My '01 Screw cups its General Grabbers, too. I have rotated my tires reasonably, and had it aligned at the dealer, and at 37k I think it is still cupping them. It irritates me that these suspensions wear tires like this. My '90 Ranger does not do this. It has never been aligned in 205,000 miles yet wears tires perfectly, i.e 89k on the original Firestones, 80k on the 2nd set, and 36k and counting on the 3rd set. I admit that I am a conservative driver with a lot of highway miles, but the driving style is comparable between the two trucks, so I had hoped that the tire wear would be comparable. Oh, well, what can you do?

SM

 

It has been a while since I drove a 4X4 but cupping was always a problem. I have one suggestion for you though. At a local tire dealer they had a balancing system called an accu-balance. It used two spinning carbide blades and a pressure wheel to true the outside edges of your tires. The result of doing this was unbelievable. I paid about $60.00 for a life time balance. Up from the usual $40.00 . The only problem is the tire store I used no longer has that equipment and since I no longer drive a 4X4 I haven't felt the necessity. For the record I do have a little cupping @ 27k and I rotate and balance about every 8K. You may also want to look in to installing tubular balancers. They are not cheap but they will make your tires ride and last longer.

 

Have 22,000 miles on stock Goodyears. Have them rotated every 5k miles, seems to be doing the job, no problems yet.

 

I have the same problem at 40,000 miles on my SCrew. The front drivers side cupped so bad, and so fast, that I thought I had a wheel bearing going. The dealer told me there was nothing they could do, and simply rotated them off to the back. So I will wear these tires down and when my new ones come, have the enrire front end gone through before replacement. I just makes me so mad that you spend a big chunk of change to have these problems come up and not even the dealer knows what the hell is going on. Its typical.

 

2 idler arms replaced , ford knows they have a problem, fix is just keep replacing them untill you get a good one. My tires cupped so bad the dealer replaced them at 13k miles, idler was scary loose. When they replace an idler they do not automatically perform an alignment under warantee, make sure they do one! Get the printout for proof!

 

In the fall of 2000 I had the same problem on my '01 Supercrew which I purchased in June of 2000. Same tires, same wear, same line of bull from the dealer. I told the dealer I was going to take it and have a computer analysis of the alignment done to see which one of us was right. So I went to my local goodyear dealer who does free computer alignment analysis. The manager came out and said "Oh, you have a Ford!!! That explains the wear. You will have to go to the dedicated alignment shop to get this problem fixed and he gave me a name and address. So I went over to see the alignment experts and when I tell the guy my problem he nods and says you must have a Ford. So he takes me out and shows me that the factory wheel hardware alignment only allows for adjustment in...Sorry my memorys failing me now...one or two directions and most cars have an additional adjustment direction. He shows me how Ford in their infinite wisdom put a non adjustable plate in for the final adjustment. He explains that Ford gets away with this by labeling the normal operating range for this adjustment so broadly that without any adjustment it will always fall within the range. The problem he explains is that you have - yes you guessed it excessive tire wear!!!! So he explains that If I want they can replace the four adjustors with one which will be adjustable in all directions and then align the tires correctly rather than to Fords loosey Goosey standard. The cost for all four wheels with alignment was around $220. He did it in less than an hour. I asked him if it was his truck would he go to the expense and he said if your on a lease don't do it, but if you plan to own your truck for more than 5 years you will easily earn back the cost by not having to replace your tires as often. And guess what, today I have perfectly even wear on every tire whether I rotate them or not. Moral of the story. Go see an alignment specialist and ask them to show you what I'm talking about. It can be asily seen from inside the engine compartment. Maybe I can post a pic soon which shows what the new hardware looks like. Hope this helps you guys and gals to better understand why you all have the same problem.

Best Wishes and Happy Trails