My tuner says it is a 3.55 rearend
3.92 is an option i bought mine used or i would have prefered it. wanna 4.10 next but will wait on other mods 1st

 

AZZO, Where does your tuner tell you your gear ratio?

 

where you can change the ratio
it starts with what truck say it has
i THINK

 

Dont go off the tuner, visually check it

 

Wow the SC can indicate your gear ratio now?

Never knew that but x2 on what truckin said about visually checking it.

 

I only asked about the gear ratio cause I was confused about the timings vs a 6700 lb QC with SC only since I am in my mind, trying to find out what a stock QC was and no such luck so far since I have done a few mods (including SC) and surely should be quicker than what I am reading (7.91) regardless of elevation and 3.55 gear ratio.

(The Gear ratio Adj. is not avail for the 03 forgottens).

So AZZ0540 Dude you should enter the verified gear ratio, and if applicable measure your tires with a tape and enter the diameter in inches, as leaving it on minimum (31 " or whatever?) lmight throw off the Data-Log.

 

I adjusted my speedometer by first measuring my tire hieght and then making some passes on one of those radar signs in a nearby town. Gear ratio is read off of the tone ring located in the differential and is the VSS/RWAL sensor. Tire size is critcal to the tuner reading properly. Good luck...

 

Do you have anything extra on your truck? Winch, big rims or tires, grill guard, etc? That weight seems awfully heavy for a 1500.

 

6700 is the wgt paper work say

i boughtg it used i don't think there ne thing specail on it.
Just intalled K&N intake got 9.31 0-70 w/o Trac ctrl w/ F ton of tire spin.
need to do better run but cop pulled just as i started to do 2nd run
.1 sec off w/o tire spin should have been good run

Love the tone it adds to truck.

 

How
I sure don't know the diff, owned truck 2 months