I am new to the foruma and to FJ40's. I recieved a stock 72 FJ40 from my uncle a few months back. I have done a few things to make me feel more in control of the machine. I put front and rear disks on it and am so happy with the outcome. I have changed all of the fluids becuase it sat for a long while. I also changed the seals in the tranfercase as a precaution. Since driving it more I have noticed a vibraion that feels like it is coming from the tranny, engine area. I first thought it could be drivelines but checked it out sitting still in the garage. While reving the engine up a vibration become very apparent at aound 3/4 of full rpm range. It is an F enige, never been torn into before with high miles but not known how many for sure. I have not done a compression check yet but it runs very well and smokes little to none. I have no knowledge on these engines but am alarmed by the vibration and do not want to do any damage by driving it this way. Are these engines known to have any corks like this or do you have any ideas as to where i should start looking first. I appretiate all your ideas and time. Also I have spent countless hours reading so many wonderfull theads and think this site is great. Although my wife is already wishing I had not found it. Thanks again and I look forward to your thoughts
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