2:29 am
I've been trying to chase down a vibration for a while. So far I've:
-rebuilt the front end
-put on new tie rod ends
-balanced the tires
-put on new bushings
-swapped in my spare driveline
It's still there. It's not death wobble, but man is it annoying. It starts at about 35 and mostly goes away by 45. I'm thinking out of round tire? How do I check that? Anything else I should check?
2:41 am
May 4, 2004
Offline Your 4Runner is just telling you its time to move the 4Runner body to the F350 frame.
I would check your steering box for any play. My dad had a high mileage '76 Datsun pickup with chronic front end vibrations. We narrowed it down to the steering box and would adjust it now and then. Look for a stud with a screwdriver slot or allen head socket with a lock nut. You can loosen the locknut and make small adjustments to the stud. Usually turning it clockwise will tighten up the steering. Be careful not to tighten it too much or you'll reduce/eliminate the normal return-to-center after a turn and wear out the internal gear prematurely. I've had to do this on my Jeep too.
4:05 am
February 5, 2003
Offline have you moved tires around one at a time?
is it a wobble, or a vibration?
Closed Mondays.
1:59 pm
"Dan-H" wrote: is it a wobble, or a vibration?
It's a vibration. If I drive at 35 for too long, it makes my hands numb. 
3:49 pm
May 4, 2004
Offline Can you hear the vibration as well as feel it?
Have you checked your motor/tranny/transmission mounts?
Exhaust hitting on anything?
Got a body panel or heat shield loose?
Is it rpm related or vehicle speed related? Does it always happen at 35 mph, regardless of what gear you're in?
5:58 pm
February 5, 2003
Offline try removing the rear drive shaft and drive it in two-wheel front to rule out the entire rear drive line.
I'd swap all 4 tires with anything you know to be smooth rolling and rule out the tires.
does it vibrate with the engine off coasting down hill through the speed range?
Closed Mondays.
12:25 am
I've never tried costing with the engine off but it vibrates in neutral. It's always at 35ish. RPMs don't matter. Motor mounts are new, heavy duty. I don't necessarily hear the vibration but I can hear plenty of things rattling around the cab. It's an awful solid feeling vibration to be exhaust or heat shield. I'll try the steering box, front drive line, and the tires.
12:29 am
February 5, 2003
Offline you have unlocking hubs don't you? If so I doubt its the front driveline unless one of the hubs isn't unlocking.
Closed Mondays.
3:10 am
"Dan-H" wrote: you have unlocking hubs don't you? If so I doubt its the front driveline unless one of the hubs isn't unlocking.
Yeah, I meant I would drive it on only the front driveline (no rear) sometimes my fingers just don't type it that way. I am sure my hubs are coming out though which does rule out another possible cause.
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