Air Bag Upgrade For A 2007 Dynamax E250 With AirRide  

Question:

Expert Reply:

Hi Marc!

I have three potential options (all linked below) for you that will all fit the 230, 235, 250, 254, 280, and 282 Triton models, I do need to point out that there isn't going to be a way to upgrade just the air bag themselves. The Firestone 5406 bags are a fairly unique style and there is no option available to simply upgrade those. At least, not that I am aware of.

Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle # AL88242
-Drilling through the frame is required for installation, it does not fit vehicles with supply lines on the outside of frame, and the distance from the outside of the frame to the inside of the tire must be at least 8"

Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers - Rear Axle # AL88131
-Though no drilling through vehicle frame required for installation, this is designed for vehicles with a GVWR less than 14,050 lbs and is intended for vehicles with supply lines on the outside of frame. Both this and the previously mentioned # AL88242 would completely replace your current air bags, but they both also have the internal jounces and you would be covered in the event of a bag rupturing.

Timbren Rear Suspension Enhancement System # TFERSD
-This has a 5,600-lb capacity, there is no drilling through vehicle frame required for installation, and this is designed for Motor Home models. There is also not really a way for this to fail since it's a rubber jounce and can never lose air pressure like a bag can. These are very easy to install, but just keep in mind these will likely be on the stiff side when compared to air springs/bags alone. However, there is a very good chance you could install these while keeping your current air bags installed. If you can find a way to take a few pictures of where those are bags are currently sitting (basically on the axle or on the leaf spring pack) and send them [email protected], I can confirm that last part.

Where do you typically take your Dynamax? And are you also towing anything behind it?

expert reply by: Lazer S

0

Marc V.

11/10/2026

Hi Lazer, I looked at the installation instructions on your website for the Air Lift and Timbren. These instructions and photos show leaf springs. It seems the intent of both systems is to augment the suspension (that has leaf springs.) The Dynamax Air Ride is only an AirBag on the end of a pivot arm with axle mounted about midway between pivot point and the AirBag mounting platform. That is, I have no leaf springs. So far, I have not been successful at finding a way to prevent axle to frame contact in the case of AirBag failure.

Lazer S.

11/10/2026

@MarcV Oh shoot. I hadn't thought of that. My bad. I finally found a decent diagram of what the Dynamax air system looks like, so it definitely ruled out the two air bag options I mentioned. However, the Timbren # TFERSD does look like it will work. It replaces the rubber jounce that keeps your axle from making contact with the frame, but again, it will likely make the ride harsher. The SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-107-54 installs the exact same way as the Timbren (so it replaces your factory jounce), but it has a lower 2,800 pound capacity and will not make the ride nearly as harsh as the Timbren. It will still offer good support if the air bag ruptures though and can even help with body role issues, if you are having any. That said, both the Timbren and the SumoSpring options come with a satisfaction guarantee, so if you don't like them within 30 days of the install, we can absolutely take them back. If it were me, I would try the SumoSpring first and then go to the Timbren if it isn't giving you enough support.