UFP Unique Functional Products

UFP Replacement Trailing Arm 3,750 lb with DB-35 Disc Brakes and Vault Hybrid Lubrication System #U43130

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  • Regular price $ 430.11
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UFP Replacement Trailing Arm 3,750 lb with DB-35 Disc Brakes and Vault Hybrid Lubrication System #U43130

This replacement trailing arm works with all Trailer Buddy-UFP 3750lb. capacity torsion axles.  Mounts easily to the desired position by splines that allow for ride height adjustment.  The complete assembly is ready to be bolted on to existing torsion axle with mounting bolt (included). Complete with DB-35 series Disc Brake Rotor and Caliper.


  • Trailing arm, rotor, and caliper are zinc plated for superior corrosion protection
    • 9 3/4" diameter DB-35 Rotor (Tapered)
    • Standard UFP Aluminum DB-35 Caliper
  • VAULT maintenance-free hybrid oil hub, requires no maintenance and is completely sealed
  • Tooth and groove or spline attaches easily to any 3,750 lb UFP Torsion axle
  • Mounting bolt, nut, and washer are included
  • Tapered spindle size is 1 3/8" x 1 1/16"
  • Bearings and seal are pre-packed with VAULT Hybrid Oil
    • 68149 Inner Bearing and 44649 Outer Bearing
    • 1.68 ID Seal
  • VAULT hub cap seals the hub and maintains slight pressure in hub

UFP Torsion Axle end unit trailing arm with VAULT Hybrid oil pre-packed with DB-35 Series Disc Brakes

Customer Reviews

Based on 47 reviews
Ryan L. (Atlanta, US)
2018 Ranger 520L trailer

Excellent product but even better customer service!

DeezNutz (Fairfield, US)
Only way to go

Good parts, fit and function. thanks again

Jeff M. (Bakersfield, US)
Direct Swap on my wake boat trailer

Super easy one bolt install. If you have a bearing fail and it takes out your rotor or caliper this is the ticket! Comes pre packed and fully assembled. Just remember to bleed your brakes.

Steve (Marion, US)

Haven’t installed but looks like exact replacement

John G. (Senatobia, US)
Great customer service

Katina was very knowledgeable and helpful. Fit my 2014 Ranger 521 perfect. Boat trailer is repaired and back fishing again. Thanks for everything.

Darryl A. (Richmond, US)
Skeeter vault hub replacement

Guy on the phone was most helpful. Sorry but can’t recall his name. My order was delivered on time. May 25 min to pull the old hub off as well as the brake caliper. I re used my old caliper and brake pads as they were in good shape. Maybe 10 min to install the new one. I did watch the video of the ranger boat in the reviews. Very helpful

I did buy a second hub and will travel with it on long trip

Josh P. (La Grange, US)
Great service

Fit my 2016 Ranger 521c perfectly

Scott D. (Margate, US)
Great pice. Even better service.

These guys are awesome. Got me a hub in no time that was $300 cheaper than I could get it locally. Initially we had a shopping issue due to my address, but they made it right and expedited to get me fishing.

jason A. (Indianapolis, US)
Great product

Changed all 4 tortion axles with the pacific trailer’s replacements. The old skeeter had the smoothest ride ever home from Florida. Brakes were very smooth too. Thx

Randall D. (Olanta, US)
2012 Z520 Ranger

This was a perfect fit for my 2012 Z520 Ranger. Was able to change it out in about an hour.
Katarina was very helpful during the purchase process. Arrived in about a week.
Thanks Again