UFP Unique Functional Products

Trailer Buddy Replacement Trailing Arm w/ Vault 3,750 lb 5-Lug Hub #43038

  • Sale
  • Regular price $ 159.96
Shipping calculated at checkout.

Trailer Buddy Replacement Trailing Arm w/ Vault 3,750lb 5-Lug Hub #43038

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).  Standard 4-Bolt brake flange integrates into the arm and allows for an instant upgrade for brakes.


  • Trailing arm and hub are zinc plated for superior corrosion protection
  • VAULT Maintenance-free hybrid oil hub requires no maintenance and is completely sealed
  • Tooth and Groove or Spline attaches easily to any 3750lb. UFP Torsion axle
  • 4-Bolt Brake Flange integrated into trailer arm
  • 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 5-Lug hub.

Customer Reviews

Based on 26 reviews
Clinton M.

Nice piece

Andre (Palm Springs, US)
Quality item

Item was sent out quickly and well packaged. I recently Bought a used boat and the trailer has some serious rust issues.
These were exact replacement fit. Quality item as described and For the price is a win win. Buy with confidence

Victoria S. (Rosemount, US)

Parts worked perfectly. A little bit longer thank hoped for delivery, however I understand due to Covid.

John I. (Anaheim, US)
Trailer parts

Little bit of trouble trying to get a hold of somebody to order parts

David C. (Dora, US)
Hubs easily replaced on my 03 Ranger 481vs Ranger Trailer

Took me 30 min to change both hubs out on my 03 Ranger boats trailer. Parts fit perfectly. Pacific trailers got my parts to me quickly and keep me informed where my package was through the entire process.

Chad D. (Murfreesboro, US)
Perfect Fit

I just ordered this for my 2010 bass cat puma trailer. It was a perfect fit! I was able to mount it before making a long trip to a tournament. If you are needing a whole vault axel end hub I recommend ordering from pacific trailers. Great product and decent shipping time.

Dale M. (Birmingham, US)

Flawless from beginning to delivery. Fast delivery. Solid product.

Craig B. (Kansas City, US)
Great Service and Product

Great Service and Product. Website good. Price good. Shipping quicker than anticipated. Product very clean and easy to install. I struggled getting one of my existing ones off until I went and purchased an inexpensive pulley puller. (I believe that is what it is called)

Clay F. (Homestead, US)
Trailer Buddy Replacement Trailing Arm w/ Vault 3,750 lb 5-Lug Hub #43038

I was able to finally find the exact assembly I needed for my bass boat trailer w/ added customer service available when called. I worked through other guys like Dexter and my boat dealer and just remarkable. I was looking for the exact replacement not a compatible item. Thank you Pacific Boat & Trailers.

Julie S. (Muskegon, US)
Happy customer!

When all else failed PT pulled through and got me the part quickly! Fast and easy placement. Back on the lake fishing in no time!