Results 1 to 6 of 6

stumbling...

This is a discussion on stumbling... within the Automatic Transmission forums, part of the Drivetrain category; hey all, well i have noticed this problem before but it is either gettin a little bit worse or its ...

  1. #1
    Member pewterz55's Avatar
    Join Date
    Jul 2009
    Location
    chicago
    Posts
    502

    light pewter metallic
    1999 z28

    stumbling...

    hey all,
    well i have noticed this problem before but it is either gettin a little bit worse or its bugging me more so i notice it every time.
    - well to start im pretty sure this only happens when the car is up to normal operating temp but again maybe i just dont notice it on shorter drives.
    -1) when im driving on the highway say 65, when i get off the gas it seems my transmission is struggling a bit to down shift. but right when i get back on the gas it gets into gear and smooth as can be. the problem only seems to be when im coasting/slowing down. (the car shifts hard and clean at WOT)
    -2) seems the the second part could be realted. when comnig to a complete stop, ill be coasting and the trans doing its usual stumbling and the right before im about to completely stop it gives one last jerk forward.

    any ideas what this could be guys? id really like to start modding my car but i want it to be running 100% before i start throwing money at it
    so to isolate and see if it was the tranny i tried putting it in neutral a couple times when stopping and whiel coasting on the highway. In N the car rolls to a complete, smooth stop with no jerks or funky movements.
    also the car seems to move a bit slow while changing from park, reverse, and to drive and jerks the whole car .
    Last edited by pewterz55; 03-29-2011 at 08:21 AM.

  2. #2
    Junior Member
    Join Date
    Apr 2007
    Location
    denton,Texas
    Posts
    27

    hello

    Not enough info can we start by getting the upshift speeds say normal throttle,,at what speed does the 1-2 come in at, then the 2-3,and finally the 3-4?? Then try it in drive at normal throttle, 1-2, then the 2-3?? another concern is when does lock up happen? at what speed in overdrive? From your discription it may be a lock up issue. Down shifts are weird to begin with, has anyone ever tuned this car? I hope this helps Dave

  3. #3
    Member pewterz55's Avatar
    Join Date
    Jul 2009
    Location
    chicago
    Posts
    502

    light pewter metallic
    1999 z28

    im not sure ecactly what mph or rpms the car shifts on normal throttle or WOT ill have to look into to that next time i have the car out.

  4. #4
    Junior Member
    Join Date
    Apr 2007
    Location
    denton,Texas
    Posts
    27
    RPM's don't matter, don't need WOT either, just the up shifts. Hope this helps Dave

  5. #5
    Junior Member STL2SLO's Avatar
    Join Date
    Feb 2008
    Location
    Wisconsin
    Age
    41
    Posts
    44

    White
    1998 Camaro

    With the little info you posted I would guess its a tcc issue as well.

  6. #6
    Member pewterz55's Avatar
    Join Date
    Jul 2009
    Location
    chicago
    Posts
    502

    light pewter metallic
    1999 z28

    I havent had the car out yet but from what I've been reseaching it seems like it could be the converter having lock up problems. which I wouldn't mind so I can upgrade

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: Lt1/t56 stumbling under load
    By blank94z28 in forum LT1
    Replies: 8
    Last Post: 05-04-2012, 06:44 AM
  2. o2 voltage? stumbling
    By sl0z28 in forum General Help
    Replies: 10
    Last Post: 12-13-2011, 06:16 AM
  3. Engine stumbling and sluggish
    By Rhinohuey in forum General Help
    Replies: 5
    Last Post: 09-12-2009, 03:34 PM
  4. 02 Sensors Car Stumbling
    By 94redmaro in forum LT1
    Replies: 2
    Last Post: 05-31-2007, 08:44 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •