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

down shifting an auto.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BlueTaco07, Jun 14, 2011.

  1. Jun 14, 2011 at 4:26 PM
    #1
    BlueTaco07

    BlueTaco07 [OP] Super Mod!

    Joined:
    Jan 2, 2011
    Member:
    #48598
    Messages:
    2,417
    Gender:
    Male
    First Name:
    Cody
    Panama city, Florida
    Vehicle:
    Looking
    Hey guys I for once decided to put my automatic truck to D drove up to about 45 mph and shifted to 4 watch the rpm gauge drop and downshifted to 3 and then 2. Does that effect or harm the tranny in anyway? If not I like the sound of it and wont worry if I do it once in awhile
     
  2. Jun 14, 2011 at 4:30 PM
    #2
    Maticuno

    Maticuno Resident Pine Swine

    Joined:
    May 26, 2011
    Member:
    #57287
    Messages:
    2,902
    Gender:
    Male
    California High Deserts
    Vehicle:
    08 DCLB Sport
    Pioneer AVIC-D3, SWI-PS, Sirius Satellite Radio, 2X In-Cab 110V Outlets, Constant Fog Light Mod, Inverter Always 400W Mod, Anti-Pack-Rat-In-Intake Mod, Eibachs on 5100's, 2" Toytec AAL, B.A.M.F Rear Diff Skid, 265/70R17 Goodyear Wrangler Authority tires
    No. Downshifting at the proper speeds will not cause harm to your transmission. Look in your owners manual to find the appropriate speed range to downshift from.
     
  3. Jun 14, 2011 at 4:32 PM
    #3
    DubyaDawg

    DubyaDawg Underprepared and Overconfident

    Joined:
    Jul 29, 2010
    Member:
    #40929
    Messages:
    466
    Gender:
    Male
    Tulsa/Norman, OK
    Vehicle:
    2010 DC PreRunner TRD Sport
    Avid Light Bar, KC Dayliters, Roll-N-Lock bed cover, TRD Center Caps, Fog Light Anytime Mod.
    "I like the sound of it" lol I like that you're honest. I don't know honestly, I've done it before out of curiosity and obviously nothing happened. But I generally assume its gonna be best (for normal driving) to let the auto tranny do what it thinks is best (in D).
     
  4. Jun 14, 2011 at 4:34 PM
    #4
    beerking

    beerking Well-Known Member

    Joined:
    Mar 8, 2011
    Member:
    #52637
    Messages:
    337
    Gender:
    Male
    First Name:
    Trey
    Utah
    Vehicle:
    09 Access V6 TRD Sport
    All-pro APEX front bumper, 4xInnovation sliders w/kickouts, ATO front skid, Smittybilt XRC-8 winch, Icon 2.5 Front coilovers with 700lb King shocks, 5100's on the rear, TSB Toytec AAL, slimcubby HID headlights, debadged, Magnaflow muffler, AFE drop-in, Python 991 Remote start/alarm, Clarion NX501, Wet Okole's, Weathertech digifit floor mats, Midland CB, Blue 4' Firestik II, Tailgate anti-theft mod, power tailgate lock, rear differential breather relocation & yellow wire mod.
    As long as you're not redlining it then you should be ok, but if your transmission is shifting up and down excessively and heats up enough the fluid will begin to break down and cause damage. As long as you don't go overboard I'd say you're fine.

    The self-shifting is mostly used when towing to prevent overdrive being used a lot, racing or controlling speed when going downhill.
     
  5. Jun 14, 2011 at 4:38 PM
    #5
    Maticuno

    Maticuno Resident Pine Swine

    Joined:
    May 26, 2011
    Member:
    #57287
    Messages:
    2,902
    Gender:
    Male
    California High Deserts
    Vehicle:
    08 DCLB Sport
    Pioneer AVIC-D3, SWI-PS, Sirius Satellite Radio, 2X In-Cab 110V Outlets, Constant Fog Light Mod, Inverter Always 400W Mod, Anti-Pack-Rat-In-Intake Mod, Eibachs on 5100's, 2" Toytec AAL, B.A.M.F Rear Diff Skid, 265/70R17 Goodyear Wrangler Authority tires
    The owners manual actually recommends downshifting the auto to achieve the best engine braking possible and to reduce wear and tear on the brakes. Ever since I've started downshifting regularly, I've noticed that this self learning transmission will occasionally downshift on it's own, right about the time that I normally would.
     
  6. Jun 14, 2011 at 4:49 PM
    #6
    Maticuno

    Maticuno Resident Pine Swine

    Joined:
    May 26, 2011
    Member:
    #57287
    Messages:
    2,902
    Gender:
    Male
    California High Deserts
    Vehicle:
    08 DCLB Sport
    Pioneer AVIC-D3, SWI-PS, Sirius Satellite Radio, 2X In-Cab 110V Outlets, Constant Fog Light Mod, Inverter Always 400W Mod, Anti-Pack-Rat-In-Intake Mod, Eibachs on 5100's, 2" Toytec AAL, B.A.M.F Rear Diff Skid, 265/70R17 Goodyear Wrangler Authority tires
    Maybe I just notice it more now since it does it right about the time I'm about to shift.
     
  7. Jun 14, 2011 at 4:49 PM
    #7
    skytower

    skytower Well-Known Member

    Joined:
    Jun 7, 2010
    Member:
    #38505
    Messages:
    3,228
    Gender:
    Male
    First Name:
    Dave
    virginia
    Vehicle:
    08 Tacoma 4x4
    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    Won't hurt it. Engine braking is your friend. Just another tool in your box to use as needed.
    The trans won't let you shift into a gear that is out of its RPM range.
     
  8. Jun 14, 2011 at 5:03 PM
    #8
    gatlin69

    gatlin69 Retired?

    Joined:
    Feb 5, 2011
    Member:
    #50578
    Messages:
    434
    Gender:
    Male
    First Name:
    Scott
    Tampa
    Vehicle:
    4x4
    Nerf bars, bug shield,skid plate, coming soon (hopefully) DVD NAV
    Living in Colorado, it will extend your brake life if used correctly.
     
  9. Jun 14, 2011 at 5:05 PM
    #9
    Bfoster133

    Bfoster133 If i asked my dad for money, He'd knock me out

    Joined:
    Apr 24, 2011
    Member:
    #55492
    Messages:
    1,803
    Gender:
    Male
    First Name:
    Blake
    Thousand oaks, California
    Vehicle:
    2011 PreRunner TRD offroad
    15% Tint, 5100's at 1.75, Rear Diff Breather, CB radio, Black rattle canned rims, 265/75/16 Goodyear MTR, Magnaflow Offroad pro cat back, hi-lift bed mounted, shovel bed mounted
    +1

    tacomas are advanced enough to not shift into a gear that will hurt the truck, its all in the owners manual if you want mor info and the chart
     
To Top