HI GUYS.

i have just had my car mot'd french style and although it passed, they have informed me there is a slight oil leak coming from the transfer box;

not pouring out but the odd drip which they think is coming from where the transfer box joins the gearbox so perhaps leaking at the gasket,

they have passed the car but say it needs to be done obviously;

if it is the gasket, can this be replaced without dropping the main gearbox, ie just taking the transfer box out, and replace the gasket ?? or is it a bigger job, than im thinking ?

im just trying to get an idea of the size of the job and what i would expect to pay if a dealer in uk were to do the job, so i have an idea before going to the garage

bob

There are 5 places a trans box can leak, this does mostly apply to the latter cars, yours has the NV transfer box rather than the magna steyr one but:

1 mating face between the 2 halves of the shell
2 front input shaft seal
3 output shaft seal
4 solenoid
5 high low position sensor

You need to narrow it down, could be any of these and leaks can track easily round the gearbox

My disco leaked from the seal between the two mating faces
My last FF leaked from the position sensor and took ages to track down and I had the box halves resealed several times.

You don't need to take the main gearbox out to drop the transfer box  There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial

hi there
thanks for the info; im not in a position to do the job, but time wise, is it a straight forward job to drop the transfer box ? is it a job that would take a half day, or a day to remove:/ refit plus not inc the tracing of the leak?

also; i dont know how long it has been leaking, and how much fluid has been lost, so can this be checked/or topped up or id it a sealed unit ??

bob

The transmission and transfer box are separate components with separate (different) fluids. There is no gasket between the two. The transmission output shaft and the transfer box input shaft each have a lip seal to prevent leakage. The mating face of the two casings has a weep hole cast into it so that any leakage from these seals is apparent.

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hi phil

thanks for the pictures and info;

well all i know is it is dripping around the joining face , so from what you are saying is if it is red it will be the gearbox seal and if clearish will be the transfer box !!

i have no idea at present, but will take a look,

how long a job would i expect to remove the transfer box ? a few hours or days !!?

bob

just another point, if it is red fluid, denoting the gearbox seal, can this seal also be replaced with the transfer box out and leaving the gearbox in situ ??

bob

hi guys

i have looked under and i would say the drips hanging on the under tubular frame is the colour of tranmission fluid; ie redish, so do i conclude from that that it is probably the gearbox shaft oil seal !! and if so can this be done with gearbox in place and just transfer box out <,,,,??

bob

The book time for removing and replacing the transfer box (41.20.25/99) is 2.2 hours and the input shaft oil seal replacement (41.20.50/01) is an additional 0.1 hour.

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hi phil

thanks for your in depth explanation and pictures etc; extreemly helpful in now understanding what to expect in time and costings etc

not as big a job as i had feared, but as i am just getting over a fuel injection problem which cost me a total of 2500e several weeks ago and 1100e last week with a crankshaft pulley replacement and associated bits here and there; i was panicking somewhat of another expensive repair; they say it comes in three's so hopefully this is the last for a while

thanks again for the help

and to everyone, thanks for all your input

bob

that appears to be some level of forethought and planning by the Gbox designers there........ which is unusual  There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
KIA E-Niro 4+
2021 Discovery 5 D300 MHEV commercial