[penski61]

4wd or 2wd ?
bottom of the page , there is also a 3.73 option thats not listed
if your 4wd there is no option for the front gears but you could purchase the 3.73 rear gears and buy a front diff from a nismo kc manual
Frontier - Differential Gears | Nissan 4x4 Parts, Nissan 4x4 Off-Road Parts and Accessories | Rugged Rocks Off Road and Communications

 

[penski61]

you would need the master install kit as well as the ring and pinion for the rear , since you are 4wd 3.73 ratio is really your only way to go
( you need to have a professional install them )
the front is easier to install as an assembly

 

[penski61]

yes stock is 3.69 , but 3.73 is a 1% difference i think youll be perfectly fine with that