarian, Dec 14, 2015
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

    • Page 1 of 2