I have a 2002 1500HD and I just noticed today that in front of the battery there is sticker that says "this vehical is equiped with an automatic transfer case and should not be dynoed or damage may occur." I have the Auto 4wd. Does anyone know anything about this. I was looking at dynoing it in the next few weeks. Should I or shouldn't I?

JK

 

I would have to assume that means, don't dyno it while in "auto 4wd". reason being, if the rear wheels slip at all, the 4wd will engage and you'll kill someone, lol.

I would say as long as you make sure you are in 2wd, you're all set. Maybe i'm wrong. Just my thoughts.

 

sounds about right...
I think my 04 1500 4x4 has the auto transfer case. Just keep it in 2wd.

 

dont have a 4x4 but i could not imagine why you would not be able to dyno it other than the obvious reasons stated above and heck if your not sure just call someone and ask em like a mechanic or somebody that works for GM

 

I've had my 2000 4wd Sierra dynoed and as long as you keep it in 2wd you'll be fine.

00z71sierra

 

On my 4x4 i have noticed that when not in 4wh, the front out put shaft is still enegaged slightly -- If you get a wrench you can turn it without the truck moving - i think this is normal with trucks equipped with auto track- I would remove the front shaft so that you do not burn up the clutch in the shaft

 

That is what I was thinking but I just wanted to make sure. I am not sure why anyone would want to dyno a 4x4 truck in 4wd.

Thanx for the responses

JK