motaro9424 wrote:So, my quetion is I am looking to replace the whole carrier ( differential), but I dont know which is the final ratio (5.173 or 6.12) on my Rogue is a 2011 sv AWD.
According to the service manuals, the final drive ratio of the R145 rear diff is 2.466 on all model years.
Perhaps you are confusing the the CVT final drive ratio? It did change from 6.12 to 5.798 in MY2011, but the rear diff ratio remained unchanged.
Replacing these parts is
NOT a DIY project. Some special tools are required and the knowledge on how to service/repair differentials. I strongly recommend either:
A) Have a dealer perform the service.
B) Find an auto recycling yard and buy a used differential. Diff swaps are as easy as bolting/unbolting parts and are within the reach of the average home mechanic. Start looking here:
http://car-part.com/
Hint: Select 'carrier' for the part.
I belive my car doesnot have warranty BC is a Salvage car.
This is a downside of buying a salvage title: no warranty. You are totally out of luck.
From the Nissan warranty guide:
SALVAGE TITLE
This limited warranty does not apply to any vehicle, and is rendered VOID if the vehicle is (or ever has been) issued a “salvage” or similar title