I have a 1992 ford f150 regular cab i wanted to see if somebody could help me figure out the problem. I have just had my tires and wheels rebalanced . Have not rotated yet. Can not rotate tires for another 250miles tires only have 8750 miles on them and rotated every 5,000 miles. I have 6 farely new ranch 5,000 shocks 4 on the front 2 on the rear. Does anybody have an idea why the truck would be riding so rough. It started tuesday of this week.

 

Has the weight load changed? (compressed suspension rougher ride).

 

No it has not . Other than puting a push gaurd on the front and pumping up front tires a little bit . Nothing else has been done.

 

I saw you pic that why I ask that question Did this start after the re-balancing of the tires?

 

It actually started the day before (tuesday) had the tires rebalanced yesterday . All new weights on the tires inside and out of the tire

 

I was thinking you threw a weight but with no change after the re-balancing...

 

I thought the samething . Tire shop didnot say anything about the weights whether or not i slung one or not

 

At what pressure do you think i should have my front tires at . Making sure we are on same thinking page

The other thing i have noticed that it only has a rough ride when the truck goes under 1500rpm's

 

Grabbing a few straws here.. have you adjusted your shocks in any way? were the wheels machine spin balanced after this started and did they use clip-on weights or glue/stick-on (Ive seen both used)? that said, could have lost a weight on a tire both times. over/under inflated tires, out of round tires (more common in recaps but can happen), seized shock, worn rubber (cab mount, Stabilizer bar bushings and end-links..)

hope some of these help

 

I was thinking/typing while you were posting... the 1500 rpm is that steady speed, accelerating, or decelerating? What is the recommended tire pressure for your tires?