Gearbox oil change and spark plugs

[Dundee18]

Hi just wondering if it is recommended to change the gearbox oil in a Genesis 2015 3.8 rwd sedan? My car has done 63,000 miles but noticed the gearbox isn’t as good as it used to be.

Also wondering what spark plugs the group would recommend please?

Many Thanks for any help. Very much appreciated.
Charlie

PS I searched for any posts about the gearbox oil but could not find any.

 

[5.0KDM]

Gearbox as in the transmission or the differential?

 

[Dundee18]

I was meaning the automatic transmission but whatever other’s experience is best. Thank you

 

[5.0KDM]

Sorry I read it too fast at work. These tranny's are a pain to work on if you don't have a lift. I would go to a transmission shop and get a drain and fill. Do not get a flush or go to a all in one garage aka jiffy lube or kost

 

[Dundee18]

Sorry I read it too fast at work. These tranny's are a pain to work on if you don't have a lift. I would go to a transmission shop and get a drain and fill. Do not get a flush or go to a all in one garage aka jiffy lube or kost

Thank you. Is there a recommendation of how many miles before you do this? Thanks

 

[5.0KDM]

Drain and fill at 60 to 75k. Swap the pan at 100k. These cars have a filter built into the pan.