4.2145 | Rear Leaf Spring Bushings - Ford E350 Super Duty

  • 4.2145 360image 1
  • 4.2145 Rear Leaf Spring Bushings
  • 4.2145 Rear Leaf Spring Bushings
  • 4.2145 Rear Leaf Spring Bushings
  • 4.2145 Rear Leaf Spring Bushings
  • 4.2145 Rear Leaf Spring Bushings
  • 4.2145 360image large 1

Rear Leaf Spring Bushings

Manufacturer: Energy Suspension
Part Number: 4.2145


Free Lifetime Warranty Upgrade
Price: $84.60

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  • 4 2230 Main eye bushings (0.250� flg)
  • 4 2169 Shackle eye bushings (0.235� bvl flg)
  • 4 2051 Rear eye bushings (0.232� flg)
  • 2 Sleeve (1.000�x0.718�x3.518�)
  • 4 Sleeve (0.750�x0.562�x3.500�
  • 2 9.11108 Grease
  • 1 17040 Instruction Sheet
Suggested part for 4.2145: 9.11110
9.11110 Formula 5 Prelube 3 - 5 mL Tubes
Energy Suspension provides grease to install these parts, but you can never have too much. Grab an extra 3-pack of grease so you can more liberally apply grease when installing.

Suggested part for 4.2145: 9.11104
9.11104 Formula 5 Prelube - 8oz. Tub Polyurethane Bushing Grease
8 ounce tub of High Performance Grease by Energy

  • Energy Suspension warrants its products against defects in workmanship and material for 7 years or 750,000 miles when used on passenger cars and light trucks. Products that have been abused, altered, or incorrectly installed are not covered. Energy Suspension will replace defective products or component parts, if inspection for factory personnel determines the part to be defective. Warranty replacement covers only the product. Labor claims, time loss, or freight charges will not be honored.
Cross Reference from 4.2145 to 61021
Prothane 61021
Price: $64.49
Warranty: Lifetime Warranty

FitmentRear Leaf Spring Bushings 4.2145 fits these vehicles:
Polyurethane Rear Leaf Spring Bushings
For high performance applications, the combination of heavy duty or performance leaf springs and HYPER FLEX performance polyurethane spring bushings deliver the maximum benefit.

4.2145 | Rear Leaf Spring Bushings - Ford E350 Super Duty

Polyurethane Rear Leaf Spring Bushings
  • Adds a dramatic amount of performance and durability to any vehicle!
  • Improves vehicle handling, cornering and overall control.
  • Helps the vehicle be in control when maneuvering through turns, during standing start accelerations, braking, even over bumps and berms.
  • Made of Energy's HYPER FLEX performance polyurethane to add performance and durability.
  • One Set Will Cover the Left and Right Side

Energy Suspension HyperFlex Leaf Spring and Shackle Bushings

Vehicles with a leaf spring and shackle set up lean heavily on the springs to take the shock out of a bump. Not only does a leaf spring reduce the force of a bump that you feel, but it also evenly distributes the load across the chassis instead of the whole load pressing down on one point. Your ability to get to point A to point B without scraping the pavement is heavily dependent on the leaf spring and shackle bushings which mount the spring to the frame. Energy Suspension's Hyperflex polyurethane is a stronger material for the mounting points of a leaf spring and shackle. Polyurethane leaf spring bushings are able to handle the stress from the suspension and are not vulnerable to road grime. With Energy Suspension's polyurethane, you can protect your vehicle's ability to carry a load, and your bumpy free ride, for years to come.

Energy Hyperflex Leaf Spring
Energy Hyperflex Leaf Spring Lifespan

Replacing the Faulty Rubber

O.E. leaf spring and shackles utilize a soft rubber bushing to mount the spring to the frame. The rubber is great for reducing the noise and vibrations from being transferred into the cab. Unfortunately, rubber bushings have a short lifespan. Once the rubber fails, due to wear and tear or road grime, a leaf spring's effectiveness is severely reduced. Meaning you will experience a very bumpy ride, the vehicle's ability to carry a load or tow is hindered greatly and you'll experience a loss of control.

Be sure to use Formula 5

A leaf spring bushing rotates a lot against the metal shell, so make sure you grease it well with Energy Suspension's own Formula 5 Bushing Lubricant. Using plenty of grease is the best way to ensure a long lasting part without any squeaking. If you'd like some extra grease just in case, pick up an extra 3 pack or an 8 ounce tube.

Formula 5 Gif
Energy Suspension 4.2145

Product Reviews for 4.2145 | Rear Leaf Spring Bushings - Ford E350 Super Duty

5 Star (3)
4 Star (0)
3 Star (0)
2 Star (0)
1 Star (0)

Energy Suspension 4.2145

5 out of 5 based on 3 user reviews. Write a Review


starstarstarstarstar" Review 2 Years Later "

I wish I had used these polyurethane bushings earlier I tried conventional bushings first and they only lasted a short time less than a year. Then I bought the polyurethane and they installed in a few minutes (after the rubber ones were removed) and they are still in perfect condition in a very heavy 14k e450 super duty box truck I would highly recommend them and honestly would not ever use anything else.

verified_user Verified Buyer - - . Energy Suspension 4.2145 - 5 out of 5

starstarstarstarstar" Fantastiic !!!!!!!!!!!!! "

This made my extended van drive like it should and it is MUCH more stable !!!! I LOVE IT !!!!

verified_user Verified Buyer - - . Energy Suspension 4.2145 - 5 out of 5


This product should be used on all ford e super duty vans because it keeps the leaf springs center. You will have no regrets after bushings are installed.

verified_user Verified Buyer - - . Energy Suspension 4.2145 - 5 out of 5

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  • Bushing Material: Polyurethane