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

Front End "bucking" hard when 4x4 is engaged

Discussion in '1st Gen. Tacomas (1995-2004)' started by DFM5, Dec 8, 2013.

  1. Dec 8, 2013 at 9:50 AM
    #1
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    Had a pretty bad snow storm last week in CO. Threw the truck in 4hi and the front end started "bucking" really hard! (Bounced my coffee out of the cup holder and all over the passenger seat) 4x4 engages and disengages just fine but it feels like the gears are just bouncing instead of seating together. Does anybody have any input as to what the problems could be? Tcase? Hubs? Front Diff? I can't imagine it would be the front diff because the front diff is still in use even when the truck is in 2hi and there are no problems. The front drive shaft seems to be all good as well. My clutch has been acting a little finicky lately as well.. Pretty sure it is going out, but could that possibly be the issue?

    Anything helps.

    Thanks
    D
     
  2. Dec 8, 2013 at 9:56 AM
    #2
    kirkofwimbo

    kirkofwimbo Say no to Bro

    Joined:
    Jul 17, 2010
    Member:
    #40338
    Messages:
    2,058
    Gender:
    Male
    First Name:
    Clayton
    Wimberley, TX
    Vehicle:
    ‘21 Tundra SR 4x4
    Clutch slippage could definitely cause bucking. Any difference in size between front/rear tires? Truck ever been regeared?
     
  3. Dec 8, 2013 at 9:59 AM
    #3
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

    Joined:
    Jun 18, 2010
    Member:
    #39131
    Messages:
    36,195
    Gender:
    Male
    First Name:
    Mike
    Massachusetts
    Vehicle:
    '19 Ford F-250 6.7 SCrew
    F-250 Land Yacht Mod
    Change the diff fluid and see if there are any metal chunks. I would also wonder if the rear had been regeared and not the front. How long have you had the truck and have you ever had it in 4wd before?
     
  4. Dec 9, 2013 at 11:28 AM
    #4
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    Tires are the same size on front and back.. I did put in a new rear diff about 2 months ago. Never had an issue with 4wheel prior to that change. Had a guy I know who works at the dealership do it for me. I would assume he geared it correctly..
     
  5. Dec 9, 2013 at 11:29 AM
    #5
    OZ-T

    OZ-T You chose ... wisely

    Joined:
    Dec 15, 2009
    Member:
    #27584
    Messages:
    47,907
    Gender:
    Male
    First Name:
    Peter North
    British Columbia
    Vehicle:
    Mag Grey 09 Trd Sport DCLB 4x4
    OME 885x , OME shocks and Dakars , Wheelers SuperBumps front and rear , 275/70/17 Hankook ATm , OEM bed mat , Weathertech digifit floor liners , Weathertech in-channel vents , headache rack , Leer 100RCC commercial canopy , TRD bedside decals removed , Devil Horns by Andres , HomerTaco Satoshi
    Were you turning when this bucking occured ?
     
  6. Dec 9, 2013 at 11:33 AM
    #6
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    I have had the truck for close to 3 years.. Lived in Colorado the whole time so I use 4x4 pretty regularly during the winter. Plus do a good bit of off roading stuff. I put in a new rear diff a couple months ago. Could that be geared differently causing the bucking?
     
  7. Dec 9, 2013 at 11:34 AM
    #7
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    Its pretty much all the time. If i get it over 5 mph in 4wd it starts bouncing hard
     
  8. Dec 9, 2013 at 11:37 AM
    #8
    bldegle2

    bldegle2 OldPhart

    Joined:
    Apr 16, 2013
    Member:
    #102169
    Messages:
    1,594
    Gender:
    Male
    San Francisco, Ca.
    Vehicle:
    2009 Prerunner TRD AccessCab
    Pretty much stock for now. New Navigation DVD/CD/TV/AV/Bluetooth Stereo and seat mod spacers added so far.
    I would be looking at the new gears as primary suspect as this started after the swap, triple check gear ratios, even if it means pulling the new third member to check, I think they have some kind of tab with a number or gear info you can check, hopefully saving a yank...
     
  9. Dec 9, 2013 at 11:55 AM
    #9
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    Where would I find that info? That is why I had the dealership do it b/c I have very little knowledge with diffs and gearing ratios and what not.
     
