I have an 06' 3/4ton 4x4 - G56 -6speed. The dealer told me that it had the 3.73 gears, but I want to make sure. Where is the I.D. tag or info on the specs. I found one on my buddies 05, in the glove compartment, but I can not find one on mine that list the info. It sure doesn feel like it is winding out, at 70mph, I am at around 2250 RPM. My Brother in Laws Duramax at 17 is running around 1900.

 

The G56 only comes with the 3.73.

MikeyB

 

if there is a tag on the rear end it will be there. If the tag is missing write down the vin number, call the dodge parts dept, give them your vin, walla gear ratios. It really is that easy.

 

Go back to your dealer.They can enter your VIN in their computer and print out ever thing,standard and optional that was put into your truck,I have a bigger print out than what was on the window sticker when I first saw my truck.I was told that 3.73 was the standard off the assembly line ,but I am sure they put out a few 4.10 s as well without special order.

 

G56 6 speed only comes with 3.73.If it had 4.10s it would be screamng on the hiway at 60 mph.

 

I have 4.10 gears in my truck and run around the same rpm that you are. I also have 285/75/17 bfg's but that would not make much diffrence. I am around 2300 running 70, at 80 I believe i am right at or just over 2500. It seems like too many rpms un loaded but while towing it gives the advantage of not coming out of 6th gear for the mountain. Also it should be stated on the window sticker under axle ratio if you still have it, On the right hand side about half way down.

 

look on the inside of the glove box door.

 

Thanks for the input guys. So I guess the G56 with 3.73's is almost the same as the NV 5600 with 4:10's

 

Yep.Sure is.Do a seach.Lots discussion on this when the G56 first appeared.

 

My 05' 4x4 3500 has the tag in the glove box and it is 3:73. I have the 6speed.

 

Seems as if the '06 trucks do not have the glove box sticker. I haven't found a tag anywhere on mine, including the diff covers.

 

Same on my 07..... no tag on diff. or sticker in glove box.My 04.5 ctd had both. Guess DC is saving a few pennies ......

 

DC wouldn't do that now would they??