Hi guys I have a 98 Trooper V6 auto, the fault started with the gearbox making a clunk only between second and third gear, also found that the selector lights on the dash were jumping all over the place. When held in first gear manually the car still shifted to second. All these faults werent always there, if it was doing it and I turned off the ignition and restarted the car car it would most of the time go away. I changed the gearbox oil and filter and it was fine until about 60 miles later it all returned, same thing on and off, some forums may indicate a faulty mode sensor, whatever that is. Any advice would be greatly appreciated as I love my zoo, I have also pulled some connections off the gearbox and cleaned them with contact cleaner but that didnt help.
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I can explain the sluggishness you get after the fault occurs and the light appears. The rodeo will go into what's called 'limp home mode' when it detects a fault. It is a safety feature that locks the car in second (or third) gear so u can get home or to the mechanic...slowly. If you turn the car off and re-start it will re-set. I recently was having transmission problems with my 2002 v6. It would occasionally clunk badly when pulling up to a slow stop. Intermittent problem that I couldn't reproduce with the mechanic (of course). They changed the transmission oil which was low and old, not a cheap job but probably a good idea. Unfortunately problem was still there. Plug in diagnostic module at transmission specialist showed no current faults when they first checked it, but a look through the fault history when I took it back and told them problem was still there showed a fault with the TPS or Throttle Position Sensor. Replaced that (not very expensive) and its been perfect ever since. May not be your problem, but get the transmission guy to check fault history, not just current faults. Don't know why my guy didn't do it the first time. Best of luck
I may have a similar issue, it's hard to tell from your description. My transmission is in 'limp' mode with a fault light on the dashboard. It basically causes the transmission to lock into third gear. Acceleration is poor because you are starting out in third gear. I'll let you know if I sort it out. It could be the switch on the brake pedal. Others have had luck switching that out
I replaced the autohubs on my 90 trooper with a set from Warn. $180 and 2 hours. You might want to check the U-joints on the output shaft for the Front Diff. they can make lots of noise when they go bad.
After a jump start because of no electrical power, the car will run rough for several days (expected) while it adjusts to your driving habits. I'm not sure about the gears, but I'd try to drive with it like that for a few days and see if it returns to normal.