Gears, gears, gears

[lehiguy]

I have been poking around on various sites offering OEM Toyota parts. It looks like if you want 4.56 gears for the front diff, that's easy through aftermarket sources. If you want 3.90 gears, get OEM for an FJ Cruiser with a six speed manual. Now it appears that the Tacoma with a 2.7 had 4.10 gears. As far as I can tell, the front diff housing is the same. I am not certain about the carrier, but I suppose you could buy the whole assembly. Anybody else researched this?

 

[lehiguy]

Don't everybody respond all at once, you'll overload the server....

 

[4rs]

Don't everybody respond all at once, you'll overload the server....

Jerk response...

 

[noiwontsmile]

I haven't researched this, so whats the advantage of changing out the factory gears?

Unhelpful response....

 

[TRDCal]

OP, Have you regeared your 4runner already or?

What if you wanted a factory locker, could your swap an entire FJ rear end in? Not including the electrical work, would it pretty much bolt right up.

Jerk response...

I don't know, it was a bit funny

I haven't researched this, so whats the advantage of changing out the factory gears?

One common reason is if you put big tires on your 4runner you'll typically loose abit of power, so by regearing your diffs you can regain it. Althought some say its unnecessary, it is an option

 

[lehiguy]

I haven't researched this, so whats the advantage of changing out the factory gears?

Unhelpful response....

The factory gear ratio is optimized for the tire size. In order to keep the same mathematical leverage (that's what a gear ratio actually is, leverage, or torque multiplication) a lower gear ratio (higher numerically) is required. Yes, the FJ Cruiser center sections are a bolt in affair. Tacomas too, at least some years. Lockers will also go into the 4Runner housing with some modifications. There are some gear vendors offering an OEM 4.10 gear set. So Toyota is making it, I'm just trying to determine the application so I can keep an eye out for the wrecking yard trophy. There are some sites on which you can buy complete center sections with a locker for around $1100.