Tranny all of a sudden stopped upshifting.
05-21-2016, 09:27 PM
#1
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Tranny all of a sudden stopped upshifting.
All I did was spray some carb and throttlebody cleaner and replaced the idol control sensor on throttle body and went for a ride and tranny wont upshift now. Please help anyone, I need to move back to Mich. in a few days and don't want to leave our Jeep behind. If someone can help me figure out this mess, I will pay for the help. Thanks
05-22-2016, 05:49 AM
#3
Beach Bum
I thought that carburetor cleaner can damage sensors. Only to use throttle body cleaner.
Make sure the transmission cable did not disconnect from throttle body or become mis-adjusted, it is involved in shift control.
Make sure the transmission cable did not disconnect from throttle body or become mis-adjusted, it is involved in shift control.
01-07-2018, 04:41 AM
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Im having an upshift issue too I had the radiator replaced on 8/11/17 the on 17/11/17 transmission would not upshift took my foot off the gas and it dropped into gear and hasn't been an issue really since until yesterday it stopped up shifting all together unless you get to 3000 rpm and take your foot off the gas
cleaned the iac and cleaned all the crap out from under the car to see of any possible trans leaks still no joy in This issue being fixed
i took it for a drive down the road tonight but the gears still won't change not even from 1st to 2nd unless I put the revs right up to 3000 rpm and take my foot off the gas
could it be the tv cable? It seems to have a little play in it but not much I'm at a loss please help me what else could it be should I adjust the to cable? Or just take it to a transmission mechanic
can I manually change the gears from 1,2,3 and the drive as it seems to down shift fine juts not upshift
cleaned the iac and cleaned all the crap out from under the car to see of any possible trans leaks still no joy in This issue being fixed
i took it for a drive down the road tonight but the gears still won't change not even from 1st to 2nd unless I put the revs right up to 3000 rpm and take my foot off the gas
could it be the tv cable? It seems to have a little play in it but not much I'm at a loss please help me what else could it be should I adjust the to cable? Or just take it to a transmission mechanic
can I manually change the gears from 1,2,3 and the drive as it seems to down shift fine juts not upshift
01-07-2018, 05:56 AM
#5
Beach Bum
^ Did you check the fluid level? Replacing the radiator will cause a loss of some of the transmission fluid.
01-07-2018, 08:46 AM
#6
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Cherieb, yes you can manually change gears, but if you haven't noticed yet, you do lose 2nd gear. i had to run 1st up in the revs before i shifted, then it skipped 2nd and went right to 3rd. not sure if yours will do the same.
but i second the TPS sensor, when mine was doing this as it was when i purchased it, i drove it like that for 3 years before swapping the trans (another problem - burnt out the torque converter seal) and it still didn't fix the shifting issue.
then i asked on here, and someone told me the TPS, so i swapped that out and what do you know, shifting great from then on.
but i second the TPS sensor, when mine was doing this as it was when i purchased it, i drove it like that for 3 years before swapping the trans (another problem - burnt out the torque converter seal) and it still didn't fix the shifting issue.
then i asked on here, and someone told me the TPS, so i swapped that out and what do you know, shifting great from then on.
01-07-2018, 02:36 PM
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Yes I've checked the fluid level on a number of occasions after I've run it short and long distances and just from sitting over night I've warmed it to running temp gone through the gears a handful of times and still shows as ok maybe o should just add some and see what happens or change out the tos and see what happens
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01-07-2018, 08:41 PM
#8
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Yes I've checked the fluid level on a number of occasions after I've run it short and long distances and just from sitting over night I've warmed it to running temp gone through the gears a handful of times and still shows as ok maybe o should just add some and see what happens or change out the tos and see what happens
Does it look light brown like your engine oil when it's getting close to time to change it? Or is it really dark or even black?
