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Auto Trans Issue

Discussion in '1st Gen. Tacomas (1995-2004)' started by Firefighter160, Sep 7, 2009.

  1. Sep 7, 2009 at 7:56 PM
    #1
    Firefighter160

    Firefighter160 [OP] Well-Known Member

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    Josh
    Eastern VA
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    I have a 98 Tacoma 4cyl, 4wd, auto with 182k miles on it. Today I pulled up to a stop sign and went to take off and the truck was still in high gear, it didnt down shift and take off untill I manually put the shifter in 1st. The fluid is good and Ive kept it changed. What could this be?
     
  2. Sep 7, 2009 at 8:03 PM
    #2
    4WD

    4WD cRaZy oLdmAn

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    Grey wire MOD, deck plate, diff breather MOD, 2nd gen. OME 883# on Tundra 5100's, OMD custom 3" leafsprings, rear shock relocation, Ivan Stewart TRD rims w/285/75/16's, '02 bumper MOD, Famous Fabrications sliders , LED interior/exterior lights, bed bar, Custom tube bumper, Old school KC day lighters,Red Ring 8" HID flood, Kenwood vhf 2M.. umm some other shit I'm forgetting right now
    Maybe a little more info is needed but it sounds like the modulator could be the problem I'm not sure if they are vacuum accuated(mechanical) or if its electric, but if it was all good up til now I'd start looking there. A modulator pretty much regulates the upshifting & down shifting of an automatic either by vacuum pressure thru throttle (the more accelerator, the more vacuum pressure developed) or by pulse (if electric) check any vauum hoses for cracks ,breaks or maybe just fell off, leading to the transmission. Good luck
     
  3. Sep 9, 2009 at 4:02 PM
    #3
    Firefighter160

    Firefighter160 [OP] Well-Known Member

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    The trans is electric controlled so no vacuum modulator. It does it some days and some days its fine.
     
  4. Sep 13, 2009 at 3:47 PM
    #4
    Firefighter160

    Firefighter160 [OP] Well-Known Member

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    Eastern VA
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    05 DCSB Offroad
    Ok so found out it could be a shift solenoid problem, anyone heard or messed with it?
     
  5. Sep 14, 2009 at 5:11 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    It should throw a code for a shift solenoid malfunction. When was the last time the fluid/filter (think it is a screen) changed?
     
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