If real alot of post that talk about road force balancing or alignment or something. Can someone explain what this is exactly?
thanks

 

check this page out http://www.tirerack.com/tires/tirete...uniformity.jsp

 

Real high overview on road-force.

Most tires have sidewalls that have a "weak spot" somewhere...a spot that will 'give' or 'flex' more than the rest of the sidewall. As the wheel rolls and it comes up on the "weak spot".... the sidewall flexes more than it allready has flexed. As it rolls off of this "weak spot", the "rebound" affect pushes the sidewall back up. This could cause a vibration that is not an out-of-balance condition.

 

I got my rear tires roadforce balanced on the Hunter GSP9700.
For a 99 truck however.
60,000 km's on the tires.

But I am curious, were any of you guys present during the process.
How much roadforce has been applied to your tires.
(Or whatever that number means.)
As you can see on the picture mine was 5.5 Kg, about 12 Lbs.
I assume that's pounds on a Hunter in America.
The other tire read 2.0 Kg (4.4 Lbs)



And here is one of my rims runout pictures.

 

On an '04+ F150, I think the max roadforce Ford allows in one of those vibration TSBs is like 22 lbs for 17" tires and 24-26 lbs for 18" tires. When I roadforce balanced mine, they all hovered around 20-22 lbs.

Edited to add: As quoted from TSB 04-25-7:

Perform the road force measurement immediately after driving the vehicle. Remove the wheel cover and wheel assembly. Measure the road force variation of all four tires. Measure and mark the tire HIGH road force variation point (R1H) on all four tires prior to dismounting them from the road force measurement equipment. Balance as required to 0.35 oz (10g) or less of imbalance (check both two-plane and static). If any wheel assembly measures more than the values listed in the chart below for R1H then proceed to Step 5. If less than the values listed, proceed to Step 6.

Tire Type R1H
P Metric Tires 25 lbs.
LT Tires 25 lbs.

 

Not to wake up an old thread, but I'd been griping about vibrations in my truck for a while. I was having a difficult time getting the NVH TSB done because my tires were "bad". As we all knew (me and two dealers) if we rotated the tires. the truck vibrated so badly that soda left in the in the center console for 50 miles would explode upon opening. So I had a truck that was running smooth, but the tires could not be rotated.

I'm getting very near my factory warranty mileage limit, so I finally decided to just pay for a Roadforce balance myself and break the log jam with "nothing we can do".

Well, long story short, it paid off big time. my tires measured 26, 29, 25 and 34 on the roadforce test machine, I think that was after the rebalance and reindex.

The dealer "found something from Ford" and apparently I'm getting four new tires and the TSB that involves a dampner kit is on order. I couldn't be happier to get this resolved on an otherwise flawless vehicle.

The dealer has been pretty decent about the whole thing, it just took me making the time and being willing to meet them halfway (pay for the balance to get things started) and then doing the required social engineering, being calm and rational and leaving the truck for a couple days.

FWIW - they did not charge me for the roadforce balance.

 

Not to wake up an old thread, but I'd been griping about vibrations in my truck for a while. I was having a difficult time getting the NVH TSB done because my tires were "bad". As we all knew (me and two dealers) if we rotated the tires. the truck vibrated so badly that soda left in the in the center console for 50 miles would explode upon opening. So I had a truck that was running smooth, but the tires could not be rotated.

I'm getting very near my factory warranty mileage limit, so I finally decided to just pay for a Roadforce balance myself and break the log jam with "nothing we can do".

Well, long story short, it paid off big time. my tires measured 26, 29, 25 and 34 on the roadforce test machine, I think that was after the rebalance and reindex.

The dealer "found something from Ford" and apparently I'm getting four new tires and the TSB that involves a dampner kit is on order. I couldn't be happier to get this resolved on an otherwise flawless vehicle.

The dealer has been pretty decent about the whole thing, it just took me making the time and being willing to meet them halfway (pay for the balance to get things started) and then doing the required social engineering, being calm and rational and leaving the truck for a couple days.

FWIW - they did not charge me for the roadforce balance.

 

Ford has increased the base warranty coverage of tires for abnormal wear and NVH concerns on '04 and '05 model year F150s from 12/12 to 3/36. You'll get a recall letter sometime later this month or next month for it.

 

PbFOOT
A new set of FREE tires from Ford sounds like a happy ending!

 

After the Firestone Tire fiasco you would think Ford has learned its lesson by now. Money is the bottom line not safty.

 

This has nothing to do with tires it's the suspension. I have aftermarket tires that spec out on the hunter machine at 20-18 now that is pretty good but I still get a nibble. Ford says 26 for 18" wheels but they need 15# My stock wheels and tires are at 15 or below and I get no nibble. With the new tires at 20 I get the nibble....dealer blames the tires and lift ( 2" autospring) BS!

 

I agree 100% with hovbuild, it’s not the tires.


I’m going through the same BS he is due to my “after-market” tires and wheels, which BTW spec out on the Hunter Road Force machine UNDER the requirements quoted in the TSB.

I’ve been doing quite a bit of research on tires, balancing, and Road Forcing. Indexing the high point of the radial run-out of a tire to the low point of the wheel is a common practice, it makes sense. What the TSB calls for in addition to that is matching the run-out in the tire/wheel assembly to the hubs on the truck. This IS NOT a standard tire/wheel mounting procedure. As part of my research, I’ve checked with every tire dealer in my town, and none of them will/do perform the final steps in TSB T42507. So if you have this problem, you’re now married to your Ford Dealer for as long as you own your truck. In my case, no other tire dealer in my town has a GPS9700.

In addition, from talking to a couple tire companies, none recognize the GPS 9700 readings as being a determination that their tires are defective. This IMHO, is a major deal with pretty big implications down the road. For those of you that have this problem and Ford has replaced your tires till you got a set that “works” on your truck (with TSB T42507 applied) guess what’s going to happen when you buy your next set after your warranty expires? Care to take a guess why Ford extended the warranty on their OEM tires to 36K? Because when your OEM tires need to be replaced at 40K or so, and you have to go through 6 tires to find the magic 4, it’s now YOUR problem. At that point it will be you arguing with your tire manufacturer.

I think the bottom line is that this truck is overly sensitive. It places a demand on tires/wheels that exceeds the current tire industry standards for LT tires.

Chuck

 

I have spent lots of money and way too much time trying to get a set of aftermarket wheels and tires not to shake at 65!
Bottom line: Ford has a major problem and when you are off warranty and need new tires GOOD LUCK! There will be a lot of angry beavers driving these trucks.
When the 2006 Lincoln's come out I will demo one and go to my shop and switch tires and run her up on the highway. These 2006's are supposed to have a "new" body mount on the 150 04 frame..

 

 

i have 22" weld Evos' on Falken stz04's and i get a slight nibble as well.... it can't be in the tires/wheels. i had it with stock and my aftermarkets. we had alot of snow up here in Reno NV and one day i had some snow packed in the wheel..... man i thought the thing was going to blow up going down the freeway.... brutal. once the snow cleared she was all good! but a vibration like that from being off balance and the NIBBLE are two different things for sure!