Now something that I constantly see failing in the
EVO is the front pinion bearing. This is a common occurrence in both daily
drivers and EVOs that see track time.
Apparently, Mitsubishi lowered the position of the oil fill/level plug in an attempt
to reduce parasitic drag to increase fuel economy. However, the lower oil level creates a lubrication
problem where the front pinion bearing doesn't receive enough oil to keep
it lubricated causing the front pinion bearing to run hot.
This overheated bearing on the right was
in a completely stock daily driver with less than 40k miles on it.
Another pinion bearing that ran hot. Note
the burnt oil and polished inner race bore from the bearing spinning on
the pinion shaft.
A makeshift solution has been to add some extra oil to
the rear differential but how much oil to add has been hard to know for
sure until now. So here is a nice solution that allows you to easily add the
additional correct amount of oil which will keep your front pinion bearing from running hot
and ruining your day.
Note: Fill the rear diff until oil level is halfway
up the sight glass. New oil sight covers have a fill line engraved on the
cover. Oil capacity is increased approximately 25%.
new rear cover
oil sight glass
new fill plug & washer
new breather vent
If you are only
wanting to purchase a new upgraded cover the cost is $120.
Want to see another service that we offer that keeps
your transmission happy, click here.
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