4G63_EVO

iTrader: (4)

Here is what we found recently while my car was on the lift. Is there a seal I can change in the transfer case that may have gone bad? Is it as easy as removing the driveshaft and swapping the seal? The red is the fluid in question.

LetsGetThisDone

iTrader: (1)

Red fluid is red line heavy shock proof. Fluid will come out of the tcase when you pull the drive shaft, and it will need topped off when you're done.

tauro91

Couple of reasons why it could leak, can be overfill, or bad seals... the seal shaft seal part number is MR581295.
By the year of ur car I can tell urs is equipped with acd. You definitely do not want to run redline gear oil as that will ruin your acd clutch pack unit, is that red fluid redline or the acd atf fluid? Get it checked out if it's acd fluid u might wanna stop driving before u blow the ring and pinion.
If it's redline, drain and fill with oem fluid only if it's acd t case....

If it's acd atf fluid u might need a full t case rebuild... including all seals, bearings, etc..
regardless of hp always run mitsu gear oil on acd t cases.
(I can get u all oem part numbers and possibly cheaper "sale" price than most sites.... let me know

4G63_EVO

iTrader: (4)

Ive also heard to not run redline with ACD, its from previous owner who took it to RRE, I feel like they would know better. Im not sure if its redline or ATF thats leaking out, I do have a high pitched noise I hear right when I push the gas pedal, but its not very loud you can barely hear it and doesnt happen on decel. I think im gonna drain Tcase, pull the shaft and check/replace that seal, then replace with OEM fluid

4G63_EVO

iTrader: (4)

Also, I dont believe it is the ATF because my fluid level seems good.

LetsGetThisDone

iTrader: (1)

Shock proof won't hurt the ACD.

4G63_EVO

iTrader: (4)

Jack's claims it will..

LetsGetThisDone

iTrader: (1)

Jacks is wrong.

barneyb

You can remove the front section of the drive shaft by unbolting it at the first flange. Mark the orientation so you don't put it back out of balance. Also, the FSM instructs no lubricant on the bolt threads.

KOOLER

Few issues:

1) Case cracked. I've recently had to replace part of the transfer case because it had a crack.

2) Overfill. There should be around .5L of oil and if you put more it will run out. Been there done that

3) Every time you pull away driveshaft you'll 50% probably ruin the seal. Just replace it.

KOOLER

I fill my t-case with blue redline transmission oil. ACD. What do I do wrong?

tauro91

Fill it with the oem fluid, for acd u don't want that thick of fluid because the t case has very tiny oil passages which shockproof gets stuck and clogged.... As per redline states this is only to be used in racing dogbox transmission or such that has splash lubrication type. As far as a non acd t case I'd run heavy shockproof as long as u change it often.... Remember this is heavy duty track/drag racing fluids... Oem fluids are specifically engineered and formulated for our Evo for years...
Same with transmission shockproof is not meant to be used in our synchro transmission.