how can i tell what gear ratio i have without taking the rear end cover off?

its a 2002 5.3 auto ext cab short bed

 

glove box will tell you, but im not sure what the codes are. but im sure someone on here does. i belive GU6 is 3.42.

 

GT4 is 3.73

 

gt5 is 4.10

 

G80 - Locking Rear Differential

GT4 - 3.73 Rear Axle Gear Ratio

GT5 - 4.10 Rear Axle Gear Ratio

HC2 - 2.76 Rear Axle Gear Ratio

HC4 - 4.56 Rear Axle Gear Ratio

HC8 - 3.21 Rear Axle Gear Ratio

HE3 - 3.07 Rear Axle Gear Ratio

HO4 - 4.11 Rear Axle Gear Ratio

 

i just checked the glovebox and in the G section i have g80 and a g?4

 

thanks alot!

 

no problem

 

As long as the truck hasn't been modified. Mine says GT4....it should say GT5

 

GU6 is 3.42