Rear Diff oil leak


Hi hope somebody can help, i`ve got a 97 f78 2.8tdx and i`ve recently changed my rear diff oil and now having an oil leak problem. The oil is actually leaking out of the cross member above the diff ( i found this out when i parked with one side on the kerb and oil dripped out.)
I see there is a vent hose from the diff to this cross member, but i cant understand why its happening. it only seems to be when i`ve been driving at higher speeds.
I`ve topped the oil back up to the filler plug but this just made more oil leak.

it sounds like you are overfi

it sounds like you are overfilling. im not familiar with the diff, where is the filler plug, if its on top there should either be a level plug somewhere about half way up, or you have to put in a specific quantity of oil. normally u would expect the body of the diff to be about a half to two thirds full. the oil will expand a bit as it warms up which is why u see the leak after a long run.
the easy way is to leave it alone it will blow some oil out until its lost enough to stop it happening. if it was a sealed unit it would have blown a seal somewhere!!

Just a thought. Do you have

Just a thought. Do you have the reare end on ramps when filling (to make access easier)? If so (and I'm sure many, poss even 1 in 4) do the same, that could result in over filling as the fill / level bung is in the rear cover plate. As I said, just a thought.

Any veiws expresed in this thread by me are purely from my own experience, and (sometimes) falible memory. Hope my comments help, but please don't take them as gospel.

Any veiws expresed in this thread by me are purely from my own experience, and (sometimes) falible memory. Hope my comments help, but please don't take them as gospel.

My Fieldman did that from new.

.... and still does, although it's got nearly 100,000 on the clock.

All I do is top up the diff every 5000 miles or so.

Actually, a bit of chassis lube around that area keeps the dreaded tin-worm at bay, so I'm not too bothered.

When I was looking for my second 'trak, apart from seeing a whole lot of tat with 60,000 genuine (HA b....dy HA) miles flogged by a bunch of scumbags, I noticed that about one in four vehicles did this.

diff leak

Hi Adam,

Have you put the right oil in the diff. If you've got the wrong oil in it may be frothing the oil and blowing the froth out of the breather pipe. The oil should be EP 80W/90. Some vehicles use Automatic Transmittion Fluid or MT75 oil which you may have been given by mistake.


Diff leak

Hi all

I've got the same on mine and as a newbie was worried the diff was porus. I've used correct oil and not over filled. More investigation to take place me thinks.

That diff thing

Has the pipe got a full circle in it like a wine distillate once it gets going it will syphon. distillate sytem will stop this.
When you have taken the bolt out waz it low of EP 90? if so how low? on level ground.
Have you noticed the size of the pipe some may have a very small centre holl, eg can not breath if so take the pipe off this will let it breath easy dont go through deep water though, I asum u all have common sence. I have just put a engine in my sons fourtrak so when I get a chance I will have a look for u, I have a diff seal to do on it some time so I will try and take note.
but for my money it will be pressure build up (expansion of oil) clean oil air vent. just a thought is this problem the same with the front??. if not take note were, plus how high the pipe go`s above the diff housing & size of pipe. or vent size eg breater. if none of this works, sele and buy Landrover, then you will have big problem`s.