My rear axle is 11.50 what is this?? I am used to 4.11 or 3.73

 

11.5 is the ring gear diameter, not the ratio.

You still have either a 3.73 or a 4.10. Unless your window sticker says 4.10 axle ratio, you have the 3.73's.

 

nothing on the window sticker so I have 3.73. I am a little ignorant when it comes to gear ratios so what is the difference between 3.73 and 4.10
I believe the 4.10 has more bottom end torque not sure

 

Yes, 4.10 has more bottom end torque which is helpful for towing. The real world difference is about 200 rpms. My 4.10 gears get me to 67 mph at 2000 rpms.

 

In a simplistic form:
Rear end gear ratio is the the number of turns of the drive shaft to the turns of the rear axle. For 4.10's it means the drive shaft turns 4.10 times for every revolution of the axle. 3.73's are 3.73 revolutions of the drive shaft to 1 revolution of the rear axle.

When it comes to torque think of at as a 10 speed bicyle. When your in the lower gears you have to pedel more but it is essier to get up the hill. Which is the same for you engine with 4.10's than 3.73's.

 

Thanks that cleared things up for me. Right now I am towing approx. 13000lb 5th which i do with no prob. with the setup I have Like70 mph+ in OD
Iam thinking about putting 33 or 35 inch tires on but i do not want to sacrifice any power or would it make a difference with all of the torque this baby has?