issue Transmissions Issues/Problems

Crf450r420 · August 2, 2014

That never go put onto my VIN, but the transfer case going into neutral was so I got that done. It was like I reved it up and dumped into gear at random times. Happened about 5 times before I got it fixed. I was thinking maybe this was my issues. At this point I'm not sure as I just got it done. I'm about to do two 500 miles trips over the next couple weeks.

I also got my odometer flash up fixed. They said it only changed the odometer that flashes up when you open the door to check it. He then said I would lose MPG, but I thought it would fix the fact that the DIC reads .5 over what I calculate. However it still shows .5 over actual and so far it looks like I've lost about 1 MPG city. Odd thing is it reads about the same on the instant when driving, but it takes longer to recover from going down at stop lights or from drive throughs.

ToesonTheNose · August 8, 2014

dammit just found this thread. parked my 14 silverado today and hopped out and damn truck rolled away on me like it was in nuetral 1000 miles on it

14SLTZ71 · August 8, 2014

dammit just found this thread. parked my 14 silverado today and hopped out and damn truck rolled away on me like it was in nuetral 1000 miles on it

Wow..... You are the first person that I have heard of that this actually happened to. My truck went into neutral while I was pulling out of Subway, but it never rolled away when I had it in park.

ToesonTheNose · August 8, 2014

yep, worst part was my little girl opened the back door to jump out and when i shut my door she started rolling out into the road. Called the dealer today, he told me to bring it in asap so they can document and notify GM.

20L8TSierra24 · August 8, 2014

I'm thinking my noise is the front universal. Still annoying though

cluvnda1 · August 12, 2014

Please tell me knows and has had to find tcm….Mine is apparently locked and dealership says they cannot get ref lashed….any ideas

14SLTZ71 · August 12, 2014

Please tell me knows and has had to find tcm….Mine is apparently locked and dealership says they cannot get ref lashed….any ideas

Dude, what are you trying to say?

cluvnda1 · August 12, 2014

I have a t1000 it gave my tcm a bad tune and it wont accept the restore option and locked it out...diablosport wants me to pull tcm and send to them

14SLTZ71 · August 12, 2014

that may be your only choice...

20L8TSierra24 · August 12, 2014

I have a t1000 it gave my tcm a bad tune and it wont accept the restore option and locked it out...diablosport wants me to pull tcm and send to them

Ouch... Sorry to hear

cluvnda1 · August 12, 2014

Does anyone have a schematic showing exactly where its located

Craig62102 · October 26, 2014

I noticed this hard shift both accelerating and mostly decelerating at 75 miles. Brought it to the dealer and they said no codes= no problems. Now at 1900 miles the tranny or something seems confused. I step on the gas and it doesn't know what gear to engage. I get a hard clunk and it goes into gear somewhere. The deceleration bumps are very annoying. And the confusion seems it is a safety issue...

Is GM going to fix this? Or should I address it in the after market? If AM is the answer, where do I begin? I've seen some remarks about getting it tuned, I don't know what that means. What does that do? My 05 Avalanche didn't do this at all and I spent alot of money on this truck.

Any suggestions ???

2wd 1500, 5.3L, 3.42 stock.

Thanks.

14SLTZ71 · October 26, 2014

I noticed this hard shift both accelerating and mostly decelerating at 75 miles. Brought it to the dealer and they said no codes= no problems. Now at 1900 miles the tranny or something seems confused. I step on the gas and it doesn't know what gear to engage. I get a hard clunk and it goes into gear somewhere. The deceleration bumps are very annoying. And the confusion seems it is a safety issue...

Is GM going to fix this? Or should I address it in the after market? If AM is the answer, where do I begin? I've seen some remarks about getting it tuned, I don't know what that means. What does that do? My 05 Avalanche didn't do this at all and I spent alot of money on this truck.

Any suggestions ???

2wd 1500, 5.3L, 3.42 stock.

Thanks.

Go to this post. There is a PI that relates to the issues you are having.

http://www.gm-trucks.com/forums/topic/157944-transmissions-issuesproblems/?p=1467457

Craig62102 · October 27, 2014

I actually printed that and brought it to the dealer, it , so they told me applies to Mexican made transmissions, not mine made in Toledo. No codes= no problems.

Thanks for your suggestion.