01-07-2018, 09:41 PM
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We just dropped the trans pan to do a fluid and filter change looks like it's never been done since it was built still has the original plastic seal that still in good condition the oil is dark brown almost black has some really small metal shavings in it around barely a 1/3 teaspoon so we're waiting for it to drain so we can put new filter and fluid in it and see how she runs
i took it for a drive this morning and tested if I manually change the gears will it upshift and it does as long as the revs are right at around 2000 rpm so that's something at least
the jeep specialist in brissy said that he thinks it's the fluid or the valve packs or solarnoids if the fluid change doesn't fix it will Le t you know what happens when it's all back together
i took it for a drive this morning and tested if I manually change the gears will it upshift and it does as long as the revs are right at around 2000 rpm so that's something at least
the jeep specialist in brissy said that he thinks it's the fluid or the valve packs or solarnoids if the fluid change doesn't fix it will Le t you know what happens when it's all back together
01-07-2018, 09:50 PM
#10
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We just dropped the trans pan to do a fluid and filter change looks like it's never been done since it was built still has the original plastic seal that still in good condition the oil is dark brown almost black has some really small metal shavings in it around barely a 1/3 teaspoon so we're waiting for it to drain so we can put new filter and fluid in it and see how she runs
i took it for a drive this morning and tested if I manually change the gears will it upshift and it does as long as the revs are right at around 2000 rpm so that's something at least
the jeep specialist in brissy said that he thinks it's the fluid or the valve packs or solarnoids if the fluid change doesn't fix it will Le t you know what happens when it's all back together
i took it for a drive this morning and tested if I manually change the gears will it upshift and it does as long as the revs are right at around 2000 rpm so that's something at least
the jeep specialist in brissy said that he thinks it's the fluid or the valve packs or solarnoids if the fluid change doesn't fix it will Le t you know what happens when it's all back together
And in Brissy you say?
Small(ish) world... I just moved to the US from living in Adelaide down south of you.
01-07-2018, 10:14 PM
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Ha yes it is a small world yes it was tyres and more at Capalaba in Brisbane they specialise in all jeeps
thanks for the advise about the drain and fill I was wondering about the flush but people have said the same thing that after they flush it they have big problems
I'm hoping and praying lol that this is the issue and it's fixed I love my jeep but have spent close to $3500 in the last 5mth so would be nice to have a win lol
thanks for the advise about the drain and fill I was wondering about the flush but people have said the same thing that after they flush it they have big problems
I'm hoping and praying lol that this is the issue and it's fixed I love my jeep but have spent close to $3500 in the last 5mth so would be nice to have a win lol
01-08-2018, 09:03 PM
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So I dropped the trans fluid and replaced the filter and fluid the Haynes manual said it would take 4 quarts but looks like I'll need about 5 or 6 cause it's still under the min line on the dips stick I took it out to go through the gears and still won't upshift automatically I pulled over put it in 1st started again it will manually change from 1 to 2 but when I put it in drive it won't change to 3rd or overdrive
I will top the fluid up when I can get to an auto store but in the mean time what else could it be as I have a feeling changing the fluids not going to fix this issue
I will top the fluid up when I can get to an auto store but in the mean time what else could it be as I have a feeling changing the fluids not going to fix this issue
01-08-2018, 09:27 PM
#13
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Also what was mentioned with TPS is very easy to check. Does your ZJ have the I6 4.0? On the configuration in the XJ it is right behind the thottlebody/intake towards the firewall.
If I may make a small suggestion... for future reference, when you are in need of assistance on one primary issue, it's easier for people to help when you keep it confined to a single thread instead of starting multiple ones for the same issue. That way all of the assistance can be tracked by others to know what has been suggested and tried, etc.
The TPS is very easy to change....but I would look at the other things that have been mentioned as well. On Jeeps it's not always "one issue, one symptom/single cause". In this case with yours, there really are several things that can result in the issue you are experiencing. Just be systematic in your approach and you'll find the problem.
