Forum Discussion

j-d's avatar
j-d
Explorer II
Aug 05, 2014

E450 Braking Improvement with Axle Upgrade

Earlier this year I replaced the OEM axle, brakes, and radius arms on our 2002 chassis with a new takeoff axle from a 2012 E450. The 4x4 conversion companies will sell these parts as a "kit."

We've taken a few RV trips since the upgrade. Braking has been smooth and easy. Oddly, the RV is also quieter. I can only figure that's because the radius arm mounts to the frame rails is different.

Anyhow, I drive the RV very conservatively. I try to maintain a long following distance and stop gently, probably like most of you. This week, a pickup pulled out ahead of me and came up to 55MPH. Then braked hard to pull off the shoulder. I made a semi-panic stop to get slowed down. Not enough to activate ABS but way harder than usual.

Our 31-ft scales in the high 13000's and it pulled down like a car! It was smooth, strong, and had me knowing I had more! Before the upgrade it would have been tense. More pedal pressure, less slowing, me relieved when it was over.

Those of you with a 2008 or newer E-Series should already be experiencing this kind of performance. But if you have an earlier year and sometimes it brakes like somebody stuck a block under the pedal, the improved brakes really are an improvement!
  • I did a Ford 8.8 take off on my Jeep a few years ago. Take off's are a great value if you know how to wrench. Was your previous rear axle disc brake?
  • Any idea what the difference is in numbers for old and new brake pad swept area?
  • j-d's avatar
    j-d
    Explorer II
    wcj - I changed only the Front Axle. I don't believe the 4x4 upfitters change the rear axle, brakes, etc.

    ramble - Another OP may have some numbers, I do not. I can say the "new" rotors are simply bigger. There is more swept area from the hub area outward to a larger overall diameter. The "platters" on each side of the "waffle" on between them are thicker, and the Hub/Disc assembly is significantly heavier. Pads are wider to touch the larger swept surface, plus longer, and I believe a little thicker. Likewise, the calipers are noticeably larger.

    From what I've read, the rear brakes were also upgraded on the E450 for 2008 and later. Larger, and possibly mounted differently. E350 with rear disc had slide bolt mounts and E450 used driven-in slide clips. I'd imagine the newer ones have larger brakes with slide bolts.

    EDIT: Ford describes the 2008 braking system as "all new" so I guess I went "half new." Part of the "new" story was different Pad Material.
  • J-D, sounds like you upgraded to a 4x4 setup as well (I think I read your post correctly) However, a brake upgrade can be accomplished with after market parts for most vehicles. Rotors, calipers, pads and also important are the flexible section of your brake lines. I recently bought new steel braided flexible lines for the front of one of my vehicles to replace the existing lines. The new lines have a 3000 psi rating and I can tell you, I have more controlled braking with just new flexible lines installed.
  • j-d's avatar
    j-d
    Explorer II
    Expy, No, I installed the OEM 2WD axle and components that were removed so another E450 chassis, new, could be converted to 4x4 using F350 parts. The lines sound like a good idea. I went with new Dorman brand hoses. Dorman's a brand with a good reputation. The hoses themselves, however, are of Chinese origin.