Short Arm 4-link what's the difference PMF vs RCD?

[extreme3807]

Do you guys know any place that sales good lowering kits for 6.4s

How low do you want to go

 

[stroker 6.4]

It's an ecsb with 20x12 with 420s So I'm thinking like 2"?

 

[extreme3807]

Look at post #3 in this thread. That's about how low mine is. No lowering kit. 5.4 coils, 1.5" rear blocks, rear overload springs taken out

 

[stroker 6.4]

Like f150?

 

[stroker 6.4]

How does it ride with those?

 

[NotStock]

No the F-250 has a 5.4L option aswell.

 

[Jeff@Spartan]

They're technically not 5.4 coils. They're just lower weight rated 4wd Super Duty coils. No block and 4800 lb coils is pretty much level and I would consider it a 1/2 drop. With 4400 lb coils and no block, you're looking at a 2/2 drop with a little rake.

 

[stroker 6.4]

Cool thanks! How do they ride with that set up?

 

[6.4psd916]

Good, the front feels kinda soft to me, but rides pretty good.

 

[stroker 6.4]

Thanks, and do you like you pmf 4 link? Did it make a lot of difference?

 

[6.4psd916]

As I said earlier in the thread, it rides better, but you can feel the bumps more, kinda a firmer feeling.

 

[extreme3807]

Night and day difference. Well worth every penny

 

[onebadf150]

Like f150?

I have 5200lb coil in the front which ride way better than the 5600lb that came in my truck. I also have a 1" icon block in the rear which replaced my factory block. At this stance my rear is about .5inch higher than the front. With the factory coils and 1" block my ec/sb was dead level. I going to remove the spring above the fat bottom one to soften the ride in the rear. I also have OUO adj traction bars.

Here's a pic before the 5200lb coils

 

[Breaking Habits]

As I said earlier in the thread, it rides better, but you can feel the bumps more, kinda a firmer feeling.

So it bump steers?

 

[6.4psd916]

So it bump steers?

Negative

 

[Super08Duty]

You could also cut your factory coils, and remove the rear block and bottom leaf.

 

[Jeff@Spartan]

So it bump steers?

How did you get bump steer from that description?

 

[Layson]

As I said earlier in the thread, it rides better, but you can feel the bumps more, kinda a firmer feeling.

How did you get bump steer from that description?

Just kind of a vague description. How does it ride better when you can feel the bumps more, and at the same time have a firmer feeling? Usually 4-links don't have a firmer feeling if you don't upgrade your shocks and sway bar...

I guess the question should be asked if the bumps are felt in the steering wheel or in his seat...

 

[6.4psd916]

Okay, since it has become a more of a topic of discussion over my "vague" statement. There is no more or even less bump steer than with the factory arms. The truck does sway alittle more if you swerve back and forth but that's to be expected. Steering feels to be more responsive. The firmer feeling I am talking about is mostly when hitting larger pot holes, speed bumps, ect. In general driving the truck rides smoother than with factory arms and shocks. After the 4-link it was better, but once I added the 5100's, it made a huge difference.

 

[Layson]

Okay, since it has become a more of a topic of discussion over my "vague" statement. There is no more or even less bump steer than with the factory arms. The truck does sway alittle more if you swerve back and forth but that's to be expected. Steering feels to be more responsive. The firmer feeling I am talking about is mostly when hitting larger pot holes, speed bumps, ect. In general driving the truck rides smoother than with factory arms and shocks. After the 4-link it was better, but once I added the 5100's, it made a huge difference.

I am sorry but it was a vague statement. This does explain it better, thanks.

Did you have bump steer with the stock radius arms? Typically you don't see that on these trucks.