So [moderator edit] sick of incompetent tire shops!

[CountryB]

Originally Posted by Jfreeman

They had authorization to do the king pins and tighten the bearings for $1450 but called back to tell me they were going to just do the wheel bearings.

That is really not a bad thing. Maybe Shop did not think Kingpins were bad enough to need replacement - and just wanted to save you some money.

But if kingpins are obviously bad, and they didn't notice (or they checked and don't know) then that is bad.

I didn't see your other post - but are your sure the kingpins are bad? Who said they are bad? Some shops will just try to find work were none exists (that's the reason for "free" inspections by dealerships. To find work).

Sounds like you need a third opinion on the kingpins.

[Nasdaqsam]

This sounds more like suspension than anything else. King pins are a good starting point. Do you have springs or air bags? From what you are describing it is acting like a broken spring.

[Jfreeman]

Originally Posted by saddlesore

You swapped tire & wheel right?. I was addressing the wheel it's self....(including waller'd out lug bolt holes)
If so
thinking.......................................... You have removed the question of an out of round wheel/tire.................................
mebbe?........ Ummmmm......... Hmmmmm..
Only thing I can come up with is worn or damaged suspension parts..................
QUESTION!!!!
Does it have disc or drum brakes on the front axle???????

That is a good question, I would have to ask, but I assume they wouldn't unmounts and remount if they felt like they didn't have to. The reason they said they swapped the front 2 tires was because of wear.

I believe I have Drum breaks up front. You can look behind the tire and see the pads that would be pressing down on what I believe is the drum.

[saddlesore]

Originally Posted by Jfreeman

That is a good question, I would have to ask, but I assume they wouldn't unmounts and remount if they felt like they didn't have to. The reason they said they swapped the front 2 tires was because of wear.

I believe I have Drum breaks up front. You can look behind the tire and see the pads that would be pressing down on what I believe is the drum.

One thing I have found on 18 wheelers with drum brakes is drums that is out of round(caused a slight herky-jerky steering wheel when stopping) And over time flat spotted the tire which then would cause the tire to bounce when traveling.
And have come across two that were out of balance one was just not balanced and the other the balance counter weight was missing (the weight had been impacted by something and sheared off.)
Both of these had Centramatics installed and as the drum progressively got further out of round/balance the Centramatics could no longer compensate.....
Also all the tires involved had weird wear patterns.....

[Old-Biscuit]

Originally Posted by Jfreeman

I believe I have Drum breaks up front. You can look behind the tire and see the pads that would be pressing down on what I believe is the drum.

Can NOT see the brake SHOES used with DRUM Brakes....Shoes are INSIDE the drums

DISC Brakes have external PADS that Squeeze the brake Rotor

[Mr_D]

Originally Posted by 1doodadd

What brand tires did you just purchase? Goodyear sells a lot of eggs

Talking to various Les Schwab tire stores comes back to Michelin having the least trouble with out of round tires and balancing problems.

[CountryB]

Originally Posted by Old-Biscuit

Can NOT see the brake SHOES used with DRUM Brakes....Shoes are INSIDE the drums

It depends.
A lot of truck drum bakes will not have backing plates (either never installed or were removed) so you can see the brake shoes in the drum.
My Tag axle is like this.

[Jfreeman]

Originally Posted by Nasdaqsam

This sounds more like suspension than anything else. King pins are a good starting point. Do you have springs or air bags? From what you are describing it is acting like a broken spring.

I have airbags with Source blistien shocks.

[Jfreeman]

Originally Posted by Old-Biscuit

Can NOT see the brake SHOES used with DRUM Brakes....Shoes are INSIDE the drums

DISC Brakes have external PADS that Squeeze the brake Rotor

They are drums, but you can still see the break pads if you look behind them.

[Jfreeman]

Originally Posted by CountryB

That is really not a bad thing. Maybe Shop did not think Kingpins were bad enough to need replacement - and just wanted to save you some money.

But if kingpins are obviously bad, and they didn't notice (or they checked and don't know) then that is bad.

I didn't see your other post - but are your sure the kingpins are bad? Who said they are bad? Some shops will just try to find work were none exists (that's the reason for "free" inspections by dealerships. To find work).

Sounds like you need a third opinion on the kingpins.

I have an appointment at another shop here on Monday for a second opinion.

[Rburian]

I had a 2000 Diplomat with GY 255/65 tires, terrible ride and tire wear, change to Michelin 275/70 and Koni shocks, major improvement in handling and ride, not sure this has anything to do with your issue, but sure made a great ride for me.

[Nasdaqsam]

Originally Posted by Jfreeman

I have airbags with Source blistien shocks.

My money is on a weak or failing air bag. Bouncing is a symptom.

[CountryB]

Originally Posted by Nasdaqsam

My money is on a weak or failing air bag. Bouncing is a symptom.

What is a "weak or failing airbag"? Either it holds air or it doesn't - right?
Do you mean a failing "height control valve"?

Bouncing is a symptom of bad shocks.

[guardrail53]

Thats right, a air bag just cushions the ride! Als a bad king pin will cause wandering, play in the steering wheel, but not bouncing! Bouncing is caused from a out of balance tire, brake drum, out of round tire, bent rim, or all of the above! Rail!