TD5 transfer box oil level high

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potus

potus

Well-Known Member
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Location
South Devon
Hi all, does anyone know if its possible for the gearbox oil to top up the transfer box? Guessing it must be possible.

Query comes about because I removed the transfer box fill level plug to be greeted by a litre of oil pouring out of the fill hole. Not removed the drain plug yet.

Have not checked the transfer box level yet, need a torx bit to remove the fill plug so will pick one up tomorrow.
 
Drained 4.0 litres of oil out of transfer box and 2.3 litres out of gear box. Guess the transfer box was just overfilled by previous owner although I've no idea how that is even possible?
 
The filler plug hole on my transfer box is not a level plug. (This might be different for pre puma boxes?). So it is possible in my case to overfill it. The official workshop manuals advise for this, but the new Haynes manual for Pumas incorrectly call it a filler level plug :eek:. There are loads of other mistakes in the Haynes for Pumas, not least the under bonnet and underside views for a TD5 :rolleyes:.
 
Guess I'm thankful that there was the correct amount of oil in the gear box and that it hadn't somehow topped up the transfer box.
 
Hopefully the relevant page has attached (for the Puma tx box filling), you will need to verify the condition for other models however.
 

Attachments

  • Defender MY12 Workshop Manual (dragged).pdf
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Just pointing out a possible reason his tx box has been overfilled. I don't know what the fill requirements are for other models and make it clear that the condition needs to be checked for other models. Is the filler plug also a level plug on all other defender models?
 
There's a filler plug that's further up. In 20 years working on Land Rovers I wasn't aware of it until a mate brought his TD5 90 to me complaining of an oil leak from the transfer case. I opened the level plug and made a total mess of my garage floor. when I asked him where the hell he had filled it from, he pointed to a bolt that I just wasn't aware of.
 
potus said:
Hi all, does anyone know if its possible for the gearbox oil to top up the transfer box? Guessing it must be possible.

Query comes about because I removed the transfer box fill level plug to be greeted by a litre of oil pouring out of the fill hole. Not removed the drain plug yet.

Have not checked the transfer box level yet, need a torx bit to remove the fill plug so will pick one up tomorrow.
Click to expand...

I thought you were going to say the bottom of the case was full of water!

For reference a leak from main box to t-case or vice versa, I would say is highly unlikely - the main box has a seal where the shaft comes out and that shaft then goes through a seal on the t-case so 2 seals would need to fail for transfer of oil, also, the oil would tend just to run down between the boxes.
 
reiny said:
There's a filler plug that's further up. In 20 years working on Land Rovers I wasn't aware of it until a mate brought his TD5 90 to me complaining of an oil leak from the transfer case. I opened the level plug and made a total mess of my garage floor. when I asked him where the hell he had filled it from, he pointed to a bolt that I just wasn't aware of.
Click to expand...

The one that should never be undone and used as a filling point.
 
potus said:
Hi all, does anyone know if its possible for the gearbox oil to top up the transfer box? Guessing it must be possible.

Query comes about because I removed the transfer box fill level plug to be greeted by a litre of oil pouring out of the fill hole. Not removed the drain plug yet.

Have not checked the transfer box level yet, need a torx bit to remove the fill plug so will pick one up tomorrow.
Click to expand...
I read somewhere the gearbox oil seal can fail and overfill the transfer box as the gearbox runs at a higher pressure
 
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