I just Installed the Mickey Thomson 39"x15"x16.5" on my truck. I drove the truck and there is a terrible jumping vibration on the drivers side only sometimes, when going about 35mph. If I was going faster and that happened I would definately crash. Im wondering if Its because of the alignment ? Do I need a steering stableizer ? Are the tires out of balance ? Im not sure but Its very scary Any suggestions would help - please pass the word on to . Thank you, Tim

 

sorry to hear about your tires. it sounds like the tires are out of balance or out of round. did you get them balanced? if you got them balanced then it could be that they are out of round. if thats the case i would see if the place you bought it from will take the tire back or you can look into getting them made round. i have read some tire shops do this by spinning the tire and re-cutting the tire round. i don't know how much it is though or where they perform this procedure.

 

95 250 i have the same truck if its the heavy duty 250 i have 39.13.50.16.5s i dont get that at all.how did they balance you tires?the used equal in mine and it worked out good.i went to a place where they do big rigsso there used to doing big tires.some small tire shops dont know who to balance the bigger tires.

 

My truck looks just like yours -I called a truck center today and they said if the tires will fit on their machine they will balance them for $18.00 each ( this is a semi truck center in the Chicago area where I live) Im hoping this is the problem - Who did you get to align your truck after the lift kits were installed? They are telling me they wont align it because its to high even with the stock wheels on it. I did find a local shop who will align it for an hourly rate somewhere between $80.00- $200.00 -Thanks,Tim PS : check out my gallery for a current picture

 

Death Wobble as it is commonly known as is a beast to get rid of and get be very tiring....I actually just got done battling it myself on my trail rig.

the culprit could be anything from loose steering arms to bad ball joints to misalignment to out of roud/unblanaced tires to bad track bar bushing.

you might check all those first before you proceed on to any money spending. i found that a lot of times on a truck that is almost 10 years old the track bar bushings have gone and causes the axle to wobble which instigates DW

hope i could help

-cutts-

 

YO Cutts, What is the track bar bushings. Where are they located. Im going tommorow morning to a shop (alignment shop - a freind of my buddys ) And they are going to align my truck and balance my tires. Im sure they will know if somthing is worn out or broken. I appreciate your reply. Please respond to my question -What is the track bar bushings ? Thanks , Tim

 

While your truck is at the alignment shop, have them look at upper and lower ball joints on both sides and at the axle pivot bushings. If any of these items are worn out on your IFS front end, you can get the wobble and vibration you describe. Also look at the front spring eye bushings and upper front shackle bushing. The shackle bushing is probably worn out by now since it takes a beating.

When you put large tires on a truck, everything has to be fairly tight and the tires have to be round and balanced if you expect a smooth ride on pavement.

I'm assuming that your front end is a Dana 50 IFS. If so, there is no track bar, but you do have two tie rod ends and a drag link joint that can wear out. Fortunately these have grease fittings in the '95 F-250 trucks.

Lou Braun

 

Lou is right! i didn't pay attention to the fact that your front is a ttb and there is no trac bar! scratch that idea!

-cutts-

 

I ran those same tires on the front of my 92 Bronco for 6 years. They are heavy wide tires and thus will exagerate any loose component's symtoms. I found I had to replace my idler arm every 20k miles and the ball joints and tie rod about every 50k. Also, MT tires have been known to be out of round a lot even fresh from the factory. Have that checked and get a replacement if it is egg shaped. I had to do that with one of mine.

 

OK fellas heres the scoop - I went in today for an alignment and to have the 39's balanced. I had to put the small tires back on, They found a bad U- joint on the drivers side front axle. They also said the axle pivot bushings were worn. I asked them to show me, and naturally they couldnt, they said its Impossible to see them although they were out of wack. So i told them to replace the u-joint and to balance the tires. As they were balancing the front drivers side - they noticed somthing inside the tire moving around and it would change the balance point every time you spin it. So they broke it down and found some fix o flat type dried up rubber in there. And that was my main problem. They ordered me the bushings ( $8.00 ea) and im taking it back for them to install the bushings and do the proper alignment. Today he just eyeballed the alignment. The truck now drives 99% better with no shimmy or bouncing. I appreciate all your comments -TAHNK YOU GUYS -Tim

 

awesome! thats what I like to hear.

 

awesome man. you should go back and ask them to drop in 8oz or so of Equal

-cutts-

 

I have no idea what equal is. I've never heard of it other then sugar. Im very happy so far with my truck and also with all the help you guys are willing to go out of your way to give me. Thanks Tim

 

LOL yeah when I first heard of equal I thought of the sugar too! Makes your tires ride sweet though. LOL

 

Tim, Equal is a powder used to balance these big tires. Lead weights on the rim often won't do the trick. When they put the Equal powder in there it gets thrown around as you drive. The centrifugal force causes the powder to fill areas of the tire that are out of balance. Basically it will rebalance your tire everytime you drive. It's a sweet setup. It shouldn't cost too much to do . . . plus you don't have to worry about your lead weights falling off as you drive.