Determining If Dent In Torsion Axle Is Causing Driving Vibrations
Question:
I have a 2019 Legend Cargo Trailer with aluminum frame and tandem torsion axles. The axles both have a significant dent near the center of the trailer see attached photos but the axles dont seem bent. In addition, all 4 sets of wheel bearings have substantial play in them when you push the wheel at the top toward the trailer with your hands. Trailer vibrates going down the road at speed. I know something is wrong. I dont know what to do. Do I have to replace both axles? Replace all 4 sets of wheel bearings? Just pack wheel bearings? If axles need to be replaced, can I replace them with spring axles? I do not *think* that there are more than a couple thousand miles on these axles. Thanks in advance for your advice.
asked by: Paul
Expert Reply:
Thanks for the pictures!
That does look like a good size dent but the axle may not be bent.
What I recommend is removing the hubs and taking a look at the bearings for any abnormal wear, and go ahead and repack the bearings if they look good still.
Likely the spindle nut loosened up giving you the excessive play you mentioned. You will want to place the hub on the spindles while rocking it back and forth to seat the bearings in the races. Next tighten the spindle nut until it stops and the back off the nut until you can spin the wheel with freely but not enough that the hub has too much play.
There is no real exact turn amount that is correct, but you are balancing not having too much play with not binding the bearings to the point they will overheat.
If you find your bearings are worn to the point that they need to be replaced just look for the bearing numbers stamped on the face of each bearing as shown in the included picture of the # L44649. Just let me know the bearing numbers and I would be happy to recommend the correct replacements for you.
Now go ahead and spin the wheels and look for any vibrations/movement that would indicate the axle is bent.
If the vibration is still there meaning the axle is bent, you will need to replace the axles.
You can replace the axles with standard leaf spring axles but you would need to know the hub face to hub face measurement of your current axle, and the measurement between the frame rails on your trailer for the spring center measurement. In addition you would need leaf springs, and a hanger kit.
For example if you have 3500lb axles one option is the Dexter Trailer Axle Beam with EZ-Lube Spindles - 89" Long - 3,500 lbs # T3584F-EZ-8974 which has a hub face to hub face measurement of 89" and a spring center to spring center measurement of 74". As long as the hub face measurement is the same you can remove the preinstalled spring seats and have the # TRSS238 welded in the correct location.
You would also need Tandem-Axle Trailer Hanger Kit for Double Eye Springs - 3-1/4" Tall Front/Center/Rear # APT5 with leaf springs # e57SR, U-bolts # SP01-040, and U-bolt plates # TRTP238175 which would give you 33-1/2" axle spacing.
The option I recommend is going with the Timbren Axle-less system as it will bolt directly to the frame of your trailer so you will not need to measure your current axles and will not require adding leaf springs as they have a built in progressive rate AEON main spring that does a great job of absorbing road shock leading to a smooth ride.
The correct system will depend on the rating of your current axles which you can determine by looking for the axle tag on the center of each axle, or by using the GVWR and dividing by two since you have tandem axles.
If your current axles are 3500lbs the # ASR3500S05, or we have the 5200lb # ASR5200S01.
I included a few videos of the products mentioned for you to take a look at.
Products Referenced in This Question
Tandem-Axle Trailer Hanger Kit for Double Eye Springs - 3-1/4" Tall Front/Center/Rear
- Trailer Leaf Spring Suspension
- Hangers
- Suspension Kits
- Boat Trailer
- Camper
- Car Hauler
- Snowmobile Trailer
- Utility Trailer
- Double Eye Springs
- Tandem Axle
- etrailer
more information >
Timbren Axle-Less Trailer Suspension - Standard Duty - No Drop - 4 Bolt Flange - 3,500 lbs
- Trailer Axles
- Rubber Spring Suspension
- Easy Lube Spindles
- No Hubs
- 3500 lbs
- Spindles Only
- Universal Fit
- No Drop or Lift
- Timbren
more information >
Timbren Axle-Less Trailer Suspension - Standard Duty - No Drop - 5 Bolt Flange - 5,200 lbs
- Trailer Axles
- Rubber Spring Suspension
- Easy Lube Spindles
- 5200 lbs
- Spindles Only
- Universal Fit
- No Drop or Lift
- Timbren
more information >
3-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 25-1/4" Long
- Trailer Leaf Springs
- Double Eye Springs
- 4000 lbs
- 1-3/4 Inch Wide
- 3 Leaf
- 25-1/4 Inch Long
- Painted
- etrailer
more information >
Replacement Trailer Hub Bearing - L44649
- Trailer Bearings Races Seals Caps
- Bearings
- Standard Bearings
- 1.063 Inch I.D.
