ISUZU NPR TRANSMISSION SHIFT PROBLEM

Discussion in 'Transmission Forum' started by br549, Jan 2, 2009.

  1. br549

    br549 Newbie

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    HAVE 1999 DIESEL NPR BOX TRUCK,NO PREVIOUS PROBLEM UNTIL LAST WEEK. TRUCK WAS IN SOME MUD ON ONE SIDE,TRUCK IN DRIVE MADE POP SOUND ,AT NEXT STOP TRUCK WOULD NOT PULL OFF IN DRIVE,YOU NOW HAVE TO PUT SHIFTER IN LOW RANGE TO GET IT GOING AND THEN SHIFT UP TO DRIVE ONCE YOU GET IT GOING,DRIVES FINE TO NEXT STOP , HAVE TO REPEAT SAME PROCESS. FLUID LEVEL OKAY. ANY HELP WOULD BE APPRECIATED
     
  2. crunch

    crunch wrench

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    A pop is usually something broke. :ROFL
    Any check engine or transmission lights on?
    Take off cap lock.
    All big letters are hard on my eyes like this.
    WHAT TRUCK AND ENGINE AND TRANSMISSION AND MILEAGE?
    GET A SCANNER ON IT AND CHECK FOR CODES AND CHECK OUT ALL DATA READINGS.
    Pull transmission pan and see if any metal parts in pan.
    Or Just
    Find someone that is trained on that transmission and truck and have the check it out.
     
  3. br549

    br549 Newbie

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    Thanks for the reply
    Truck is a 1999 isuzu npr,motor : 4HE1-TC,Trans: auto_ AISIN SEIKI Ser. #9C0756,Mileage 130 K
    Transmission will not engage in drive or second,if you put in 1 st position truck will jump as it is supposed to do and pull off as it should,once it is going you can shift to drive and it works fine until you have to stop and then you have to shift back to 1 st position again to get it going again. Truck will down shift from 3rd. to 2nd when needed,and it will go in overdrive when it is supposed to . no lights or indicators are showing.
    Thanks for the help.
     
  4. crunch

    crunch wrench

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    Get it on a transmission capable scanner and see what is up.
    Post back any codes.

    How about the transmission oil pan?
    Any thing in the bottom of it?
    Crunch
     

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