SOURCE: fluid spec problem
FLUID TYPE: DEXRON 4 OR 6, 6 IS THE BEST AND NEWEST FLUID TYPE AND FAR SUPERIOR TO OLDER TYPE 4. DEXRON 6 PROVIDES MORE POSITIVE SHIFTS AND LONGER TRANSMISSION LIFE.
SOURCE: 2000 ISUZU TROOPER WITH AUTO TRANSMISSION. CHECK
If the fluid is up -
it could be a vacume loss or the shifting module..
The shifting module is what tells it to shift - and it is controled by vacume pressure..
SOURCE: Isuzu Trooper 1997. Automatic Transmission holds gears too long.
Their is a power and normal drive in trooper's power for pulling a trailer and normal for normal driving. The power drive only changes gear at higher R.P.M. Their is a switch on the plastic cover under the handbrake with p & n their is a light in the dash as well. If you are not aware of this switch then just needs switching over if you are aware of it then its probably the fuse to activate it or a wiring problem with it, Cheers
Testimonial: "I know the switch. But nothing changes when I switch back and forth. No light on the dashboard either. I don't know if it is in normal or power."
SOURCE: Isuzu bighorn automatic transmission slips after heating
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 )
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