My 2006 LR3 (w 170,000 miles) is having a transmission issue. Issue is only when transmission is warmed up. It is slow to re-engage overdrive after an uphill acceleration or after passing. Is this from low fluid or do I need to take it for a transmission flush, fill and filter change.

 

...what is your determination based on? How do you know the shift points aren't normal, I mean?

 

And you are not in sport mode? (just want to make sure). Is the TC locking? With not much info, I tend to think it would be a solenoid issue. Has the trans ever been serviced?

 

The shifting is controlled by the engine ECU. It will down shift when there is a load on the engine or delay upshift/lock converter based upon that load. As I kept adding gear and larger high drag items on the roof rack on my 2006, I found that the thing would not lock up at all at 70 mph but did fine at 65-67. Seems the load was reduced just enough to let it lock up. I would often move to manual mode and up shift to get the rpm back down to 2,000 at 70 mph, but now, I just drive slower and let it lock up when it wants.

I did find that new oil change, new air filter and cleaning the throttle body and Mass Air Sensor helped. Resetting the adaptation for the engine and transmission may help.

Jeff

General Disclaimer: I might be wrong