Good Day Ladies and Gents.

Im a newby so please be gentle.

Im a brit based the good old UAE and bought a 2009 SV8 3 months ago with 68,000 miles on the clock. I new when I bought it, it needed new engine and transmission mounts (Vibration at 70 mph). Had these changed at my local specialist 2 weeks ago and afterwards the car was like new. The garage also recommended diff oil change as it was was wining slightly upto 20 mph.

So 2 days ago they dropped the diff and changed the oil using oil from the Jaguar dealership here. Also got balancing and alignment completed. Returned the car the same day and now I have a few more problems;

1) Diff wining is alot louder
2) Something is banging/clunking on the rear end from standing start only (50% throttle position)
3) Vibration and groaning from rear end.gradually worse from 20 - 70mph
4) Park Break in not working - Red and amber warnings on dash
5) No cruise control

They took the car in yesterday and identified it need a new diff and e break actuator.

I am struggling to understand how the diff has suddenly got so much worse and the other associated problems have developed.

If anyone has any suggestions to the problems, much appreciated.

Thank you

Russ

 

Russ sooo many things come into play here?
was it serviced to the right level?
with the right gear oil?
or even serviced at all?
Don't laugh, My sister lost a diff after the mechanic failed to re fill her diff after a half shaft change, and she drove it 30mi.
Got to do it yourself, then you know for sure. Good luck

 

Take it back. Complain (nicely but firmly).

 

The diffs in the 4.2L SC are a known issue. I believe they had contamination in the fluid from the factory that leads to premature failure. The diff design was updated and the replacement is expensive (~$7k USD) because it requires updated axles. Typically the diff will get louder and start leaking. It doesn't sound like they will service the old diffs. They always recommend replacement.