Auto gearbox fluid change ??

[Lord Sladacre]

My December 2003 S - Type has a six speed auto box coupled to the V6 3.0 litre engine. The car currently has 78 k  miles and i have owned her since December 2017, at which point she had 61 k miles. At what mileage should i change the ATF auto fluid in the gearbox? i have heard rumour that it is a "sealed for life" unit, which is concerning - as it surely under goes wear through heat in long term operation. Any advice would be gratefully received. Many thanks, Dominic  

[JOE-DOT-COM]

hi

Its well over due, ZF recomend 60k or 10 years, at 17 years old well worth doing

did mine a few years ago, recomend using genuine zf parts and Oil

you can get kits off eBay which include, new pan(filter), new bolts(larger heads improved), 7 liters of zf lifeguar 6, mechatronics sleeve(prone to leaking)

cheers

Joe