- Bearing L44649
- Race L44610
- 3500 lbs Axle
- etrailer
more information >
2-3/8" Round Trailer U-Bolts (Qty 2)
- Trailer Leaf Spring Suspension
- U-Bolts
- Camper
- Car Hauler
- Utility Trailer
- 3500 lbs
- Round Axle - 2-3/8 Inch
- 1/2 Inch Diameter
- 5-1/2 Inch Long
- Redline
more information >
Dexter Trailer Axle Beam with EZ-Lube Spindles - 89" Long - 3,500 lbs
- Trailer Axles
- Leaf Spring Suspension
- Easy Lube Spindles
- No Hubs
- 3500 lbs
- Spindles Only
- 74 Inch Long
- 89 Inch Long
- No Drop or Lift
- Dexter
more information >
Spring Seat for Typical 3,500-lb, Round Trailer Axles with 2-3/8" Diameter
- Trailer Leaf Spring Suspension
- Spring Seats
- Boat Trailer
- Camper
- Car Hauler
- Snowmobile Trailer
- Utility Trailer
- Round Axle - 2-3/8 Inch
- TruRyde
more information >
U-Bolt Plate - 2-3/8" Diameter, Round Trailer Axle - 1-3/4" Wide Spring - 1/2" Bolts
- Trailer Leaf Spring Suspension
- U-Bolt Plates
- Boat Trailer
- Snowmobile Trailer
- 3500 lbs
- Round Axle - 2-3/8 Inch
- 1/2 Inch Diameter
- etrailer
more information >
Product Page this Question was Asked From
Dexter Trailer Idler Hub Assembly for 6,000-lb Axles - 6 on 5-1/2
- Trailer Hubs and Drums
- Hub
- Standard
- 25580
- 15123
- For 6000 lbs Axles
- 1/2 Inch Stud
- 6 on 5-1/2 Inch
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- 17-1/2 Inch Wheel
- 18 Inch Wheel
- 18-1/2 Inch Wheel
- Dexter
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Axle w/ Electric Brakes - Easy Grease - 5 on 4-1/2 Bolt Pattern - 89" Long - 3,500 lbs
- Shop: U-Bolt Plate - 2-3/8" Diameter, Round Trailer Axle - 1-3/4" Wide Spring - 1/2" Bolts
- Shop: U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts
- Search Results: spring perch
- Shop: CE Smith U-Bolt Kit for Mounting 3,500-lb, Round Trailer Axles - 5-1/2" Long U-Bolts - Zinc
- Shop: U-Bolt Plate for 2-3/8" Round Axle - 1-3/4" Wide Springs - 1/2" Bolts - Galvanized
- Shop: Spring Seat for Typical 3,500-lb, Round Trailer Axles with 2-3/8" Diameter
- Shop: Replacement U-Bolt with Nuts for 2-3/8" Round Trailer Axles - 1/2" Diameter
- Q&A: How To Fix Tires Hitting Fenders After Installing New Dexter E-Z Flex Equalizers
- Q&A: What Causes a Trailer to Bounce
- Search Results: k71~291~00
- Search Results: e59sr
- Q&A: Parts Needed To Mount 5,200LB Tandem Axles To a Homemade Car Hauler Trailer
- Q&A: How to Grease a Dexter EZ Lube Axle
- Search Results: apubr~1
- Q&A: Best Way to Grease Trailer Hub that Has EZ Lube Spindles
- Q&A: Finding a Replacement 3,500 Lb Axle
- Article: Trailer Wiring Diagrams
- Article: Trailer Maintenance Schedule
- Article: 7 Common Questions Everyone Has About Trailer Tires
- Q&A: How Tight Should Castle Nut be on Trailer Hub
- Search Results: leaf spring
- Shop: Trailer Hitch
- Search Results: equalizer
- Article: Trailer Tire Sizing
- Video: Timbren Axle-Less Trailer Suspension System Installation
- Shop: Trailer Wiring
- Search Results: leafsprings
- Shop: Suspension Enhancement
- Article: Most Popular Wheel Bearings