1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Problem With the Back End

Discussion in '1st Gen. Tacomas (1995-2004)' started by NavyNate06, Jan 8, 2008.

  1. Jan 8, 2008 at 1:06 AM
    #1
    NavyNate06

    NavyNate06 [OP] yeah i fix F/A-18s

    Joined:
    Jan 8, 2008
    Member:
    #4147
    Messages:
    60
    Gender:
    Male
    Virginia Beach, VA
    Vehicle:
    99 Tacoma SR5
    Toytec 3 inch coilovers, OME springs/shocks, Toytec shackles, rattle can paint job, lc headers,
    I'm new to the area so get me if i'm doing something wrong.

    A while back i installed the Revtech 3 inch lift and 33 inch tires and love it. however sometime after the install i started getting a knocking feeling coming from the back end. it only happens when i start off with normal throttle. its a little worse when i hammer it and a little better to non existent when i baby it. it almost feels like i'm getting hit softly by another vehicle. has anyone had this problem? Could it be the blocks are a little off, the differential, CV joints? I've had it on a lift and shook things around but didn't get anywhere. i can't tell if its serious and don't want it to become serious. any help would be great.
     
  2. Jan 8, 2008 at 4:08 AM
    #2
    Janster

    Janster Old & Forgetful

    Joined:
    Mar 25, 2007
    Member:
    #1138
    Messages:
    14,253
    Gender:
    Female
    First Name:
    Jandy
    Lancaster, PA
    Vehicle:
    2016 GMC Canyon SLT w/ LineX and....
    It could be many different things - please pardon, this is all off the top of my head.

    Get it in the garage (or where-ever) and check the blocks & u-bolts again. After you did the install - did you make sure the centering pin was inside the hole on the spring perch? Check these again.... Check your u-bolts and make sure they're tight (they can and will loosen). Check the bolts on your main spring eye hanger and the shackle bolts. Not too tight but not too loose. I'd torque them to about 50ft lbs to start.

    That knocking feeling could also be driveline slop - which may (or may not) be more noticable due to the larger tires/current gearing. Chock the front wheels, Jack up the rear-end, put the truck in neutral and grab the driveshaft and turn it by hand. Is there a certain amount of play before it 'hits' the gears (so to speak)?

    And I would also (while tires are off the ground) - grab each wheel and shake it side to side and back-n-forth (checking bearings, balljoints, etc).

    In general, go around and make sure everything is tight...paticularly the areas that were removed/changed during the install.
     
  3. Jan 8, 2008 at 7:22 PM
    #3
    350TacoZilla

    350TacoZilla Well-Known Member

    Joined:
    Sep 22, 2007
    Member:
    #2767
    Messages:
    1,115
    Gender:
    Male
    Hancock MD
    Vehicle:
    1997 3RZ 5spd 4x4 Reg Cab
    2.7L 3RZ,K&N filter, 4" deck plate mod,flowmaster 40 series,3" suspension lift, hybrid 52"chevy/toyota rear springs.
    maybe a u-joint also....while under truck try to push up or down on driveshaft see if it has play in the joints....also did you add longer shocks? axle wrap can cause a too short shock to hit and give you a thunking noise....
     
  4. Jan 9, 2008 at 7:49 PM
    #4
    NavyNate06

    NavyNate06 [OP] yeah i fix F/A-18s

    Joined:
    Jan 8, 2008
    Member:
    #4147
    Messages:
    60
    Gender:
    Male
    Virginia Beach, VA
    Vehicle:
    99 Tacoma SR5
    Toytec 3 inch coilovers, OME springs/shocks, Toytec shackles, rattle can paint job, lc headers,
    yeah most everything you've suggested i've thought (except the driveline slop) about but theres definately some different ways i could go about troubleshooting that i didn't think about. i definately changed out the shocks since the old ones were too short and completely blown. though i did only install the lower performance ranchos, maybe a higher grade would work better.
     
  5. Jan 15, 2008 at 10:52 PM
    #5
    Brians03Taco

    Brians03Taco Active Member

    Joined:
    Dec 26, 2007
    Member:
    #3979
    Messages:
    42
    Vehicle:
    Its a TeeeRuck
    Alpine head unit with ipod dock, alpine speakers.
    I'm willing to put money on a loose U bolt. Whenever I lift or lower a truck with a block I drive for 500 miles or so and then re-torque the u bolts again. 9 times out of 10 they require a little more love. U bolts stretch a bit when they are brand new.


    ~Brian
     
  6. Jan 24, 2008 at 7:34 PM
    #6
    NavyNate06

    NavyNate06 [OP] yeah i fix F/A-18s

    Joined:
    Jan 8, 2008
    Member:
    #4147
    Messages:
    60
    Gender:
    Male
    Virginia Beach, VA
    Vehicle:
    99 Tacoma SR5
    Toytec 3 inch coilovers, OME springs/shocks, Toytec shackles, rattle can paint job, lc headers,
    well, you seemed to be right brian. i got the truck up on a lift the other day and checked the torque on my u-bolts. the were about 15 pounds off. i got them tightened up and checked the center bearing and the front driveshaft just to make sure i covered everything i screwed with when i installed my lift. so far no problems.
     
  7. Jan 24, 2008 at 8:42 PM
    #7
    Brians03Taco

    Brians03Taco Active Member

    Joined:
    Dec 26, 2007
    Member:
    #3979
    Messages:
    42
    Vehicle:
    Its a TeeeRuck
    Alpine head unit with ipod dock, alpine speakers.

    Glad to hear you worked it out. I hate it when I have a problem that is boggling my mind. Drives me nuts until I finger it out.


    ~Brian
     
To Top