96 Lexus lx450 rpm change

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Sep 22, 2013
Hello all I recently bought a 96 lx450 with about 126,000 miles. The 80 series is new to me and have only had it for about 2 weeks now. I drove the truck home for the first time on the highway at about 75 mph for 2 hours an the rpm range was between 2200 and 2600 RPMs. I drove the truck again today and for some reason at 65 mph the truck was at 2900 to 3200 RPMs. I don't understand why this would change. The only thing that changed was that I played around with some of the features such as lockers, low range, and the gears on the transmission. Do I need to replace transmission fluids or what. Any ideas would be greatly appreciated. Thanks
didnt by chance turn on the overdrive or power button did ya?
thats good for a 500 rpm bump
maybe its on and a dash bulb is out making it less obvious
check the spring that provides tension to the brake pedal, mine had fallen off and I would have RPM spikes
You're either not getting 4th gear, or you are but the torque converter isn't locking once you're there. First thing to do is figure out which it is.

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