Gen 3 4.9 Diffs

[radchad074]

I am looking for some 4.9 diffs for the gen3, what should I be looking for? Is the locker a separate component on the rear diff carrier? It is hard to tell the working condition so assuming pulling them apart after purchase?


Anything else to consider when looking for the diffs?

Cheers.

 

[MontySquareo]

i don't know if the gen 3s came with lockers in the US, ones with a sunroof have an LSD though.

 

[plh]

No Gen 3 stock lockers in USA. ARB does sell them aftermarket.

 

[MontySquareo]

there's also an aftermarket e locker

 

[radchad074]

I finally scored a set of 4.9 diffs, the rear has the hybrid LSD which is cool.
A couple questions for the folks with a tons of knowledge.
1. Should I rip them open and take a peek? Replace any seals and stuff?
2. Are rebuild / seal kits available?
3. I saw YT that folks cut the rear mounting bolts off instead of dropping the gas tank, I did not get the bolts with the diffs, what size bolt works?

Cheers! Happy Montero'ing

 

[Michael Brown]

I swapped my rear diff and did not need to drop the tank or cut anything. Everything unbolted normally.

 

[radchad074]

I swapped my rear diff and did not need to drop the tank or cut anything. Everything unbolted normally.

Interesting, I will take a look and see how they are bolted up on my rig.

 

[Michael Brown]

Do make sure to take off the emergency brake once you break the bolts loose.
Use a wheel chock on the front to keep it from rolling since you're disabling park when you unbolt the driveshaft to the rear.

 

[CharlieNorth]

A Gen 3 with 4 speed auto had 4.9 gears, a 5 speed has 4.3
The fuel tank is along the right side of the vehicle last I knew, not behind.
I would NOT open the diff to take a look, they do not break.

 

[radchad074]

A Gen 3 with 4 speed auto had 4.9 gears, a 5 speed has 4.3
The fuel tank is along the right side of the vehicle last I knew, not behind.
I would NOT open the diff to take a look, they do not break.

Cool, thanks! I was watching a YT video that a forum member posted and he talks and shows how the tank gets in the way of a bolt.

 

[CharlieNorth]

Is there some reason you are unable to look under your own vehicle and look at what the task will take. And how do you intend to lower the differential once unbolted?

 

[Denis 19853001]

Cool, thanks! I was watching a YT video that a forum member posted and he talks and shows how the tank gets in the way of a bolt.


View attachment 774413

Можно было болт не пилить, а открутить отдельно редуктор от этой балки. Гайки сверху отлично откручиваются.

 

[Michael Brown]

Is there some reason you are unable to look under your own vehicle and look at what the task will take. And how do you intend to lower the differential once unbolted?

I used a floor jack and an extra set of hands to help balance it. They are not extremely heavy, but awkward to hold above you.

 

[radchad074]

Is there some reason you are unable to look under your own vehicle and look at what the task will take. And how do you intend to lower the differential once unbolted?

Nope, not sure what else to say. I can look under the vehicle and I have!