2000 Toyota 4Runner SR5 Sport Utility 4-Door 3.4L 146K

For sale is one of our 2000 Toyota 4runner. I just drove it from New Hampshire to Texas. Prior to my trip, did the following: timing belt, ater pump, rankseal, ydraulic tensioner (Aisin), ulleys, adiator, thermostat, pper radiator hose, ower radiator hose, ransmission flush with filter, AF sensor (Denso) and upstream O2 sensor (Denso). The front rotors and brakes were changed couple of weeks ago because the rotors on it got warped during the trip. About a third of the way into my trip, t seems the transmission started slipping when going from second to third gear or so. The transmission fluid is fine and it's neither low nor high level wise. I have been driving it as is since then but it's certainly not getting better. As shown in the pictures, he bumpers are rusty. The frame is absolutely solid. The tires are practically new. There are no leaks or any kind of light. I also got the rear bumper center bar in chrome. I just want to state again, he transmission slips. Please feel free to ask any question. Thanks.