Before you guys say anything, I have searched this. I drive a 91 4Runner, 3.0, 5 speed, and of course, 4x4. I have recently noticed that at 60 miles an hour, there is a pretty hefty shake, that continues up to 65. Now, as soon as I reach 65, the shaking stops, and I can control the truck better. I read a thread about doing a mod on the steering rack bushings, but I don't know if I have a rack & pinion steering system or not ( I'm still learning a lot about this stuff). Let me know what you guys think.

 

tires out of balance, u joints, wheel bearings, maybe.

 

Mine used to do the same thing, try replacing the idler arm.

 

you do not have rack-and-pinion.

check wheel balance, like mentioned, and maybe the steering dampener (if equipped).

 

You may have picked up some mud on the inside of the rim, causing a wheel to go out of balance. A wheel weight may have fallen off too.

 

my truck did that when the rim was caked with mud inside the rim and it was pretty bad

 

Get the wheels balanced, should take care of the shakes. These older wheels tend to have wheel weights in abundance, no big deal to sling one off.

 

I recently had the tires mounted on some different wheels( I call them rally wheels, but I don't know if that's correct or not) and they supposedly balanced them then, but you never know I guess. Thanks for the tips guys, its appreciated. Abe, how do I find out if I have a steering dampener? Is that something that came factory, or is it an after-market thing? Thanks again guys, and as before, I am still learning a lot about these trucks.

 

The steering dampner is that thing that looks like a shock only its mounted horizontal on the center of the steering components under the truck. Factory item.

 

Thanks man. Im guessing I should look for general signs of wear and tear? weather here has been crappy all day long, so I may check it out tomorrow. Thanks again.

 

also someone mention your idler arm you dont have to replace the whole thing toyota sells bushings for it so you can rebuild it i had to when i bought my runner

 

Thanks Mudd Duck, I'll look into that. seems like most of this stuff is pretty easy to fix, right? or am I totally off-track on some of it?

 

These trucks are easy to fix once you understand their idiosyncrasies.

So by your post above, the shake started after you had your tires mounted on those new wheels? Out of balance wheel, bubble in the tire plies (IE time for new tires), or a bent rim would be where I would start. Rotate the tires from front to rear one side at a time and see if the shake changes at all, and you may find your culprit wheel...

 

i agree with "thedanned" i was just throwin' that out there seems like alot of people buy the whole part when they could rebuild the one they have but your prob is (imo) somethin to do with those wheels or tires or it could be a steering component you can always just climb under there and look it all over good make sure there's no excessive wear

 

Thanks guys. I will do some checking on it in a few minutes. I will try the tire rotation, and see if that works or not.