Originally Posted By: HoosierJeeper
Embarrassingly enough, I haven't changed the trans fluid in my Land Rover LR3. It has a ZF6HP (I think that's the name, it's a 6 speed ZF auto). Up until recently, it was thought to be a lifetime fill, so I never thought about it. Now Land Rover and ZF have changed their tune. I have 160k miles on it and it shifts perfectly, I sense no issues with it. I have a 2000 mile round trip coming up in mid March and was wondering if I should change it, and if so, would it be too risky to change before a trip? Should I do a pan drop or full flush? I was planning on sticking with OEM fluid, but open to other ideas.
Thanks!
A cooler line ATF exchange provides the best exchange of fluid using only a tiny bit more ATF than the transmission holds. Way to go if you use expensive ATF. Look at Amsoil. Its the only ATF I have used in many years.
If your vehicle has a filter than can be changed or wiped clean that should be done and will probably require the pan to be dropped. Not a bad idea as you can wipe the crud from the pan.
Then there is probably a transfer case and front and rear diff. They should be serviced also. But the transmission is the priority.
Do not believe any shop who says that they add a cleaner to the ATF, run it for 20 minutes and then do a flush and the process cleans the transmission filter. It does not.