Post Lift Install Vibration

[RANGER/HOBB]

Before you call people names, you should make sure you comprehend what you read.
Let's see if we can help you.
Tires and front leveling done first at same time. No vibration.
Later the blocks installed- vibration appears.

Please enlighten all the numb-nuts out there how rear blocks affect balance.

You've already determined who you are and where you stand.

You can’t help yourself, let alone attempt to do so for someone else.…….you drive a Ford Flex. Go argue with yourself.

Now you’re going to attempt to make this thread about you………..You assume, from a stand point of non-ownership. It’s all personal speculation, a guess and from you even less, plain and simple.

His best action, is to talk with his installer………end of conversation.

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[TwoTone]

You've already determined who you are and where you stand.

You can’t help yourself, let alone attempt to do so for someone else.…….you drive a Ford Flex. Go argue with yourself.

Now you’re going to attempt to make this thread about you………..You assume, from a stand point of non-ownership. It’s all personal speculation, a guess and from you even less, plain and simple.

His best action, is to talk with his installer………end of conversation.

LOL nice deflection.

 

[RANGER/HOBB]

No deflection needed, you don’t own a Ranger Raptor or a Ranger. You have no valid input with issues pertaining to either. So, any discussion regarding either is a moot point, especially from a Ford Flex owner.

In a nutshell you’re a “ troll,“ who searches for argumentative points of discussion, nothing more. Which is exactly what you’ve been doing in nearly every post you’ve made on the forum.

The way to deal with “trolls“ like yourself is, “don’t feed the trolls.” https://www.howtogeek.com/465416/wh...ow-to-handle-trolls/#what-are-internet-trolls < This would be you!

Not to mention, I not going to argue an opinion, especially one that has no direct experience or validity………Bye bye troll!🫵

 

[Jason B]

Drive shaft vibrations were a big issue on Gen 5. There was usually a small constant vibe but was really noticeable at certain speeds. I had a slight vibe at take-off, that disappeared, then really showed up at about 73 MPH. Ford had a TSB to correct pinion angle, which rarely worked 100%. Then they just started swapping out the shaft with standard U-joints to one with CV joints like the tremor had. Many owners went to a one-piece shaft from Tom Woods that 100% eliminated drive shaft vibrations.

But all in, I'd first do the road force balance before digging in and messing with pinion angles. Without proper measuring tools, it will be a trial and error to get it right.

 

[scubajosh77]

So the installing shop took a look at it and they think it is pinion angle and they’re looking to source a carrier bearing spacer kit

 

[Jason B]

I went and looked at my FX4. We already have the rZeppa (CV) joint.

 

[scubajosh77]

For shits n giggles I’m going to go ahead and have the road force balancing done. It’s only 50 bucks so it’s worth a shot.

 

[scubajosh77]

Well there went $50. No change

Ordering this kit and will install myself. Turbo easy. Will just have to trial and error how many spacers are needed as I didn't measure the original angle and have no way of measuring what it needs now.

Interestingly enough I found the tech bulliten on the 19-23s and they say 5-6 degrees is necessary.
https://static.nhtsa.gov/odi/tsbs/2023/MC-10233590-0001.pdf

 

[Reddog99]

If it's a pinion angle problem, why didn't the lift kit come with the required angle shim in the first place???
I assume that the front alignment was performed after both ends were lifted?

 

[scubajosh77]

If it's a pinion angle problem, why didn't the lift kit come with the required angle shim in the first place???
I assume that the front alignment was performed after both ends were lifted?

That is correct. My assumption here is that this is a tolerance stacking/intermittent issue for Ford. Some vehicles may have it, others don't. If you read up on the 5G issues you see that it was kinda the same thing. I'm thinking (hoping) that mine was just at the point where the rear blocks were enough to cause an issue and dropping the carrier bearing will clear it up.

Kit should be here in 2-3 days. I'm going to do the install myself, it's turbo easy. If it persists after installing the spacers I guess I'll just pull the rear blocks out and live with it. Hope I don't have to, I much prefer the way she stands now.

 

[scubajosh77]

So for more shits n giggles I decided to measure the angle based on the instructions in the 19-23 TSB. Assuming the angles haven't changed from 23-24 and 5-6 degrees is still the sweet spot, mine is definitely off.

 

[scrappyisbe]

So for more shits n giggles I decided to measure the angle based on the instructions in the 19-23 TSB. Assuming the angles haven't changed from 23-24 and 5-6 degrees is still the sweet spot, mine is definitely off.

What is the angle for the other side of the joint?

 

[scubajosh77]

What is the angle for the other side of the joint?

Not as easy to replicate since the TSB tells you to go off the flat of the flange. Front and rear connections don't have one. I suppose I could measure on each shaft itself?

 

[scrappyisbe]

Not as easy to replicate since the TSB tells you to go off the flat of the flange. Front and rear connections don't have one. I suppose I could measure on each shaft itself?

you could measure angles on the shaft body but the bearing caps are more accurate. I would measure all the caps( just like you did) on every joint that is vertical. Then rotate the driveshaft so all the others are then vertical too and measure. And the difference between the 2 measurements on each joint is your angle. You want all of them to cancel each other out by the time you get to the diff. I.E. joint 1 = 2°; joint 2 = 2° and joint 3 = -4° so the sum would be 0° at the diff.

 

[Jason B]

Aren't the specs in the Ford TSB for non-lifted/stock trucks. Wouldn't it be different for lifted trucks?
Or is the goal to maintain that angle, regardless of the lift?

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