My transmission unit recently failed on my 2005 Jaguar XJ Super V8, and I had it changed (Donor car was a Merc S Class from the same year I guess, as they used the same transmission).
I have put around 3000 miles on the car since the transmission change, and while everything seems to be running perfect, I do have a problem when shifting from Park to Drive when I want to leave my house.
Unless I literally jam my foot against the brake pedal, the transmission jerks heavily and produces a LOUD clicking noise when engaging Drive, otherwise, the shift is smooth (again, provided my foot is pressing down exceptionally hard on the brake pedal).
What could be the reasons for this?