I have a 2013 Lexus GX 460 with 92K miles. I took it in for its 90K service to an independent mechanic and they want to change the transmission fluid along with the front and rear differential fluid. I looked at the maintenance schedule in the book and it does not say anything about changing the transmission fluid if you are not towing anything. Should I listen to this mechanic and change the fluid or should I take it somewhere else?
It would be a smart idea to have those fluids changed out with 90K miles.
Yes you should, in fact you are a little bit overdue. Do a drain and fill, don't flush it.
Yes, have them changed (drain and fill along with filter change). If the manual does not specify interval changes for the ATF, then a good interval that Scotty has mentioned is every 30,000-70,000 miles. On my vehicles I aim for every 40,000-50,000 miles. Transmission fluid changes are much cheaper than a new transmission. If a vehicle has a weaker transmission from the factory (you don’t!), then change closer to every 30,000 miles.
See our ATF sticky under FAQ for more insight: knowledge is power
https://carkiller.com/scottykilmer/qa/atf/
