intofx

Since it was smooth before and slightly after the mods its impossible to rule out the mods being the cause. Returning to stock is the only way to know for sure and have a dealer fix it. If they flagged your truck for having suspension mods you could be sol.

Ricktwuhk

This ^^^

No different than anything that a customer modifies and then has issues. Put it back the way it was and show us the issue when it's logical that what you did might have caused the issue and will likely interfere with our diagnosis.

Many times the dealer will tell you that they will look at it, but charge you $XX.XX IF they cannot find anything or IF they do not get reimbursed by Ford for their discovery process. Makes total sense IF you made modifications such as these.

tmh23

Thanks for all the good insights. Much appreciated!! No way to go back to stock as I sold the wheels and tires. Since it was smooth as glass for a long while after the mods I'm betting it has nothing to do with them but you're right...selling that to the dealer is wasted breath.

I do like the E rated tire diagnosis...makes a lot of sense. In hindsight I would not have put the E rated treads on...oh well. And I agree with the ****ty shocks on this thing...ridiculous bounce and almost dangerous over railroad tracks!!
I'll probably put a new set on the rear to see if that helps and then battle the dealer if needed.
Again. Thanks for all the solid advise!

IMHO...a level spacer and rims are such none issue thing I still think the dealer could have handled it better.

Do you think that a front level actually changes drive shaft angle? I hate math and geometry so I'm no expert here.

vmmvmmm

That's a bummer. I was afraid of something like that happening, so I had the dealer perform the level for me to keep everything under warranty. That's probably less than ideal in the end, and more expensive, but it was peace of mind for me.

Hope you get things figured out.

TimelessR1

I'd get a RoadForce balance done on the tires...and make sure you make sure they do the roadforce part of it. I had a place say ..oh yeah..we Roadforced them...when they didn't! OR I've had it when i push a place they confessed their machine was out of calibration and they were waiting on a tech to calibrate it...so i was like.."how do you sell someone a RoadForce balance when you KNOW its not going to be perfect?"

I'm going to assume its your wheels and tires...either lost a weight, or might be the China wheels that are being sold a dime a dozen...

Brand

Its a good thing you were part of the design and engineering team and would therefore know if those things would have a direct or indirect affect on the cause of the issue you are having.

Basically what I am saying is that your honest opinion doesn't mean anything and it just that, nothing more than an opinion.

AricsFX

iTrader: (3)

Good thing leveling the front has nothing to do with the driveline on a 2wd to cause vibrations

Jake Spoon

The dealer is correct in this case, imo. Your vibration is almost certainly related to the wheels and/or tires. You can balance them today and hit a pot hole tomorrow, which could result in vibration.

Apples

And I second this suggestion.

GMC to Ford

Road force variation check....

Last truck... two tires from factory had excessive road force (spec 26 lbs. - one tire at 39 lbs and the other one at 41 lbs.) Replaced under warranty. A few months later I replaced all 4 with Michelin LTX M/S from Costco. One of those tires had excessive road force (32 lbs.) and was replaced.
Current truck...one tire from factory had excessive road force (50 lbs.) and replaced under warranty.

My two week old Yokohama Geolandar G015 (Load E) are getting replaced next week with BFG KO2 (Load D) due to bed bounce.

All of my road force issues were on P rated tires. The spec for LT tires is 30 lbs. Four tire companies in my area with Road Force balancing capability. Three of the four were either broken or out of calibration. The fourth one was old and the store recommended waiting for the new machine to arrive in two weeks even though it was calibrated.

By the way, I would not pay someone to road force check my tires, at additional cost, unless they agree to vector the tires on the rim if needed. A few stores will just check and call it good or bad (replacement). A good tire can be made better if it is vectored on the rim.