I have a jeep patriot 2012 which uses a CVT transmission. recently I have been going on a lot of long road trips. I noticed that when I first start to drive the car, there is no gears slipping. Even when I reached the interstate, the car would drive fine, when the engine temperature starts to heat up, the car will also drive fine. It is only when I start reaching the 6-8th hour drive on the road when I feel the car start to lose power.
For example, one of the indicators for gear slippage would be low transmission fluid, but when I went to the mechanic, they told me that the fluid is full. I used my car to drive short distances too and that does not seem to have any problems. It is only when I drive for a very long period of time that the car would start messing up.
Whenever I am at a stop light after driving for maybe 8 hours, in 1st gear the car would struggle to accelerate despite the rpm going up around 3k rpm. This would also happen during reverse.
I would just like to know if there is any other components that might cause the gear to slip because the mechanic said that the fluid seems to be adequate, and there are no check engine lights or anything on.