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Thread: Popping/binding in front end

  1. #1
    Junior Member
    Join Date
    Dec 2006

    Popping/binding in front end

    I have a 99 K2500 crew cab that acts like it is in 4 wheel drive all the time.

    Whenever you turn it feels like it has a locking differential in the front end with the 4WD engaged. When I do engage the 4WD it gets worse.

    I don't hear any sort of noise when driving straight so I don't know if my CV joints are shot or not.

    Have any of you had issues like this and are willing to steer me in the right direction.

  2. #2
    Senior Member
    Join Date
    Jan 2008
    i've noticed worn cv joints on fwd cars when turing extreme sharp and giving it quite a bit of torque.

    might want to make sure the actuator motor is pulling it all the way out of gear in the front diff.
    1996 Z71 white shortbox tinted
    350 30 over
    cats and X pipe
    Alumhds ported 210 cc runners 62 cc chambers 2" int 1.550" ex
    crane lift; 580/580 duration; 216/222
    4L60E w/shiftkit

  3. #3
    Senior Member
    Join Date
    Dec 2007
    are any of your axle boots ripped/torn? or is grease comming out? these are signs that an axle could be failing (due to foreign material finding its way in.) other wise a thing you can try is removing the front differential actuator, it is on the passenger side of front differential, with it out your front diff is "free" and axles should move freely, when you pull it out it should be retracted (in) if its out when unplugged its toast. so check this first, does your 4wd light work in dash properly?

  4. #4
    Senior Member o3shortbed's Avatar
    Join Date
    Jan 2008
    L-burg KY
    if ur truck has a front axel acuitotor(sp) it could be bad and the front axel is locked. it could cause the "feel" of 4wd and not be ib 4wd until u lock it and it gets worse
    1998 Jeep Grand Cherokee Limited 5.2 Full time 4WD NP249

  5. #5
    Junior Member
    Join Date
    Jan 2008

    popping Binding?

    my truck has a locker in the front and when i turn real sharp or one tire in ice or snow or something you can feel it locking and not wanting to turn but it is normal in that respect, never had any problems

  6. #6
    Senior Member
    75K30's Avatar
    Join Date
    Jul 2006
    Quote Originally Posted by o3shortbed View Post
    if ur truck has a front axel acuitotor(sp) it could be bad and the front axel is locked. it could cause the "feel" of 4wd and not be ib 4wd until u lock it and it gets worse

    Very good. This truck does have an actuator, and the axle disconnect is probably engaged. This means that the front axle has to turn all of the drivetrain componets, and could bind the front end a little. While this would only be like driving around with the hubs locked, it could make the front feel heavy.

    What type of front differential did you upgrade to? I am not aware of any "Lockers" available for the stock GM 8.25" IFS front end.
    Besides, even if it had a locker, if the axle disconnect was functional, the locker would exceed greater than 70 RPM differential speed, and it would remain locked all the time. These front axles do not have locking hubs, so the front end would remain locked under normal driving conditions.
    Would like to know what type of locker you have, so I can learn how it works.

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