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2014 6.2L 6 speed Trans shifting issues. Slow Sloppy 1-2 shift

midwestdave33

By midwestdave33
in Troubleshooting & Recalls

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midwestdave33 Enthusiast

midwestdave33

Posted
Posted

Ok, I apologize if this was covered in depth somewhere else but after several searches of the forum I have found no clear answers. So here goes:

 

I have a 2014 Silverado LTZ with a 6.2L and a 6 speed transmission, 3.42 rear gear ration and stock height tires.

Im experiencing these issues:

 

1. Slow, sloppy 1-2 WOT shift. It takes so long the engine hits the rev limiter in between shifts and I can tell it does because I have a Borla Atak exhaust on the truck so I hear all the tones that the sock exhaust would normally hide. I want my 1-2 to be lightning quick and firm enough to break the tires loose at WOT. There has to be a way to get this thing to clean up/speed up its shifting.

 

1b. Another problem with the slow shift is when i'm doing any kind of performance driving with the traction control OFF. I'll go to launch with the intention of doing a burnout and it'll spin through 1st like a champ, (gotta love that 6.2L) but then it goes to shift and the shift is soooooo slow that it gives the tires time to catch traction. Then the 1-2 shift finally happens and it bangs and jerks into 2nd then immediately downshifts back to 1st. it's embarrassing. I bought the 6.2L for a reason, it has the power to spin through 2nd before finally catching traction as the vehicle speed matches wheel speed but it never gets the chance because of the crappy 1-2 shift characteristics.

 

 

2. Shift into gears too early under light throttle. Especially when making a left turn, it upshifts and clunks then hunts for gears when I go to accelerate out of the turn.

 

If anyone has any experience with these issues please chime in. I have 29,XXX miles on the truck so I'm still under warrantee but I am sick of thee issues.

 

EDIT: upon more reading this morning I've came across TSB # PIP5175B, this sounds "similar" to my problem. How do I get GM to address it??

 

-David

 

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pm26 Senior Enthusiast

pm26

Posted
Posted

It takes so long the engine hits the rev limiter in between shifts and I can tell it does because I have a Borla Atak exhaust on the truck so I hear all the tones that the sock exhaust would normally hide. I

Hmm, I wonder how long would that "sock exhaust" last.

 

OK, I would recommend a custom tune. Despite the powerful engine, factory transmission shift tuning is designed for maximum fuel economy and protection of the drivetrain, not great driving sensation. GM will not do much for you, the dealers will not alter the factory tune.

Have you tried driving aggressively in the tow/haul mode to see if you like it better? That mode raises the transmission shift points and will not hurt anything, except the fuel economy.

 

I would also check with my local dealer if there are any software upgrades for that model year.

midwestdave33 Enthusiast

midwestdave33

Posted
  • Author
Posted

Hmm, I wonder how long would that "sock exhaust" last.

 

OK, I would recommend a custom tune. Despite the powerful engine, factory transmission shift tuning is designed for maximum fuel economy and protection of the drivetrain, not great driving sensation. GM will not do much for you, the dealers will not alter the factory tune.

 

 

The sock is what makes a factory exhaust so quiet. :nono: everyone knows that! For the record, Lets see you type better than me with two sticks like the one on my right hand above. Cut a quad a break :bs::lol:.

 

ok,ok, seriously tho, have you heard of TSB # PIP5175 ? I think my trans was made in Mexico like the ones that's TSB addresses. And it mentions a mechanical issue inside the trans that gives trouble.

Z45 Senior Enthusiast

Z45

Posted
Posted

Look on the lower rh portion of the window sticker, its tells you where the transmission was made.

 

RE:

midwestdave33 Enthusiast

midwestdave33

Posted
  • Author
Posted

Look on the lower rh portion of the window sticker, its tells you where the transmission was made.

 

RE:

 

I don't have the window sticker, it was lost to the company who did the wheelchair conversion. I have an appointment today to address the possible TSB #PIP5175B

 

I will update afterwards and let it be known what I find out.

pm26 Senior Enthusiast

pm26

Posted
Posted

 

I don't have the window sticker, it was lost to the company who did the wheelchair conversion. I have an appointment today to address the possible TSB #PIP5175B

 

I will update afterwards and let it be known what I find out.

You can get a build sheet from any GM dealer parts department if you give them the VIN. I got a build sheet for a 2001 Chevy van I was thinking about buying. The build sheet may not tell you where certain parts were made, but it will list all standard and optional equipment on your truck, much like the window sticker.

midwestdave33 Enthusiast

midwestdave33

Posted
  • Author
Posted

ok, so I didn't realize this but they are going to have to pull the transmission to check out TSB# PIP5157B. I wasn't prepared to leave the truck at the dealers at my last appointment so I've scheduled to have it done next week. it sound like this will be the fix for my issues. i'll keep this thread updated for those of you experiencing the same issues.

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