Auto trans shift times

[sonic1067]

What kind of other problems ?

 

[sonic1067]

Thanks I saw that to - My car winds out so bad going up hills and gets stuck and won't shift - the computer was put on today and I hit the silly button 3 times. Then realized it only records 4 times

 

[jpierro79]

earlier he said that changing the fluid and putting it at the right level fixed the tranny issue. but thats his car. im still gonna try it & see what happens. i want to run synthetic anyways.

Just be careful about synthetics. Sometimes they are too slick and cause problems.

 

[jpierro79]

Thanks I saw that to - My car winds out so bad going up hills and gets stuck and won't shift - the computer was put on today and I hit the silly button 3 times. Then realized it only records 4 times[/QUOT

Mine used to get stuck in 5th I would either manual shift it or give it enough throttle to downshift then release and it would go into 6th

 

[td11pump]

Hello All! I had 1998 miles on my Sonic 2LT sedan and the traction control light came on and the car would over rev and then bang into 3rd gear and then go to 4-5-6 gear. I immediately called Chevy and they told me to take the car to my nearest Chevy dealer and have the problem taken care of. I took the car to New Rochelle Chevy in New Rochelle, New York. I have taken my Chevy's to them because I have bought 2 cars from them when they were Soundview Chevy. Same dealership under a different owner, I think.
I trust the service advisers and the mechanics that work there. Mark, my service adviser, took the car in and I told Mark the problem. I said take your time and get it right, and he said we'll go through everything to make it right!
These are the results

Customer states the transmission hangs up in 2nd gear and bangs into 3rd gear-then jumps to 4-5-6
Customer states trans delays when put into reverse and bangs.
Traction Off light came on when symptoms occur
Road test vehicle- Shifting normal
Checked for trouble codes in trans and engine
No codes in any modules
Checked transmission fluid- Found overfilled by 1 Qt.
Drained transmission fluid- filled to proper level
Checked for any updates- no transmission updates or engine updates, update ECM for driveability issues
Road-tested vehicle again-Vehicle shifted normal. Operating as designed at this time- ECM code 1841E

The car shifts fine now!

 

[sonic1067]

How did you get it fixed -- I can do the same thing but then my engine sounds like it wants to die --

Did you find that yours only did it once the car warmed up - I get up in the morning and go to work and no problems.. After the car is driven about 15-20 min is when all the problems start -- and the first time I had a major problem it was about 85 degrees here for the first time since I bought it ?

 

[jpierro79]

Hello All! I had 1998 miles on my Sonic 2LT sedan and the traction control light came on and the car would over rev and then bang into 3rd gear and then go to 4-5-6 gear. I immediately called Chevy and they told me to take the car to my nearest Chevy dealer and have the problem taken care of. I took the car to New Rochelle Chevy in New Rochelle, New York. I have taken my Chevy's to them because I have bought 2 cars from them when they were Soundview Chevy. Same dealership under a different owner, I think.
I trust the service advisers and the mechanics that work there. Mark, my service adviser, took the car in and I told Mark the problem. I said take your time and get it right, and he said we'll go through everything to make it right!
These are the results

Customer states the transmission hangs up in 2nd gear and bangs into 3rd gear-then jumps to 4-5-6
Customer states trans delays when put into reverse and bangs.
Traction Off light came on when symptoms occur
Road test vehicle- Shifting normal
Checked for trouble codes in trans and engine
No codes in any modules
Checked transmission fluid- Found overfilled by 1 Qt.
Drained transmission fluid- filled to proper level
Checked for any updates- no transmission updates or engine updates, update ECM for driveability issues
Road-tested vehicle again-Vehicle shifted normal. Operating as designed at this time- ECM code 1841E

The car shifts fine now!

I believe my original statement for this section of the forum holds true. There is also possibility that my fluid was being ruined because it was over filled and caused my fluid discoloration. What occurs is a sort of foaming of the fluid causing lack of pressure in the valve body causing shift errors. High trans temps ect. Most shift issues were when warm because the fluid level is raised inside the transmission when warm. My Production date of my vehicle was 9 2011. Curious if it is a common issue for this production date. Would make sense because colder time of year and accordance to the procedure the fluid has to be between 185f and 195f in order to fill to proper level. I still had mild shift issues after I corrected my fluid level but not as bad as before I did. Hence the reason I ran fresh fluid through mine. I also was 5k into driving mine not 2k. I think the transmission is a good solid design but silly mistake made here. Too many hands in the cookie jar maybe. Who knows but I am grateful mine was not a design flaw.




UPDATE I BOUGHT THE TURBO STICK. NO MORE RED 1.8 AUTO.

 

[sonic1067]

Let me turn the tables, where's the proof it works? So he changed his fluid. Claims it shifts better? Zero data or analysis that the fluid is actually bad. (Realize clutches will defuzz which will darken the fluid, in addition to heat cycling.) Gut feeling is it shifts better? Like I picked up 20hp with a carb spacer plate (measurement via butt dyno)? Perceptions are a funny thing. Doesn't mean I'm calling anyone less than smart. Sure he's a tech. Great. He's got knowledge of other products. Doesn't mean he's an expert with this particular product. This isn't your mom's 4 spd or grandfathers 3 spd.





