Second gear grinding & remedy

[$ub$onic]

Is this a widely recommended product

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[StrictlyCustom]

I was sure to tell my dealer a "replaced transmission 6xx miles" was unacceptable on my Carfax report and wanted a different car if that's what needed to be done.

 

[nocoolnames]

I was sure to tell my dealer a "replaced transmission 6xx miles" was unacceptable on my Carfax report and wanted a different car if that's what needed to be done.

Would something like that appear on the carfax? I thought it was just accidents and such not service.

 

[nocoolnames]

Doesn't adding redline void the warranty

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It shouldn't void the warranty but to make sure if you have a dealer document and install the new fluid for you then your defiantly covered for warranty.

 

[cndctrdj]

i have ground 2nd gear twice now in 900 miles... so i have to bring this back. never had this problem with my cobalt in 78k miles so i know its the trany.

does the bulliten work on 2013 models?

 

[StrictlyCustom]

Would something like that appear on the carfax? I thought it was just accidents and such not service.

It shows service records which in my opinion would take away from the value. Of course I don't plan on selling it, but everything has a price.

 

[SSpeckerwood]

I've changed to the Redline and have done countless NLS and still haven't ground 2nd gear

 

[StrictlyCustom]

I've changed to the Redline and have done countless NLS and still haven't ground 2nd gear

Your car may not have been affected. If something is out if adjustment, as the tsb claims, I don't see how a heavier fluid would fix the issue. Yes I do plan on upgrading my fluid but you should have that "adjustment" done as well. I took my car in for the washer fluid recall and found out my model isn't affected. Not all sonics have the 1-2 grind that is why my dealer did more searching into my issue after driving another on the lot.

 

[B-radly81]

Your car may not have been affected. If something is out if adjustment, as the tsb claims, I don't see how a heavier fluid would fix the issue. Yes I do plan on upgrading my fluid but you should have that "adjustment" done as well. I took my car in for the washer fluid recall and found out my model isn't affected. Not all sonics have the 1-2 grind that is why my dealer did more searching into my issue after driving another on the lot.

I had the very aame problem anytime I shifted above 5 k rpm it would grind changed my fluid to redline mt 90 and I can no lift shift all day long with no grind

 

[Foxbox]

Mine randomly grinds, I don't quite understand it really. It was bad before mt90, like any quickness above 5k was a grind.

After mt90 it's much better but will still grind sometimes. Example, I just went out driving shifted quickly four times into second above 5k and grind two out of four times. I did one NLS and it was buttery smooth, makes zero sense to me.

For the record it has done this since day one with 80 miles on it. It now only has 1700 miles, I'll prolly take it in soon to have the dealer try and figure something out.

 

[SSpeckerwood]

Your car may not have been affected. If something is out if adjustment, as the tsb claims, I don't see how a heavier fluid would fix the issue. Yes I do plan on upgrading my fluid but you should have that "adjustment" done as well. I took my car in for the washer fluid recall and found out my model isn't affected. Not all sonics have the 1-2 grind that is why my dealer did more searching into my issue after driving another on the lot.

I don't see why you're protesting what I've tried and know to be true. Try the fluid, then when it doesn't grind I'll accept an apology in this thread or via PM.

 

[Foxbox]

I don't see why you're protesting what I've tried and know to be true. Try the fluid, then when it doesn't grind I'll accept an apology in this thread or via PM.

Changing the fluid is not a for sure fix. It helps but doesn't solve the issue.

 

[SSpeckerwood]

It has for me. Economy clutch, I repeat, economy clutch!

 

[Chevrolet Customer Care]

I have taken note of the grinding issues for GM. Please DM us if the car is not satisfactorily being serviced by the dealership with you VIN#, contact information, and situation. I hope all is going well despite the car issues.

Matt,

GM Customer Assistance

 

[sonic hotness]

Sounds awesome matt,

My car has 8,500k and I have grinded twice now

 

[mitdr774]

I dont wind mine up enough to get the grind that often. I know it does it, just not annoyed enough to take it in yet. 13k miles and its been there since the first quick 1-2 shift above about 4k RPM. I will probably just change the fluid and some point down the road when the trans tells me to go screw off I will look into putting a 6 speed in it.

 

[B-radly81]

its a European transmission gm put a thinner fluid in it to gain 1 to 2 mpg and gm is the only ones to put the thinner fluid Im sure if you lived where it was below freezing all the time the thinner fluid would work fine the makers of the transmission reccomend the thicker fluid

 

[$ub$onic]

A lot of there other mt s run atf fluid

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[mitdr774]

The Isuzu in my 98 Z24 and the NVG 3500 in my K1500 use Synchromesh. The Getrag in my 02 Z24 uses ATF. It all depends on what the trans was designed to use. The transmission in our cars has worked just fine in other countries for many years, and now it has an issue here??? I suspect that the thinner fluid for CAFE reasons is the issue.

 

[Black Turbo LTZ]

I have taken note of the grinding issues for GM. Please DM us if the car is not satisfactorily being serviced by the dealership with you VIN#, contact information, and situation. I hope all is going well despite the car issues.

Matt,

GM Customer Assistance

Matt, I sent an email to my service manager for an appointment since I to have this issue.