So what is the consensus on changing fluids? I have a lifted '12 JK that is my daily driver, but does see some wheeling. I have 31.5k miles and considering changing fluids in both diffs, transfer case, and a trans flush.

 

Owners manual scheduled maintenance is a good place to start. What kind of wheeling do you do? Rocks, mud, water? Manual or auto trans?

 

I don't take it mudding, but it does see some on the ORV trails and FSR's. I'm just getting conflicting info.

 

I did not change out fluid in the auto tranny or t-case until 60k. I have a cooler so the tranny fluid was still looking (and smelling) pretty good. Heat is a huge factor so it depends on the environment you operate in.

I changed out the differential fluid around 30k. Probably did not need to but wanted a look at the gears.

The owners manual is the guideline but it depends also on what you put the Jeep through.

 

I changed all of them (F/R diffs, transfer case, manual transmission) on my 2012 at around 22K miles.

I did it all myself so it was cheaper than my peace of mind.

If you are taking it to the dealer and you don't mud it or run it through deep water (diff can get water inside) then stick to the schedule.

 

Thank you, gentlemen.