Sounds to me that your transmission is put itself into what is call (Limp Mode). This happens when the transmission fluid in the trans hydraulic valve body located on the bottom and in the trans pan are not within the parameters of the transmission computer. You can remove the trans pan and gasket to check for metallic material in the bottom of the pan. There is normally a strong magnet in the pan catch the material so I can't move freely through the transmission itself. It only takes a very small piece of foreign material to stop the flow of the valve body fluid. I would first take it to somewhere that had a automotive diagnostic scan tool that can read transmission codes to see if there are any active codes. Next you can drop the transmission pan yourself and look for material in it. Basically do a visually inspection and service the transmission fluid, gasket, and filter. Remember, all a automatic transmission is a extremely complicated fluid pump. If its pumping trans fluid properly it's probably working just fine. Been when the trans fluid gets hot, scorched, and stops moving. It will not work. Hope this helps
SOURCE: Out of nowhere 1998 Isuzu
This is caused by one of two things, the most common is that the fluid is low, with the engine running chek the fluid level and add as needed, if the fluid is full then i would say the ****** needs rebuilding and this is costly but first check the fluid level, low fluid can cause damage to ****** due to lack of lubrication. good day,
SOURCE: I have an automatic Isuzu trooper 1996, it shifts wrong
You need to get the transmission serviced. Either the Filter is clogged or something has worn out and needs to be repaired.
SOURCE: 1994 isuzu trooper 3.2 dohc automatic will not
The 3rd clutch pack is very cheezy on this unit (4L30E). The 3 speed version of your trans was used in the Chevy Chevett back in the late 70's early 80's (GM's THM 180). Check the oil condition for a burnt smell. Other items to check are speed sensory, and the shift soleniod (I don't know what the codes translate to). Any issues with reverse? If you'll drop the pan of the trans you may find debris. In this case it very well may be internal damage (clutch pack for example). Don't bother with changing the filter or adding additives to solve this problem.<br /> RTB - ProBuilt
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