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98 GC transmission shifting problem

14K views 44 replies 18 participants last post by  Bolo913 
#1 ·
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?

Any help please

Thanks,
Darrell
 
#4 ·
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
 
#5 ·
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.
 
#8 ·
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.
 
#27 ·
I'm glad your transmission is working as it should! Could this issue also affect a 46RE? As Melk saw this morning, I am looking to pick up a 5.9L Limited soon that is shifting a little funny. The service history is unknown so I am trying to generate a list of parts to replace (ie: TPS) or upgrade (cooler) as well as flush the system...
 
#28 ·
Could this issue also affect a 46RE? As Melk saw this morning, I am looking to pick up a 5.9L Limited soon that is shifting a little funny.
I bought a 5.9 that would only go in first and reverse. I was hoping that it was the governor pressure sensor/solenoid. It ended up being the transmission speed sensor. Even better because I didn't have to drop the pan. It shifts great now. So it could be a possibility with the 46RE.
 
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