Disco Transfer Box Casing problem

Hi!

I recently took my 1997 Disco Tdi for a service and to check on oil leaking
from the transfer box. The workshop said the leak was due to wear on the
transfer box _casing_ and they would have to replace it. Needless to say,
this cost me quite a bit. Now, my knowledge is limited, but a few questions
spring to mind. How can normal wear cause a transfer box to leak? I
thought all moving parts would be on bearings. I'm also under the
impression that all the oil seals move against the input/output shafts and
are stationary against the transfer box casing. Can anybody enlighten me as
to how typical wear would happen on a transfer box casing and how it would
cause oil leaks? Did they take me for a ride?

To make things interesting, a couple of days after receiving the vehicle
back, I noticed there's still oil dripping from the transfer box. I took
the disco back to the workshop and they said they will investigate. Now
they tell me they discovered a leaking oil pump. They also said this
particular pump is a sealed unit and they would have to replace it.
Hmmm...I went through Hayne's Disco Workshop manual and some Defender Tdi
workshop manuals (I reckon they're pretty similar re. stuff like engines,
gearboxes, transfer boxes), but couldn't find any other oil pump but the
engine's oil pump situated inside the timing belt housing. Am I missing
something?

Any help appreciated
Gerrie

In message <[email protected]>
"Gerrie" <[email protected]> wrote:

> Hi!
>
> I recently took my 1997 Disco Tdi for a service and to check on oil leaking
> from the transfer box. The workshop said the leak was due to wear on the
> transfer box _casing_ and they would have to replace it. Needless to say,
> this cost me quite a bit. Now, my knowledge is limited, but a few questions
> spring to mind. How can normal wear cause a transfer box to leak? I
> thought all moving parts would be on bearings. I'm also under the
> impression that all the oil seals move against the input/output shafts and
> are stationary against the transfer box casing. Can anybody enlighten me as
> to how typical wear would happen on a transfer box casing and how it would
> cause oil leaks? Did they take me for a ride?
>
> To make things interesting, a couple of days after receiving the vehicle
> back, I noticed there's still oil dripping from the transfer box. I took
> the disco back to the workshop and they said they will investigate. Now
> they tell me they discovered a leaking oil pump. They also said this
> particular pump is a sealed unit and they would have to replace it.
> Hmmm...I went through Hayne's Disco Workshop manual and some Defender Tdi
> workshop manuals (I reckon they're pretty similar re. stuff like engines,
> gearboxes, transfer boxes), but couldn't find any other oil pump but the
> engine's oil pump situated inside the timing belt housing. Am I missing
> something?
>
> Any help appreciated
> Gerrie
>
>

When the said the transfer box was leaking, did they mean there was an
oil leak between the gearbox (5th gear extension case to be exact) and
the transfer box? If so, the problem was quite likely to be one of the
two seals between the two leaking - not uncommon when either box has
run low on oil.

For details of the gearbox you need the earlier editions of the
Range Rover Classic Haynes manual - this one does cover the LT77
gearbox (and will give a "guide" for the R380) - the later manuals
omit the gearbox pertty much all together.

Richard

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