Thread: Help Urgent - Transfer Case Refill

G'day Shaun, I you definitely removed the correct plug then it was obviously overfilled. Pull the plug back out and let it drain until it is at the plug level then reinstall plug. Then check the gearbox, most likely this is where the excess oil has come from.

It sounds to me like it may have been overfilled, maybe to allow for the leak.

The Haynes manual has the level at the botom of the filler hole.
UP on the linked thread has 2mm over the lower edge.

If it was mine I'd allow it to drain from the filler plug hole behind the hand brake.

If it's a maual check the gearbox level also.
I'm not sure if the gearbox oil can get into the transfer box if the seals are gone.
On the auto it would weap out the join.

I thought that may be the case.

Is the oil for the gearbox the same as the transfer case then?

It is a manual.

The oil for the transfer case is CASTROL SYNTRAX UNIVERSAL PLUS 75W-90 and the manual transmission is CASTROL SYNTRANS 75W-85 .. That is the castrol brand anyway

Ok so I undid the filler plug again and there was still more oil coming out, so I did it back up as it was slowing down which would mean that it should be at the right level.

I am not sure how to check the gear box level. I have looked at the manual that I have and it gives a very close up picture of the drain and filler plug so I am not sure what I am looking for in the bigger picture.

Will it be OK to drive the car if the gearbox is now low in oil? The transfer case will still let more oil out if I undo the plug. All up I would say I have lost a bit over a litre.

Shaun.

If you are indeed undoing the fill plug on the t/case (it's almost tucked behind the parking brake drum) I'm guessing someone has filled it through the temp sensor plug in the LHS of the case high up.

It apparently happens from time to time.

The R380 g/box has a large hex plug low down on the RHS of the case facing the front driveshaft to drain, and a T55 Torx plug above and half way up the side of the 'box for fill.

Always undo the fill plug first, just in case you can't get it undone.
An empty compartment without any way of filling it wouldn't be good

Originally Posted by ShaunR

Ok so I undid the filler plug again and there was still more oil coming out, so I did it back up as it was slowing down which would mean that it should be at the right level.

I am not sure how to check the gear box level. I have looked at the manual that I have and it gives a very close up picture of the drain and filler plug so I am not sure what I am looking for in the bigger picture.

Will it be OK to drive the car if the gearbox is now low in oil? The transfer case will still let more oil out if I undo the plug. All up I would say I have lost a bit over a litre.

Shaun.

The filler plug will be about 1/2 way up the side of the gearbox.
My book shows that a Torx 55 is needed(one of those star shaped tools).
By my picture it's on the front tail shaft side.

A short drive to a mechanic to check the levels should be OK.
I'll cover my self and say it's not ideal though.

Ah I know I don't have the tool to undo the gear box filler plug so I may get it down to a local mechanic and have them check the levels.

I do not know if you have a td5 with diesel heater if you have it, I think your problem may be that the heat from it, or something else has melted the plastic into the vent that comes up on the right side of my it is left-hand drive so I do not know where they come up on your.
I do not think you have too much oil, but I think the air is tight so it has created an overpressure in the gearbox which is not good, it also tends to be a little sound hizzz
so I think you should inspect the venting after checking the oil level, I guess it hiss when you inspected it last time at the level cap? and that the oil is squirted out'transmission oil does not taste good, I've been there
Grief