Gear ratio for 37" tires?

[BRUTAL]

I have 4.56's w/33's and i would never consider a 4.10 for 37's, not even 35's. Remember that factory gearing is for what the general public uses the truck for. Alittle towing of thier bass boats and driving on gravel. Go bog or go home. I would do 4.88's if they were avail

[JRT.Pro-4x.11]

Are there any websites online that sell the Titan diff and pathfinder driveshafts together or do you just get the stuff from a junkyard?

[dan826]

Originally Posted by JRT.Pro-4x.11

Are there any websites online that sell the Titan diff and pathfinder driveshafts together or do you just get the stuff from a junkyard?

I got my diff from the junk-yard for $450 in great shape. Found it near me at

Car-Part.com--Used Auto Parts Market


Brand new it is arround $1100 from:

2012 Nissan Titan Crew Cab OEM Parts - The Nismo Shop

The Pathfinder half-shafts are expensive at $410 a piece:

2013 Nissan Pathfinder OEM Parts - The Nismo Shop

You can get aftermarket ones for much less ($78-$164)

2010 NISSAN PATHFINDER 5.6L V8 Drivetrain : CV Half Shaft Assembly Auto Parts

[JRT.Pro-4x.11]

Thanks man I appreciate you helping me. I guess it probably won't be to hard to find a Titan diff at a junkyard because there's probably about 5 in every junkyard with blown motors haha. So why do you have to swap the stock diff for a Titan diff? Why can't you re gear the stock one?

[dan826]

Originally Posted by JRT.Pro-4x.11

Thanks man I appreciate you helping me. I guess it probably won't be to hard to find a Titan diff at a junkyard because there's probably about 5 in every junkyard with blown motors haha. So why do you have to swap the stock diff for a Titan diff? Why can't you re gear the stock one?

As far as I know, nobody makes gears for the r180. So the current situation is that you can get an m205 and replace gears, or you can keep the r180 and get a locker, but you can't have both.

[JRT.Pro-4x.11]

Oh okay. What would adding a locker do for the gear ratio? I thought lockers were just to make both wheels spin the same right?

[dan826]

Originally Posted by JRT.Pro-4x.11

Oh okay. What would adding a locker do for the gear ratio? I thought lockers were just to make both wheels spin the same right?

Lockers are for off-road use so that if you get one wheel in the air the other still has traction. They don't typically alter the ratio at all. With most lockers you basically replace the entire carrier assembly which is the unit with the spider gears and where the ring gear bolts on and where the axle shafts go in. Typically you take your existing ring gear from your old assembly and put it on the new locker assembly, and keep the same gear ratio as before.

[westracing01]

EDIT: Dan beat me to it.

JRT: You're an auto yes?

[JRT.Pro-4x.11]

Yea it's an auto

[westracing01]

Well, if you wanted to put in a Titan Diff and not re-gear, then you'd need to find one with the 3.36 ratio, which came in the big-tow optioned Titans. However, since you do want to re-gear your options open up some. You need to find a 2007+ diff, any ratio (2.94 or 3.36 but the 2.94's are a little cheaper.)

Figure $400-500 for the diff, $150 or so for a pair of V8 Pathfinder halfshafts from rockauto, front and rear gears from rugged rocks in either 4.10 or 4.56 flavor (get the 4.56's, you won't regret it) along with the install kits (major overhaul kit for the M205 at least, I'd opt for the major overhaul for both) plus a new yoke for the M205 to match the 29 spline pinion, around $900 or so for all of it, plus install of the gears which can range anywhere from $350-600 depending on where you live. So, right around $2250 to regear it unless you can do the gear install yourself. It's not super hard, but tedious and is usually left to the pro's.

Just wanted to give you all the nuts and bolts of what it entails.