today we got the bong for , transmission component slipping, after a reset its straight back again

P0894 rear diff

anyone have any idea what the issue may be ?

iid tool live values

are:-
actual locking torque ON
clutch over temp events 0
clutch temp 22
motor over temp events 0
motor temp 27
percent travel left on clutch 70
diff control override status NORMAL
motor brake request status INACTIVE
motor brake status INACTIVE
open diff override status ACTIVE
sump temp 24
slip speed 0
sump overtemp event count 0
torque limit 2.5kN
torque setpoint ON

anyone have any idea what the issue may be from that info?

thanks

ps I'm hoping it just needs an oil change

eta car was stationary when reading were taken

I'll see if I can get the info out of mine for comparison.

[Edit: Just checked - pretty much the same as yours, even down to the clutch life left at 70%! My torque limit is given in lb/f at 1874 which converts to 2.54kN - pretty much the same.

As far as I can tell there isn't anything wrong with your data there.]

Thanks for going to that effort
If no one else has any input , I reckon an oil change is in order to see if that sorts it out
Wonder if ctc has seen this before?
Any input welcome
Thanks again

Can i just ask how many miles you have on it

sure just coming up to 83000

I would try the oil change 1st just got to 73000 on mine all going well in that area . just sitting a bit wonky of late but seems to have sorted its self out for now ............................

Has your car got the electronic diff lock?If it has can be that the difflock needs a cleanout. 2012 TDV8 Vogue SE 4.4

Yes it has the ediff
Can you explain further re clean out
Guess you mean oil change?

No not oil change!
The e-actuator that sits on top of the diff can get contaminated with mud or water.It must be removed(not a nice job on a D3) and cleaned out.No rocket science just difficult to get to.All D3/4,Sport and FFRR here in RSA has them standard and your problem sounds familiar!!The slip is in the actuator. 2012 TDV8 Vogue SE 4.4

Ok thanks
I'll have good poke about once the fluids arrive
Going to do tx box, both diffs and get it booked in for gbox oil service at zf specialist

 2012 TDV8 Vogue SE 4.4

well I have changed the rear diff oil (quite emusified) and transfer box oil (very clean) and now need a 14mm allen key to do the front diff

the slipping component code p0894 has not came back up

BUT I now have P186 A 00

which is diff lock up actuator brake open circuit , so looks like I need to get under again and check any connections I may have disturbed

(once my back sorts itself out I'm getting too old for scrabbling about underneath cars )

After unplugging and plugging back in the connector to the motor on the rear diff and giving the housing a few taps with a hammer , the situation remains , open circuit to motor brake , so without a pit or lift it looks impossible to sort out as it looks too tight to get the assembly out , a job for another time me thinks or it could just end up being an open diff for a while yet

Got to say after the gearbox oil has been changed and new filter and plastic pan fitted theres a definite improvement to the slickness of changes up and down the box.
Suspect its the first time its been done at 84k

I had this problem last year and it was the actuator motor failure, do you gat a cascade of failures coming up on you IID tool?
Stuff like Terrain Response failure and traction control failure from the missing signal from the rear diff. 2008 MY Supercharged
Rimini Red / Jet
four zone climate
remote park heater
and no ugly kid windows.
magnus satis quod turpis satis