Thread: Rear Main Seal 300TDI

I would have thought that a leak from the rear main seal could escape via the bellhousing-to-block interface or via the wading plug in the bellhousing. I also have a slow leak around that area but I think its the sump gasket; although, it could be the rubber "T" seals on the rear bearing block which are known to degenerate.

And I think LR use to recommend Dextron II for the gearbox until they changed it to MTF94 (copied from landyzone.uk):

TECHNICAL BULLETIN
MODEL/DERIVATIVE: Bulletin N o : 0007
Range Rover
Discovery / New Discovery
CDS. ref: L8462bu
Issue: 2

AFFECTED RANGE:
All R380 manual gearbox derivatives - refer to text for specific change points
All Freelander
RE - ISSUE INFORMATION:
Incorrect specification reference deleted from PARTS INFORMATION.
Please destroy your existing copy and replace with this Issue 2.
PROBLEM:
GEARBOX OIL - CHANGE TO SPECIFICATION

CAUSE:
At the following VINs, the original oil fill specification for the R380 gearbox was
changed to Texaco MTF94 high performance oil:
Range Rover - WA 384300
Discovery - WA 752315
Defender - WA 131138
New Discovery - All vehicles
The Freelander PG1 gearbox has used the new oil since introduction of the model.
ACTION:
MTF94 will be recognised by its orange/honey colour as opposed to the red
Dexron II oil previously used, and is now available from Land Rover Parts.
It is now the only oil which should be used for topping up and complete fill on
R380/PG1 gearbox applications.
The new oil is compatible with the old and to enable earlier vehicles to benefit from
its introduction, should be used retrospectively on vehicles prior to the above VINs
for all top up and refill requirements.
Refer to PARTS INFORMATIONoverleaf for details.
Until further notice, current Service Schedule gearbox oil change periods are
retained and must be adhered to.

depends on how badly the rear main has let go.


hows your clutch fluid?

Clutch fluid is fine, correct level and no leaks. Although I think the thrust bearing is on the way out. changed the clutch kit when the clutch fork wore thru at the pivot ball inside the bellhousing 6 years ago. Probably done about 110-130k on it since then. Still shift ok but the bearing noise is starting to increase so I know it's on it's way out. It seems to be a lot less noisy below 2000rpm and/or no load(Acceleration). Will try it today with the transfer in neutral and see what noise it makes.

Just pulled out the reciept for the last Service and guess what.
Valvoline- 15W40 Problend - engine
ATF DEX 3 - Assume Power Steer
Gear 75W85 -Assume Gearbox & transfer Case
LS90 - Assume diffs & Transfer
Just checked and the Valvoline is a replacment for the MTF94, I assume that it is red in clolour so ok. Couldn't find anything on valoline website.