Where's the proof the fluid was bad?


Bigger questions is, the car is under warranty, why wouldn't you take it in? Take the service manager for a ride to demonstrate it. Specifics of the actions you're taking to induce the condition are critical. People drive differently. Different routes, grades, speeds, etc.

So what do you do when the dealer and GM state they can not duplicate the issues even when you take them for a ride and show them and they feel the shift problems. I have asked the dealer to check the trany fluid and they said they are waiting to hear what to do from GM after the computer thing comes off my car on Wednesday and we get the results .. Today my car wouldn't shift for more than the 30 sec snap shot the computer takes ..

 

[jpierro79]

So what do you do when the dealer and GM state they can not duplicate the issues even when you take them for a ride and show them and they feel the shift problems. I have asked the dealer to check the trany fluid and they said they are waiting to hear what to do from GM after the computer thing comes off my car on Wednesday and we get the results .. Today my car wouldn't shift for more than the 30 sec snap shot the computer takes ..

If your problems occur when trans gets warm this would indicate that you are having the same issues of an overfilled trans. It does not guarantee that this is your issue. Only a matching symptom to some individuals. You should tell them they need to drive the car for a long period of time allowing the transmission to come up to complete operating temp. If that is when your issues occur. Sometimes it gets very frustrating. I understand. As a technician myself I try to ask more questions about the situation directly to the customer if I can not duplicate an issue. They want to help so that is good. If I was a GM rep I would honestly try to contact your dealer because if you read an earlier post that another individual had same problems or similar and it was as mine was, overfilled. Less miles though. I hope in some way I have been helpful to you.

 

[Bogus]

So today i took my car to get my tranny fluid changed out to see if it would fix my shifting problems. And just as jpierro79 said, IT WORKED.

 

[Inferno1.8]

What's the procedure to check the fluid? Mine is starting to bang harder into reverse. I put it in gear give it some gas, car rolls back a few feet and then it hits hard into reverse. If I don't give it gas on an incline I get a about a 2 foot roll backwards until it hits reverse.

 

[Bogus]

What's the procedure to check the fluid? Mine is starting to bang harder into reverse. I put it in gear give it some gas, car rolls back a few feet and then it hits hard into reverse. If I don't give it gas on an incline I get a about a 2 foot roll backwards until it hits reverse.

wow mine kicks a little if im on the gas but not that bad. i just went to jiffy lube and told them it was overfilled and to dump it out and put new oil in. i got the chevy certified oil.

 

[jpierro79]

wow mine kicks a little if im on the gas but not that bad. i just went to jiffy lube and told them it was overfilled and to dump it out and put new oil in. i got the chevy certified oil.

Your shifts might become firmer for sure. That is actually normal for this trans. It doesn't use bands like other transmissions do.

 

[Bogus]

Your shifts might become firmer for sure. That is actually normal for this trans. It doesn't use bands like other transmissions do.

yes shifts are definitely firmer and quicker. less lag between gears. although it does still happen at red lights sometimes. not as bad as before though.

 

[GM_6T40_Trans_Engineer]

wow mine kicks a little if im on the gas but not that bad. i just went to jiffy lube and told them it was overfilled and to dump it out and put new oil in. i got the chevy certified oil.

Jiffy lube? Like a Jiffy Lube of all places is going to get it right. They barely can get your oil changed, let alone do a transmission. Take your car into the dealer and have them set it before you burn it up.


My money is, it won't be long until you're into the dealer because it won't shift in to any gear higher than 3rd. opcorn:


The internet kills me. I should start marketing a glitter shift additive.

 

[td11pump]

sonic1067, the car did this when it was warmed up, engine running for 10 min. After the fluid change and refill its fine.:banana:

 

[Bogus]

GM_6T40_Trans_Engineer: yeah im sure it'll be just fine. come back when you get your panties out of your ass.

 

[jpierro79]

GM_6T40_Trans_Engineer: yeah im sure it'll be just fine. come back when you get your panties out of your ass.

I certainly dont agree with gm 6t's attitude but jiffy lube is definitely not the first place I would have taken it.

 

[jpierro79]

What's the procedure to check the fluid? Mine is starting to bang harder into reverse. I put it in gear give it some gas, car rolls back a few feet and then it hits hard into reverse. If I don't give it gas on an incline I get a about a 2 foot roll backwards until it hits reverse.

Read the first post in this forum.

 

[Bogus]

I certainly dont agree with gm 6t's attitude but jiffy lube is definitely not the first place I would have taken it.

Where would you recommend? I watched them do my tranny, the guy just hooked up some hoses from a pump to my car and let it do the work. So I dont really see a margin for error. I could be wrong though.