Just wanted to add my experience with a vibration that started at about 65 mph. Had the wheels rebalanced and it lessened the vibration a little but it was constant after 65 mph instead of stopping at 75 mph. Head scratcher.
Then I replaced the rotors on this 01 since it's about 19 years old. It definitely helped with the braking but did nothing for the vibration.
Luckily I have a good driveline shop nearby with a guy who has 40 years of experience who checked it out after I removed it and took it down to him. Turns out the guy who had the rig before me towed it behind a motorhome so he would drop the driveshaft when he did that. Dumb kid would literally drop the shaft on the ground which caused a .040 bow and 3 oz out of balance. I was advised to get a new one rather than try to fix that one because the back end flange was also beat up and needed replacing.
So my little money pit T4R bit me again (new engine and lots of other parts already replaced). I went with a
recommended shop in Texas who should have the shaft with OE Toyota U-Joints already installed so it will be ready for me to put in the rig when it gets here. I just hope the vibration problem didn't cause a problem in the auto trans. It wasn't that bad; just bad enough to annoy me.
Assuming the trans and differential are okay; I should have a like new 01 T4R soon even if it is only a 2wd. Now to see what I can do about a leaking seal on the right rear...
These are really great rigs but anyone who thinks they can buy a 20 year old T4R for $4-5k and just drive it without putting some time and money into it should think about buying a new one instead. Then again I'll have under $9k into it when done and gone through which sure beats $40k for a new one. More if bought with payments. A lot more.
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