Also if you ran too long on low fluid that could result in internal issues....but if it were that low, I would also expect to see fluid that was in there to be pretty burnt, and a good amount of shavings from the clutch packs, and from what you described, it doesn't sound like that is what you had.
If I may make a small suggestion... for future reference, when you are in need of assistance on one primary issue, it's easier for people to help when you keep it confined to a single thread instead of starting multiple ones for the same issue.
That way all of the assistance can be tracked by others to know what has been suggested and tried, etc.The TPS is very easy to change....but I would look at the other things that have been mentioned as well. On Jeeps it's not always "one issue, one symptom/single cause". In this case with yours, there really are several things that can result in the issue you are experiencing. Just be systematic in your approach and you'll find the problem.
Also if you ran too long on low fluid that could result in internal issues....but if it were that low, I would also expect to see fluid that was in there to be pretty burnt, and a good amount of shavings from the clutch packs, and from what you described, it doesn't sound like that is what you had.
Last edited by RocketMouse; 01-08-2018 at 09:32 PM.
01-08-2018, 09:44 PM
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Thanks for the advise I will try to keep it to one thread sorry 🙂
The fluid was a really dark brown almost like coffee colour but was not smelly and didn't smell burnt there was some metal shavings but they were small and very fine and would barely take up a 1/3 of a teaspoon
when it it first happened I took it straight to a mechanic and he said it was my brakes as at the time I wasn't sure if it was the trans or brakesnit happened so fast and went just as suddenly and didn't do it again but I did notice that the revs had started to get up to 2500 before it would change the it just happened last sat drove to the local shops fine and then when I went to leave it wouldn't up shift
I'll check the fuse and I'll check the tps and hopefully it's one of those but I have a horrible feeling it's not and I'm going to be looking at a rebuild
The fluid was a really dark brown almost like coffee colour but was not smelly and didn't smell burnt there was some metal shavings but they were small and very fine and would barely take up a 1/3 of a teaspoon
when it it first happened I took it straight to a mechanic and he said it was my brakes as at the time I wasn't sure if it was the trans or brakesnit happened so fast and went just as suddenly and didn't do it again but I did notice that the revs had started to get up to 2500 before it would change the it just happened last sat drove to the local shops fine and then when I went to leave it wouldn't up shift
I'll check the fuse and I'll check the tps and hopefully it's one of those but I have a horrible feeling it's not and I'm going to be looking at a rebuild
01-08-2018, 09:59 PM
#15
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Thanks for the advise I will try to keep it to one thread sorry ��
The fluid was a really dark brown almost like coffee colour but was not smelly and didn't smell burnt there was some metal shavings but they were small and very fine and would barely take up a 1/3 of a teaspoon
when it it first happened I took it straight to a mechanic and he said it was my brakes as at the time I wasn't sure if it was the trans or brakesnit happened so fast and went just as suddenly and didn't do it again but I did notice that the revs had started to get up to 2500 before it would change the it just happened last sat drove to the local shops fine and then when I went to leave it wouldn't up shift
I'll check the fuse and I'll check the tps and hopefully it's one of those but I have a horrible feeling it's not and I'm going to be looking at a rebuild
The fluid was a really dark brown almost like coffee colour but was not smelly and didn't smell burnt there was some metal shavings but they were small and very fine and would barely take up a 1/3 of a teaspoon
when it it first happened I took it straight to a mechanic and he said it was my brakes as at the time I wasn't sure if it was the trans or brakesnit happened so fast and went just as suddenly and didn't do it again but I did notice that the revs had started to get up to 2500 before it would change the it just happened last sat drove to the local shops fine and then when I went to leave it wouldn't up shift
I'll check the fuse and I'll check the tps and hopefully it's one of those but I have a horrible feeling it's not and I'm going to be looking at a rebuild
This image is a representation as to what is similar to yours... So you can better understand what I'm referring to......
Last edited by RocketMouse; 01-08-2018 at 10:01 PM.