My friend and I were talking about gears for my truck today. He said I will have to buy two sets of 4.11 gears for my truck, one for the front and one for the rear, is this correct? Are they the same gears, or are they different, ie., are the 4.11 gears in back larger than the front??

He said the 4 wheel drive will not engage if I don't do both...

 

He is correct, you will have to buy two sets of the same gear ratio or you will get binding when you put it into 4wd, ie: breakage

 

yup, he's right.

It's one of the reasons I skipped the nitrous plan on my truck because I would need to go to a taller gear like a 4.56 if I wanted max effort out of the truck and at $1500 for a gear swap you can forget it. Plus gas milage is worse

 

Question, do I need another install kit for the 4.11 front end gear swap? Or is the install kit only for when installing the posi in the rear end?

 

for the price of a gear swap you could do A 6.0 swap.