Oil must be level
with or slowly flow back out of fill/level plug. Transfer cases
that have the ACD fill rather slowly due to the fact that the oil has to
flow through small passageways. You will need to fill and
check the oil level many times during the filling of the ACD transfer
case. Chances are that when you think have an ACD transfer case
filled with the correct amount of oil, it'll still need a little more. Drive a short distance, around the block, and recheck the oil level.
EVOLUTION OWNERS TAKE
It is of utmost importance that the transfer oil be checked again after
you have driven the car a few miles at speeds over 25mph
to allow the oil to properly coat everything inside
the transfer case, this is especially important when using REDLINE
Shockproof in the transfer case. Drive a short distance and recheck the oil level.
EVOLUTION OWNERS TAKE
The Active Center Differential transfer cases require special
attention during the filling with oil. Due to the design of this
transfer case the gear oil must travel through tiny passageways in the
ACD clutch pack
assembly before making its way to the ring & pinion. You must make
sure to get the proper amount of oil in the transfer case or you will
ruin it immediately. Make
sure to check the oil level several times during the filling procedure
making certain that you have filled the transfer case to its full
capacity. When you think that you have enough in there wait a couple
minutes and recheck the oil level.
If you try to rush
this process, chances are that when you think have an ACD transfer
case filled with the correct amount of oil, it'll still need a little
more. Ideally, you should be able to let the transfer case sit for at
minutes and upon inspection of the oil level it should be full enough
that the gear oil should drip back out of the inspect/fill hole.
When you are all done,
drive a short distance, like around the block, and recheck the oil level. I
know it sounds like a hassle but I'm trying to help you out here. If you
run the transfer case low on oil you will ruin the ring & pinion gear.
Change the transfer
case oil every 5k-10k miles. Vehicles
that are being road raced require race car maintenance and all
drivetrain oils should be inspected after each race and changed as
Road racing applications may add an additional 1/2 pint of
oil to the transfer case for added lubrication and cooling. New or
recently rebuilt transfer cases should have the oil changed after the
initial first 500-1000 miles.