Rear Sway Bar For A 2026 Ram 3500 Dually With 4 Wheel Drive And 6.4L Gas Engine

Updated 10/31/2025 | Published 10/28/2025

Products Featured in This Question

Hellwig Big Wig Rear Anti-Sway Bar - 1-5/16" Diameter

(144)

$678.47

Roadmaster Front Anti-Sway Bar - 1-5/8" Diameter

(2421)

$765.00

Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter

(2421)

$1080.00

Question:

Do you have a rear sway bar to fit 2026 ram 3500 dw 4 wheel drive with 6.4 gas engine?

asked by: Jerry A

Expert Reply:

Hi Jerry!

We do indeed have a rear sway bar for your 2026 Ram 3500 Dually 4 wheel drive with the 6.4 gas engine. There are actually two options and I have them listed below:

Without Factory Sway Bar:
Roadmaster Rear Anti-Sway Bar - 1-1/2" Diameter # RM73FR
With Factory Sway Bar:
Roadmaster Front Anti-Sway Bar - 1-5/8" Diameter # RM47VR

It doesn't look like Hellwig has one for the gas engine 3500 as of yet. Roadmaster makes very good sway bars though, so either of these would work very well for you.

Speaking of which, are you wanting this to help with towing or just reduce body roll and sway when driving regularly?

expert reply by: Lazer S

Jerry A.

10/30/2025

I need to reduce sway while carrying slide in pickup camper. But I don't understand earlier e trailer sent message there was nothing available with gas engine??

Lazer S.

10/31/2025

@JerryA The Hellwig is only for the diesel models, but Roadmaster does fit the gas models (actually gas and diesel options). This is due to the different design that allows it to work with both exhaust systems. The Hellwig was designed specifically to work with the diesel exhaust and doing so made it not fit the gas models. I will have that other page removed as it is incorrect.