I am happy my truck came equipped with the 3.92s but I would be even happier with the 4.10s. My truck still seems to find plenty of bog sessions with the 5-speed transmission.

 

my 4:10's were special order

 

my factory 05 dodge ram 1500 4.7 v8 came with 3.92 gears but i dont have the tow package and i do have lsd

 

3.92's were automatic with factory 20's (just like the PS cooler).

 

My 03 had 3.55s, now it has 4.56 and I love them. Our 09 with tow package and 20" has 3.21s which will be switched out with 4.10s soon.

 

okay thanks for the info guys, im glad i have the 3.92 gears

 

hey guys, how do you know what gears you have, i would like to know what i have, is there somewhere on the truck i can look and find out. I have a 2002 quad cab 4x4 1500 slt, with the tow package, thanks for any info. i got a 6 inch lift and 35s and its doesnt seem to be to sluggish when it is accelerating or when i still pull my boat and enclosed trailer, so im thinkin i have the 3.92's but just wanted to see if i could find out

 

I think in the glove box it should say...

 

A sticker in the glove box, if it's gone, then there is also a tag on the rear axle. If you strike out there, you can always get on the Dodge Ram website and ask for a build sheet.

 

What he said. If not, then you can jack the @ss end up and watch the rotations between your drive shaft and tire. The ratio of how many times your tire completes a revolution versus your driveshaft will tell you what the numerical gear ratio is (close enough, anyway).