  10. Dec 9, 2013 at 12:05 PM
    #10
    whahahajr

    whahahajr Lone Star Club

    Joined:
    Jun 24, 2012
    Member:
    #81279
    Messages:
    640
    Gender:
    Male
    First Name:
    jimbob
    New Braunfels, Tx
    Vehicle:
    07 Tacoma TRD
    Camburg Uniball UCA, ARB Front Bumper, TAG rear bumper, OME rear shocks, All Pro 3" leaf springs
    Check your bolts for the front diff drop bracket. I had the same thing happen on my old truck could not figure it out till the bolt disappeared and took out the CV and shock with it.
     
  11. Dec 9, 2013 at 12:25 PM
    #11
    se7enine

    se7enine MCMLXXIX

    Joined:
    Apr 18, 2013
    Member:
    #102322
    Messages:
    19,795
    Gender:
    Male
    Reno, NV
    Vehicle:
    98 Tacoma SR5 Xtra Cab 3.4L
    Should be able to jack up the rear and count the rotations of the drive shaft per wheel rotation. 4 1/2 rotations is roughly 4.56 gearing, a little over 4 spins is 4.10. That's the simple way to check. Should work for the front as well.
     
  12. Dec 9, 2013 at 2:51 PM
    #12
    DFM5

    DFM5 [OP] Member

    Joined:
    Dec 8, 2013
    Member:
    #118123
    Messages:
    21
    Gender:
    Male
    First Name:
    Daniel
    Colorado
    Vehicle:
    02 TRD 6" Fabtech lift
    6" Fabtech lift
    Went digging through the glove box and found old paper work for when the previous owner had the 6" fabtec lift put in.. He had it regeared to 4.56. When I had the dealership put in the new rear diff. the instaled a 4.10 which is the stock gearing. So thanks for the tips guys. Now I get to go fight with the dealership to fix it!
     
  13. Dec 9, 2013 at 3:21 PM
    #13
    whahahajr

    whahahajr Lone Star Club

    Joined:
    Jun 24, 2012
    Member:
    #81279
    Messages:
    640
    Gender:
    Male
    First Name:
    jimbob
    New Braunfels, Tx
    Vehicle:
    07 Tacoma TRD
    Camburg Uniball UCA, ARB Front Bumper, TAG rear bumper, OME rear shocks, All Pro 3" leaf springs
    Dang that sucks.
     
  14. Dec 9, 2013 at 3:38 PM
    #14
    tan4x4

    tan4x4 Well-Known Member

    Joined:
    Nov 30, 2011
    Member:
    #67982
    Messages:
    3,810
    Gender:
    Male
    First Name:
    Rick
    Folsom, CA
    Vehicle:
    99 Tacoma EC 4x4 2.7L Auto
    Bilsteins, OME 881's, 3-leaf AAL, Detroit TruTrac, Tundra brake swap, Michelin LTX AT2, Tranny skidplate, TC skidplate, CBI rear bumper, TG sliders, UltraGauge, PowerTank, Reverse Camera
    You might lose that fight. They assumed stock gears and had no reason to assume anything else. Hopefully, if they take pity on you, they might just charge for labor to install proper diff, to keep your business.

    On second thought, the tech should have noticed the 6" lift, and asked you if it had been re-geared. Were the tires bigger than stock?
     
    Last edited: Dec 9, 2013
  15. Dec 9, 2013 at 4:35 PM
    #15
    bldegle2

    bldegle2 OldPhart

    Joined:
    Apr 16, 2013
    Member:
    #102169
    Messages:
    1,594
    Gender:
    Male
    San Francisco, Ca.
    Vehicle:
    2009 Prerunner TRD AccessCab
    Pretty much stock for now. New Navigation DVD/CD/TV/AV/Bluetooth Stereo and seat mod spacers added so far.
    The only way to find out is go in with a smile and start a discussion, maybe have the gearing information at the top of glove box so when opened it is the first thing you see...if you had bigger tires and a lift, that should have set alarms bells off for gearing, first thing is they should have verified what was in there to begin with, and, just to make it more their fault, all they had to do was examine the one that came out FIRST, very simple, it would have been obvious before anything went back in...


    good luck, I hope you win this one...
     
  16. Dec 9, 2013 at 7:12 PM
    #16
    whahahajr

    whahahajr Lone Star Club

    Joined:
    Jun 24, 2012
    Member:
    #81279
    Messages:
    640
    Gender:
    Male
    First Name:
    jimbob
    New Braunfels, Tx
    Vehicle:
    07 Tacoma TRD
    Camburg Uniball UCA, ARB Front Bumper, TAG rear bumper, OME rear shocks, All Pro 3" leaf springs
    Clearly they never test drove it either.
     

Products Discussed in

To Top