Oil Leak from Jaguar XKR 4.0 With the Mercedes 722 600 Gearbox

If one day you see that oil has been leaking from the gearbox on your XKR 4.0 it is likely that this is from the in-line electrical connector on the front right hand corner of the transmission. This will be due to ‘O’ ring failure. When doing this job I would also treat the gearbox to a filter and oil change if not done already. The image below shows the new replacement connector JLM21109 with O rings which were the cause of the leak on the old part.

In Line Connector JLM21109

READ MORE BELOW how this was replaced on Ian’s 1999 XKR 4.0 with only 43,000 miles on the clock.

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