gmt-800 gearing

[mobil1syn]

checks the calender, yep its tuesday

what ratio of a gmt-800 chassis with a 5.3 and 37s? DD/family adventure shuttle. largest rocks it will see is the rubicon, mainly running around the dezerts and local mountains.

im getting mixed results for my circle.

 

[backchat]

Gear Ratio Calculator

 

[TRINDU]

Whatever the lowest option is for those shit axles.

I prefer 4.10s in a stock truck, the 3.23 & 3.42s are a joke. 3.73s is barely acceptable.

There is no harm in letting the 5.3 sing, you threw mpg out the window with 37s, so go for performance now.

 

[mobil1syn]

not stock axles. 4.10, 4.88, 5.38 are my options

 

[TRINDU]

4.88 would put you back to 'stock'. Considering added weight and aerodynamics, my choice would be 5.38s.

4.10 is a waste of time.

 

[toomany]

I have 4.88's with a 5.3 and 35's. For what the truck gets used for, it's perfect. DD, light off road.

Id want it lower though for more serious offroad. I'd go 5.13 or 5.38.

 

[mobil1syn]

5.38. I’m assuming you are using a 4l60, and that is going to need all the help it can get to live. I’d lean towards over gearing a 4l80 too, because I’ve never thought 1st was low enough in them, but 4.88 would make more sense for most people

yea currently a 4l60, when it blows up a 4l80 will be heavily considered.

i am not afraid of the motor spinning on the highway if i get a little more grunt out the hole.

 

[gozuki]

I'll be going 5.38 with a 4.3 v6 and 42s

 

[Rennat_2006]

5.13 is what i would recomend. Im on 37s with 4.88 and wish i would have went with 5.13. 5.38 if those arent an option.

 

[Bebop]

If you swap it to a 4l80, first gear is higher than the one from a 4l60.
Given this consideration I'd definitely add to the 5.38 band wagon.