I have a 98 GC with the 5.2V8 limited and 151K miles. I beleive the transmission is the 42re. I went out the other day and it would not shift out of 1st gear. I did manage to get it to do it a few times.
If i would rev it up pretty high and take my foot off of the gas it shifted but only a few times. Then sometimes i could get it to shift up a gear of i did the same thing but kick it is neutral and back into drive.
The fluid and filter was changed a year ago... COuld it be the band needs adjusted?
i believe you have the 44re, i think the 42res come with the 4.0l. the bands may need adjusting. I know there are pressure switches which determine when a gear change is needed. Maybe one of these have failed.
edit: i have the FSM at home for this tranny, i can look up ideas later
alright thank you... it has been about 2 years since the flush and then shortly after the flush i had to replace the tranny pan bc of rust so it had new fluid it in again. But when it shifted it was fine. No slipping or hesitation. Just one morning it wouldn't shift out of first. Just got it to do it a few times.
There is also a speed sensor that is at the drivers side rear of the trans, on the o/d extension housing. Usually when this sensor fails it will stay in 1st and not upshift. This sensor influences the PCM to determine governor pressure. It could be the governor pressure sensor and solenoid too though. I would check it for codes though because either issue usually sets a code.
Yes best bet turn your key three times and manually pull your trans code by counting the flashes of the o/d switch on dash
That only works with the 93-95 models. You need a code reader for the 96-98. If the gov pressure sensor and solenoid are going bad it may or may not throw a code. Mine threw a code then went away without clearing it. I have the parts on order. You can take it to an auto parts store and they may have a code reader for free. Oreily's had one. I just gave them my I.D. while I used it.
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