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Head scratcher

Discussion in 'General Tundra Discussion' started by Scotsman459, Nov 19, 2018.

  1. Nov 19, 2018 at 3:23 AM
    #1
    Scotsman459

    #1
    Scotsman459 [OP] New Member

    Joined:
    Nov 19, 2018
    Member:
    #21903
    Messages:
    2
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    Male
    Vehicle:
    2007 tundra
    Hi all.
    So, I bought a new front diff for my 07 tundra. Checked the build sheet with the local dealership with my vin and was informed that my 5.7 limited had a 4.3 front diff with 10inch ring gear... so bought that.
    The old one had the bad bearing.
    Now. I've had the truck a year and it would always show 303 miles when I fill it up with gas... since changing out the diff, it now shows 438 miles to empty... BUT is also getting roughly 1.3mpg less, according to the computer... truck feels so much smoother now, but this seems a bit odd.
    Anyone seen this before?
     
    Scotsman459, Nov 19, 2018
    #1
    Thegr8punkin likes this.
  2. Nov 19, 2018 at 8:55 AM
    #2
    Alexstundra

    #2
    Alexstundra Not a new member

    Joined:
    Mar 20, 2018
    Member:
    #13746
    Messages:
    1,383
    Gender:
    Male
    Northeast PA
    Vehicle:
    2016 MGM DC Trd
    3-1 level kit with add a leaf. 295/70/18r cooper max. Spider head light tail light and third brake light, tint, badges off, ladder racks, trd pro grill, color matched hood bulge, grab handle,coach builder +2, dv8 front bumper with winch, fender flares, bed cover....
    I’ll be the first to say it. Do a simple hand calculation
     
    Alexstundra, Nov 19, 2018
    #2
  3. Nov 19, 2018 at 8:57 AM
    #3
    Y0TA PR0

    #3
    Y0TA PR0 Oil & Gas

    Joined:
    Jan 24, 2016
    Member:
    #2519
    Messages:
    24,519
    Gender:
    Male
    First Name:
    Rafael
    Alberta, Canada
    Vehicle:
    2017 TRD PRO
    WELCOME
     
    Y0TA PR0, Nov 19, 2018
    #3
  4. Nov 19, 2018 at 9:02 AM
    #4
    ColoradoTJ

    #4
    ColoradoTJ Certified tow LEO Staff Member

    Joined:
    Feb 24, 2016
    Member:
    #2766
    Messages:
    40,420
    Gender:
    Male
    Colorado
    Vehicle:
    GMC 3500, Roush Mustang, Jeep Crawler
    Calibrated Power 5 Tune pack, Allison 1000 tune, PPE deep trans pan, Cold/Hot CAC pipes, Banks CAI, PCV reroute, resonator delete, S&B 62 gal fuel tank, B&W GN hitch
    Welcome.

    Did the battery get disconnected? This resets the mileage calculator.

    I had to change out my front diff and my mileage took a pretty good dive even long after break in and changing fluid a couple times.
     
    ColoradoTJ, Nov 19, 2018
    #4
    Thegr8punkin likes this.
  5. Nov 19, 2018 at 9:05 AM
    #5
    Scotsman459

    #5
    Scotsman459 [OP] New Member

    Joined:
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    Yes, the battery did get disconnected. Had the starter motor replaced at the same time.
     
    Scotsman459, Nov 19, 2018
    #5
    ColoradoTJ likes this.
  6. Nov 19, 2018 at 9:08 AM
    #6
    ColoradoTJ

    #6
    ColoradoTJ Certified tow LEO Staff Member

    Joined:
    Feb 24, 2016
    Member:
    #2766
    Messages:
    40,420
    Gender:
    Male
    Colorado
    Vehicle:
    GMC 3500, Roush Mustang, Jeep Crawler
    Calibrated Power 5 Tune pack, Allison 1000 tune, PPE deep trans pan, Cold/Hot CAC pipes, Banks CAI, PCV reroute, resonator delete, S&B 62 gal fuel tank, B&W GN hitch
    Give it time. It will be back down to the cruddy DTE numbers you had before. :D
     
    ColoradoTJ, Nov 19, 2018
    #6
    Thegr8punkin, 15whtrd, Alexstundra and 1 other person like this.
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