I have a 1994 ford ranger 4x4 that I just put on and 35's and when I get to 35 mph it shakes really bad. Anyone know what the problem is. Have been told that I need a steering stabilizer.

 

Was it doing this Before you upsized the tires???
Do you feel the vibration more in the steering wheel, or seat, more so on the passenger or drivers side.????
Were the tires match mounted, then road force balanced????
Were any suspension changes made & if so was alignment checked afterward???

 

Do you have a limited slip differential? If so, check the spider gear clearances. The extra tire load can make the limited slip differential act strange at times.

 

when i looked at the title, i was gonna say maybe the ujoint or wheel bearing> since that JUST happened to me a few days ago, my ujoint was pretty much falling apart, but since it just happenend after u changed the wheels, not sure.

 

The drive-shaft may have be 180 out from its original position with respect to the yoke or input shaft when the u-joint was replaced. Try rotating the drive-shaft 180 degrees at the differential joke and see if the vibration goes away. if the vibration is worse, then you'll need to re-balance the drive-shaft. I've heard that replacing the 3.5" steel drive-shaft with a 4.0" aluminum drive shaft is the way to go...if you have the money.

 

I have more than once had to have new tires rebalanced because they were not correctly done the first time and also have run into tires that we're not round, if all you changed was the tires start with the tires.....

Edit, my F350 started shaking at around 30mph after a new set of tires was put on the truck and ended up being a completely out of round tire.... It was visibly out of round when spinning the tire on the truck on it my case.

 

I agree with Twigsv10 ,,, if all you changed was the tires then start with the tires,,, i had same problem once and it was the steel belt in tire coming apart and it was a new tire with factory default

 

Assuming that accurate tire balance or tire quality is not the issue, then:

Oversize tires are also much heaver than stock. If any of the front suspension components (ball joints, etc.) are even slightly worn, then the abnormal clearances will allow the extra heavy tire to wobble around more than lighter stock tires. If worn suspension components are the cause, then a steering stabilizer will not fix it.

So have all the front end components checked for wear and also have the alignment checked. It's a fact: big heavy tires will accelerate front suspension wear. You'll also need to rotate the tires religiously in the future to even out the wear.

I can always tell when my own tires need rotating because they begin to wobble a bit. You wouldn't think that rotating the tires would cure it, but it works on my lifted truck.

 

reddog99 is correct. I had to replace the shock-absorber rubber mounts with urethane mounts to offset the effect of the larger tires on my friends '99 F250 Super Duty. The larger tire effects were vibration and skidding around bumpy corners.

 

Another thing about properly balanced tires...There should only be one or a group of weights on the outside and the inside of the rim. If you see multiple weights or groups of weights on the inside or the outside of the rim, the tire was not balanced correctly. Groups of weights should be close if not touching each other. If they are even an inch apart, the wheel needs to be rebalanced...properly.