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Dexter DX6.6 Drop-N-Go Brake Actuator - Drum Brakes - 2" Ball - Zinc Plated - 6,600 lbs
(6 reviews)
Price: $352.52
In Stock
Dexter
Dexter DX6.6 Drop-N-Go Brake Actuator - Drum Brakes - 2" Ball - Zinc Plated - 6,600 lbs
Part Number: DX79UR
In Stock
$352.52
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- Reviews (6)
- Q & A (0)
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Dexter Brake Actuator - DX79UR
Highlights
- Quick Hookup Every Time: Drop-N-Go auto-latch locks onto 2" hitch balls with no extra steps.
- Smooth, Automatic Braking: Hydraulic surge design syncs trailer brakes with your tow vehicle.
- Built for Rough Use: Zinc-plated steel resists corrosion for long life around water or road salt.
- Reliable Stopping Power: Rated for 6,600 lbs GTW and 660 lbs tongue weight.
- Simple Install: Fits 3" channel tongues with bolt holes spaced 3" on center.
- Lasts Through Heavy Hauls: Aluminum master cylinder and greasable rollers stay smooth and resist wear.
Features to know about
Smooth Hookups Every Time: Drop-N-Go Auto-Latch Coupler
The Drop-N-Go coupler makes connecting to your 2" hitch ball quick and simple. It automatically seats around and latches onto the ball, even if the latch is in the closed position. A sturdy pin secures the ball in the coupler socket, giving you a solid lockup without extra steps. The low-profile handle is easy to lift when you’re ready to release, so hitching and unhitching takes less effort and time.
Reliable Braking: Surge-Activated Hydraulic System for Drum Brakes
This actuator synchronizes your trailer’s drum brakes with your tow vehicle’s brakes for dependable stopping power. As your trailer moves forward during deceleration, the actuator telescopes and applies pressure through the master cylinder to engage your brakes smoothly. The internal rollers include grease fittings for long life and consistent movement, so you get steady, predictable braking every trip.
Built to Handle Tough Loads: 6,600 lb Capacity on a 3" Channel Tongue
With a 6,600 lb capacity and a maximum tongue weight of 660 lbs, this unit is ready for heavy work. It mounts on a 3" wide channel tongue using standard bolt holes spaced 3" apart on center, so setup is straightforward and secure. The durable steel body stands up to repeated use while maintaining solid alignment between trailer and tow vehicle under load.
Long-Lasting Protection: Zinc Plating and Aluminum Master Cylinder
The zinc-plated finish shields the actuator from rust and corrosion, making it a strong choice for trailers exposed to water or harsh conditions. Inside, the aluminum master cylinder resists pitting and corrosion better than cast steel designs, helping keep your brake fluid clean and your system operating smoothly.
Added Safety on the Road: Integrated Breakaway Kit
For an extra layer of protection, the built-in breakaway kit activates your trailer brakes if it ever disconnects from the tow vehicle. It’s a simple, reliable safeguard that keeps your trailer from rolling free in an emergency.
Specs
Application
- Application: hydraulic drum brakes
Compatibility
- Ball size: 2"
- Mounting: 3" wide channel tongue
Weight and Capacity
- Capacity: 6,600 lbs
- Maximum tongue weight: 660 lbs
Warranty
- Warranty: 1-Year warranty
K99-066-00 Dexter Drop and Go Brake Actuator - Drum Brakes
Customer Satisfaction Score:
86% were satisfied with this product
14% of customers were not satisfied
- Wrong item was ordered
- Defective
Ratings & Reviews
4.3
6 reviews
by:
David
09/17/2025
Easy installation and brake bleeding instructions were helpful.
by:
Mike
01/30/2026
i have damage to this out of the box. The first time i unscrewed the brake fluid cap after install nocticed someone cross threaded it from factory
by:
James
06/25/2026
by:
Greg
06/24/2026
by:
Kevin
06/27/2026
by:
Jason
08/13/2025
6
6
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See what our Experts say about this Dexter Brake Actuator
- Availability of an Older Dexter/Tie-Down 82405 Disc Brake Kit With ActuatorHey Tommy, thanks for reaching out! I did a little digging on that 82405 number, and it actually traces back to an older Tie Down Engineering disc brake kit, not a current Dexter part number. That exact kit isn’t available anymore, but the good news is we do carry all the components needed to build out an equivalent setup. Here’s what you’d need: Dexter Disc Brake Kit # T2HRCM10DAC Dexter DX6.6 Drop-N-Go Brake Actuator # DX79UR Kodiak Hydraulic Brake Line Kit # 20TA-BLKIT Solenoid Valve...
view full answer... - Troubleshooting Dexter DX6.6 Drop-N-Go Brake Actuator Not Fully Seating On Hitch BallHey Carol! If it’s sitting on the edge of the ball it likely isn’t fully seated. Make sure you’re lowering it completely onto a 2" hitch ball with the jack. Once it’s down, try raising the jack to lift the rear of the vehicle slightly. If it’s properly latched, it will stay connected. If it won’t stay attached or still doesn’t wrap under the ball, it’s not coupled correctly and shouldn’t be towed. When did you get your # DX79UR? If it less than a year old that kind of issue will fall...
view full answer... - Availability of Dexter DX6.6 Drop-N-Go Brake Actuator With Electric LockoutHey Scott! The Dexter DX6.6 Drop-N-Go Brake Actuator # DX79UR is not available with a solenoid since it was designed to be used with free-backing brakes. If you want an electric lockout you will have to add a solenoid # T4748800 to the brake actuator. Let me know if you need anything else.
view full answer... - Does Dexter DX6.6 Actuator have a Manual Lock Out Pin HoleHey Bill, yes the Dexter DX6.6 actuator part # DX79UR does have a manual lock out pin hole and it is that hole that you mentioned that is right below the safety pin wire. It's in the picture I attached but it's actually the hole that is behind the one that the guy is inserting a pin into.
view full answer... - Latch Repair Kit For A Dexter DX6.6 Surge Brake ActuatorHi Keith! We do have what you are looking for with the Replacement Drop-N-Go Coupler Latch Kit for Dexter and Tie Down Brake Actuators - 2" Ball # DX395GV. This will be a direct replacement for your Dexter DX6.6 Disc Brake Actuator - 2" Ball # DX29UR (and actually the Drum Brake # DX79UR actuator as well) and it includes everything you need to get the latch working properly again. What kind of trailer do you have this actuator installed on?
view full answer... - Replacement Breakaway Cable For Dexter DX6.6 Drop N Go ActuatorHey Mike, you'll just need the Replacement Breakaway Cable for Dexter and TDE Surge Brake Actuators # DX595GV. This fits your Dexter DX6.6 Drop N Go Actuator such as the # DX79UR. What happened to the old cable?
view full answer...
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Info for this part was:
Written by:
Lindsey S
Expert Research:
Jameson C
Installed by:
Steven C
Updated by:
Wilson B
At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Mike L.
1/30/2026
I'm sorry to hear that, Mike! We're working with Dexter to get you a replacement.