Gas 2500 spongy brakes and other issues

[pizzatots]

My 2018 1500 and 2020 1500 both had great pedals. 2023 2500 is still crap, unless ACC is active and the pedal is hard

 

[Pete300]

After looking into the actual parts on my vehicle brake system I noticed that there are rubber lines out of master cylinder. I'm pretty sure that's what is causing that feel. My old 2005 Ram 2500 stopped on the dime and gave you change. With a firm pedal. Not this mush of a pedal on my 2023.

 

[H3LZSN1P3R]

Old thread but accurate information:

My '21 1500 QC 4x4 5.7 3.92 stock tires 6'-4 bed had very firm brakes and they stopped the truck quickly, I drove it like I stole it all the time and I thought they were the best brakes I have had in a truck and I never felt concerned.

My '24 2500 CC 4x4 6.4 3.73 stock tires 6'-4 bed has very soft brakes that go damn near to the floor driving normally, they suck ass in comparison.

I don't remember if my 21 had hydroboost of vacuum and I have not looked at my 24.

Both are vacuum I believe the diesels are the only ones that get hydro boost since diesels don't make vacuum like gassers do

 

[Rockcrawlindude]

I think it's just an issue of where the pads sit relative to the discs, since its great when ACC is active (it moves the pads closer to the discs to keep them "ready").

Wut

 

[pizzatots]

Wut

Good ol Jimmy figured that out in the code. I can’t remember which thread I saw it in.

 

[Rockcrawlindude]

Good ol Jimmy figured that out in the code. I can’t remember which thread I saw it in.

I don’t know what ACC is but I guarantee it doesn’t move the pads closer to the discs to keep them ready.

 

[pizzatots]

I don’t know what ACC is but I guarantee it doesn’t move the pads closer to the discs to keep them ready.

Adaptive Cruise Control. When you cancel it via the brakes, the pedal is incredibly hard and has a very short travel. There’s another feature called “ready braking” as well. I assume that’s the same thing.

 

[pizzatots]

I don’t know what ACC is but I guarantee it doesn’t move the pads closer to the discs to keep them ready.

Post in thread 'Adaptive cruise control any changes in operation from 2019 to 2022?'
https://hdrams.com/forum/index.php?...-operation-from-2019-to-2022.7579/post-142134

Ready Alert Braking
This feature prepares the brakes for a panic stop when sensors detect a quick release of the accelerator pedal that suggests the driver may need to stop suddenly.

Rain Brake Support
When the windshield wipers are activated, Rain Brake Support removes water from brake pads by applying a small amount of pressure to the caliper.


These three features make me think this pedal issue could be solved via software or a change as to how far the brake pads sit from the discs. Dunno! I’m a Software Engineer not HW engineer!

 

[Brutal_HO]

I don’t know what ACC is but I guarantee it doesn’t move the pads closer to the discs to keep them ready.

Well resident expert @Jimmy07 said otherwise and I tend to believe what he says when it comes to these trucks electronic controls.

I can attest that when ACC is on, my pedal is Ron Jeremy rock hard.

I believe it had more to do with the ABS pre-staging with some added line pressure.

 

[H3LZSN1P3R]

I don’t know what ACC is but I guarantee it doesn’t move the pads closer to the discs to keep them ready.

Yea I would think the ABS system is affected more than the pads so the pads are not dragging

 

[pizzatots]

Yea I would think the ABS system is affected more than the pads so the pads are not dragging

whatever makes the pedal hard works for me!

 

[Brutal_HO]

whatever makes the pedal hard works for me!

That's what she said.

(someone had to do it.)

 

[Rockcrawlindude]

The pads touch the rotors all the time

 

[whitexc]

And if any added pressure was applied to the pads we would feel that as drag/resistance. It all sounds complicated and expensive to repair! KISS. Factory brakes are garbage.


Sent from me

 

[Jimmy07]

 

[Rockcrawlindude]

View attachment 78521

Well it looks like I was wrong.

 

[Jimmy07]

Well it looks like I was wrong.

I get why people say that the pads are always contacting the rotors, but it’s only because they witness this behavior in a static situation, such as changing the pads. In that situation, when the brakes are applied and released, there’s nothing that automatically pushes the caliper pistons back in once there’s no more fluid pressure being applied (hence one of the reasons you have to mechanically do it with a clamp to get the new pads back onto the rotor).
But once the vehicle is under way, the energy created by the heat and friction pushes the pads away from the rotors.

 

[Brutal_HO]

I get why people say that the pads are always contacting the rotors, but it’s only because they witness this behavior in a static situation, such as changing the pads. In that situation, when the brakes are applied and released, there’s nothing that automatically pushes the caliper pistons back in once there’s no more fluid pressure being applied (hence one of the reasons you have to mechanically do it with a clamp to get the new pads back onto the rotor).
But once the vehicle is under way, the energy created by the heat and friction pushes the pads away from the rotors.

As does the added force (even if small) that pad springs impart.

 

[Rockcrawlindude]

As does the added force (even if small) that pad springs impart.

How many days do I have to wear a dunce cap?

 

[Brutal_HO]

How many days do I have to wear a dunce cap?

Might have to change your nickname for the rest of the month.