DEXRON VI???

[1911HD]

Lately I have been thinking about changing the tranny over to synthetic and whether to go with Amsoil or Mobil 1 when i came across in my owner's manual that it calls for DEXRON VI. Amsoil and Mobil 1 do not say if their ATF is a suitable substitute for the DEXRON VI. I did a search on Yahoo and came across something from GM saying all 2006's with the Hydra-Matics will be factory filled with the new Dexron VI. Here is the link DEXRON VI

Now i guess my question is...Is this a synthetic or not? If so, could it be just as good as Mobil 1 or Amsoil? I mean, is there something in this Dexron VI that my tranny depends on that would prevent me from going to an aftermarket synthtetic? Any help would be appreciated, thanks in advance.

[Black02Silverado]

As of today AMSOIL is not a sutable replacement for the new Dexron VI. I do not know about Mobil 1. I would make sure I use a Dexron VI when changing out your fluid.

[redbugdave]

Hello John...My truck has the Dexron 6 in it also. I think we need to sit tight for awhile and use GM's product. But, it will be a matter of time before the other oil companies start to sell their product which meets the Dexron 6 specs. When that happens, I suspect the competitor's prices will be lower than the original stuff. I also noticed that if you have the manual transfer case (4WD), it takes Dextron 3...H spec. I would suspect that the Dex 6 would work there, also...one fluid for both applications?

[1911HD]

Dave, do you have the 4l80E or the Allison? Maybe you Ally owners out there could specify? As far as I can tell, the new Dexron VI is for both autos in 2006..correct me if I'm wrong. As far as the transfer case thing, i have the electronic one and in my owner's manual it calls for the Auto-Trak II stuff. I have done searches on here and it seems like the conclusion was that unless you actually have the autotrac transfer cases found in the 1/2 tons, you should use Dexron III. Mine already came filled with the blue stuff so maybe someone could enlighten me here also. Thanks again.

[dewfpo]

I am not doubting what you say, but I'd be really surpirsed if you have the Auto-Trak transfer case. Up until now, they were only available on the 1/2 tons, and an option at that.

 

DEWFPO

[Black02Silverado]

Dexron VI is a replacement to any application on back. So you can use it where Dexron III was recommended. You just can't put Dexron III where VI is required.

 

I don't have an exact time frame on when AMSOIL will make a replacement. If it is like any of the other fluids like for the Allison I would think it will not be to far off in the future before they come out with one.

 

Mobil is in the same boat and I'm sure they will follow as well. We just have to wait and see.

[redbugdave]

Hi John, Nick and Walt,

 

John, I have the 4l80E xmission. Like you, I have also done some researching the Dextron 6. It is going to be used in most GM cars, etc. in the future. I do not know if it is synthetic or not. I suspect it is...

 

I have the manual shift 4WD. With the electronic (push button) 4WD, you do have to use the Auto-Trak II. It's expensive stuff...but no choice.

 

Like Nick said, from what I had read, the Dex 6 can be used in place of Dex 3, but not vice versa.

[1911HD]

Hey guys, thanks for the help!

[silverado3500]

Isn't the new dexron 6 also going to be the fluid that they use in the new transmissions that are designed not to have the fluid changed?

 

Also, the Autotrac transfer case was only available on 1500s and light duty 2500s. 2500HD/3500s have an optional "electric shift" transfer case, but its not the same as the autotrac. An easy way to tell is on the 4x4 switch, an autotrac transfercase will have a round button that says "auto 4x4", 2hi, 4hi, 4 lo, while the electric shift only has 2hi, 4 hi, and 4lo.

[polarisboy]

I know that the Dexron-Mercon V was a synthetic blend. Maybe the VI is fully synthetic.

 

We use the Dex/Mer V to replace III in our Tucker Sno-Cat trail groomer to help with the heat in the T/case and the Allison.