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2007 1500 w/VortecMax package - Tranny noise

wzschirnt

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wzschirnt Enthusiast

wzschirnt

Posted
Posted

Hi,

 

I have a 2007 1500 (new style) with the Vortec-Max package. Truck has about 68k miles and I use it mostly to tow a race car trailer (about 8500-9000 lbs).

 

In the past month, the transmission has started making noises. Best described as a "squealing" noise, similar to the noise a brake pad makes when it is thin and the metal tab makes contact with the disc. It sometimes changes to a noise like a lawn edger makes when it hits the cement sidewalk. (Just trying to describe the noise best I can!)

 

Occurs under a load (towing a trailer) with light throttle and going about 15-20mph. Mostly happens in 3rd or 4th locked-up. Add gas and it goes away. It sounds like something inside is grinding itself up.

 

I have the GM Extended warranty and will try to use it. But....the computer has been re-flashed by Black Bear (about 4 years ago) and I wonder about the dealer reaction if their scanner shows the tune change.

 

So, questions are:

- Guesses about the noise?

- Others that have gone to dealers with a 'tuned' computer?

 

Thanks

walt

 

  • 2 weeks later...
GreatWolf New Member

GreatWolf

Posted
Posted

I dont know about the tranny but is black bear tune worth it? how much more power does it give to the truck? thanks hope u fix your truck.

Chris Senior Enthusiast

Chris

Posted
Posted

Could be a case of the 4L60E's. You have either a 65 or 70 but same basic transmission

 

Sent from my Samsung Galaxy S4 using Tapatalk 4

 

 

wzschirnt Enthusiast

wzschirnt

Posted
  • Author
Posted

Hi,

 

Update and (some) questions answered:

 

Black bear tune - it did make a difference although I didn't dyno or race it before and after to get 'real' numbers. All I can tell you is that towing my (old) open race car trailer over the same route, "after" was downshifting less and pulling hills better. Of course, the AFM had been defeated also. Black bear people said "we love to tune the 6.0 engines and usually have picked up 30 rear wheel hp".

 

Problem:

- u-joints not the problem. I can make the noises while standing still and 'stalling up' the convertor to about 1000-1200 rpm. Noise was a little different in forward than in reverse.

 

- 4L65e is what I have been told. Big difference is 5 planetary gears instead of 4 in the 4L60e. I've never been really pleased in the way it acted in daily driving as well as towing, especially with the new enclosed (heavier) trailer.

 

The problem has not been fixed, but solved for me. Sold the truck to CarMax in Ft Worth today. If you want to fix it, watch their auction sites (black 2007 new style 1500 with bed shell).

 

Bought a 2006 3/4 ton Duramax. So a whole new world to stumble around in!!

 

Later

walt

Badass69 Senior Enthusiast

Badass69

Posted
Posted

Your truck has a 4l70e. Rpo code is m70 in the glove box. They started using the 70e with the release of the 06 vortec max trucks wiyh the lq9. Drop the pan and take a look for rubble

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

Your truck has a 4l70e. Rpo code is m70 in the glove box. They started using the 70e with the release of the 06 vortec max trucks wiyh the lq9. Drop the pan and take a look for rubble

he traded it ,,,,duh

gmtech4 Senior Enthusiast

gmtech4

Posted
Posted

Hi,

 

Update and (some) questions answered:

 

Black bear tune - it did make a difference although I didn't dyno or race it before and after to get 'real' numbers. All I can tell you is that towing my (old) open race car trailer over the same route, "after" was downshifting less and pulling hills better. Of course, the AFM had been defeated also. Black bear people said "we love to tune the 6.0 engines and usually have picked up 30 rear wheel hp".

 

Problem:

- u-joints not the problem. I can make the noises while standing still and 'stalling up' the convertor to about 1000-1200 rpm. Noise was a little different in forward than in reverse.

 

- 4L65e is what I have been told. Big difference is 5 planetary gears instead of 4 in the 4L60e. I've never been really pleased in the way it acted in daily driving as well as towing, especially with the new enclosed (heavier) trailer.

 

The problem has not been fixed, but solved for me. Sold the truck to CarMax in Ft Worth today. If you want to fix it, watch their auction sites (black 2007 new style 1500 with bed shell).

 

Bought a 2006 3/4 ton Duramax. So a whole new world to stumble around in!!

 

Later

walt

you'll love the allison !!!! dirtymax isnt bad either lol

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