Question about 1994 Isuzu Trooper

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Isuzu bighorn automatic transmission slips after heating

My Isuzu bighorn automatic transmission slips after heating.it onlyhappens after a long drive them it start to slip.when you stop and turnoff the engine for a few seconds then turn on,it becomes ok!i need asolution.my engine is a v6

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  • jikazug Nov 01, 2009

    when it slips it cant move even if you rave up the engine or even you you put in D1,D2,L...

  • byaruhanga Robert
    byaruhanga Robert Oct 24, 2013

    it moves when you put to L

  • Aguinaldo Lopes Machirica

    My Izusu Boghorn 3.2 l, the speedmetter is working and the automatic transmission gear is not changing spead, and the check transmission warning light comes on. some time the speadmeter works and on that time the gear boxe also start chenging the speeds. what are the probllem?

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Change your gearbox oil, and clean out the oil strainer.
Should help.

( On some models, you have to remove the gearbox oil pan to clean the strainer )

Posted on Nov 01, 2009

  • Ruben Feb 04, 2012

    Had the same problem, and changed ATF and strainer, but problem persist.

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Hi, i have got Isuzu Bighorn 3.1D 1993 model. When i drive the startoff pick up is quite heavy and seems like little bit slow in changing auto transmission gear. also when going up hill seems like the whole van seems like rattles and goes little bit slow. ta

Posted on May 13, 2012

  • Mitchel Licopit
    Mitchel Licopit Jun 13, 2016

    Hi, I also have a Isuzu Bighorn 3.1 1992 model, we have the same issue about what happen to our bighorn, it happens to me just recently when i shift to drive it moves but very slow even if you step on the pedal on high rpm, i am just wondering what did you do to fix your bighorn? what is causing the problem? you can reach me at this email porbida220@yahoo.com.. hope to hear from you Raj..thanks

  • Anonymous Jul 17, 2016

    2009 post.
    never post emails on the net, unless 10,million spam are fun per day.
    wow, that is bad bad bad....
    delete it. or learn to start your own post
    you revived a 2009 relic post there.

    the op has flare(slip) and never said.
    levels ok. and ATF not looking like metal flake tar?
    1: does it in all gears.
    2: even reverse.
    3: what 4speed box is there, ours has different drive lines in USA>
    4: does it flare 1 to2 , or 2 to 3 or 3 to 5?
    5: does the stall test fail, in drive. and R.? both, or non?
    6: if yes, stall test fails, we do line pressure test next. after filter change.
    like that? the FSM book covers all on car tests. ever thing to read the book,, ?
    this is a usa forum
    if not a usa car, our books are mostly useless to you.. vastly.
    engine and trans options vary by COUNTRY.
    (laws and such)

    my guess is OP back in 2009 had car serviced
    and found and found box , end of the line.
    DOA

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When it slips it cant move even if you rave up the engine or even you you put in D1,D2,L...?

Posted on Feb 09, 2012

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Not check levels first.
and cable damage? (linkages)
get it serviced,
try a full flush and fill, (with machine) and a new filter.
is engine overheating
pulling huge loads, , in car or trailer.
going up huge mountains on a hot day? what
or just buying milk at 7/11 ?
answer with full context of a trip, like how far and out door temps
and elevation, and if hills, and what not.

Posted on Jun 13, 2016

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Just put an external transmision oil cooler infront of the radiator.The standard cooler runs in the radiator @ 80-130 degrees celcius,NO GOOD oil gets to hot and it also raises the heat-gauge, engine runs to hot. Problem solved. Happy driving.

Posted on Mar 25, 2013

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do not let it slip or the clutch packs burn to a crisp fast !

get a full flush and filter. and cross fingers.
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