Felipe Tiago
NAXJA Forum User
- Location
- Brazil, Rio Grande do Sul
Hello guys,
I have a weird problem and doing the search I found nothing similar...
My jeep is a 1998, AW4 and NP231 with 80,000 miles on it. The tansmission has been shifting really darn hard, I mean hard enough to piss me off.
The case: I start the car, step on the gas and it moves as it should, then when the RPMs reach more then 4,000 it shits from 1st to 2nd really hard and in the normal RPMs but just a bit less hard from 2nd to 3rd. For the rest of the ride it randomly shifts hard but sure it happens sometimes. The strange thing is that if I stop the jeep, turn off the engine and start it again the problem disappears and it shifts perfectly for the rest of the time.
That is, I start the car and it shifts hard sometimes during that ride but will or won't shift hard in the next time I start it, its random.
The problem is random during the day (every time a start the jeep I don't know what to expect) but always happens in the first ride of the day...
What I've already done:
- adjusted the TV clabe (tried different positions for this since it clicks twice or more, it kinda sticks);
- new TPS (I tested this new one and voltage varies smoothly but at WOT the output is only 3.8 volts);
- tested the solenoids: all around 14 ohms in the TCM harnnes and in the plug near the firewall in engine bay;
- cleaned the ground connectors G102 and G100;
- a shop changed the transmission fluid and filter (level is ok and there were no metal particles in the old fluid neither in the pan);
- the last try was having the valve body cleaned (the shop didn't charge me for this because they said it didn't solve the problem, which I thought weird... they also said there were visible issue with the valve body).
So, what do you guys think that could change in the transmission when I turn off the car and start it again to make the problem go away?
Sorry for the long post!
I have a weird problem and doing the search I found nothing similar...
My jeep is a 1998, AW4 and NP231 with 80,000 miles on it. The tansmission has been shifting really darn hard, I mean hard enough to piss me off.
The case: I start the car, step on the gas and it moves as it should, then when the RPMs reach more then 4,000 it shits from 1st to 2nd really hard and in the normal RPMs but just a bit less hard from 2nd to 3rd. For the rest of the ride it randomly shifts hard but sure it happens sometimes. The strange thing is that if I stop the jeep, turn off the engine and start it again the problem disappears and it shifts perfectly for the rest of the time.
That is, I start the car and it shifts hard sometimes during that ride but will or won't shift hard in the next time I start it, its random.
The problem is random during the day (every time a start the jeep I don't know what to expect) but always happens in the first ride of the day...
What I've already done:
- adjusted the TV clabe (tried different positions for this since it clicks twice or more, it kinda sticks);
- new TPS (I tested this new one and voltage varies smoothly but at WOT the output is only 3.8 volts);
- tested the solenoids: all around 14 ohms in the TCM harnnes and in the plug near the firewall in engine bay;
- cleaned the ground connectors G102 and G100;
- a shop changed the transmission fluid and filter (level is ok and there were no metal particles in the old fluid neither in the pan);
- the last try was having the valve body cleaned (the shop didn't charge me for this because they said it didn't solve the problem, which I thought weird... they also said there were visible issue with the valve body).
So, what do you guys think that could change in the transmission when I turn off the car and start it again to make the problem go away?
Sorry for the long post!