transmission problem on 2001 Lexus LS430

this car is not driven that often, it only has 85000 miles, only 12000 miles within the last three years. this morning,after starting the vehicle and backing it out of the garage,it was put in drive,and given some gas ,but it was very hard pulling foward. I let the car set for approx.1 hour,and drove it with no problem. the car shifted just fine,just like it always has. what caused it to pull hard?

Asked by for the 2001 Lexus LS430
There are so many things that can cause this type of problem, so the best thing to do is to scan the on board Computers. Do you have a Check Engine Light on?

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