Breather locations on 2nd gens

I understand that the tranny, front transfer case and rear differential all have breathers.

Are the tranny and front transfer case breathers located in the engine bay and the rear differential is located on the top of the case?

Am I correct that the breathers are only one way , meaning they release air instead of taking in air to combat temperature change?

Reason I am asking. Went to the beach this past weekend and went through some water. Nothing major, only half way up the tire ( did get a bunch of seaweed everywhere under the carriage though, ha).

Trying to get a better understanding of the breather location. Thanks.

 

Yup, reading about the relocate now. Thanks for the help.

 

Digging that location. See some guys relocate behind the fuel door too.

 

+1 for behind the brake light. It doesn't really require any cutting or holes anywhere, just pull the tail light (3 screws) and zip tie the breather to the existing metal underneath. I even left my tail light wiring connected. Can be done in seconds.

 

if you went halfway up the tire, and are running the stock rear breather. drain and re-fill your rear diff fluid as you likely sucked in nasty salt water.

Reason being is the stock breather on the rear is a one way valve, it lets air out but not in. The rapid cooling of the diff creates a vacuum, only way for air to come in is through the seals at the end of the axles and pinion.

The reason why the "breather relocation" mod helps is two fold. 1. it moves the breather up higher (to tail light, cubby, gas cap etc) but 2 and more importantly, it uses a breather union that allows both air IN and OUT. meaning if you dunk the axle, air will in rush through the dry above water breather and not the axle seals.


Next. Breather locations for everything (in stock form)

Rear diff

• Top of diff housing
• On rear locker equipped models (TRD OR) there is a small secondary breather line from the electric actuator housing up to the crossmember above the rear axle

Front Diff

• Main breather routes inside the engine bay on the driver side inner fender and has a two way breather (allows both air in and out)
• Secondary breather for electric actuator for ADD routes to the same spot as the main breather and also has a two way breather.

Transmission (automatic - im sure the manuals are similar)

• 1 (i assume 2 way) breather routes up to close to the top of the bell housing on the passenger side

Transfer Case

• Main breather (assume 2 way) routes from the tcase to the bottom of the bell housing on the top of the transmission
• Secondary breather, routes from the electric actuator housing to the transfercase housing (no breather end needed as it vents to the tcase itself)

Hope this helps!