Parabolic Leaf Spring Rear Suspension

Original price was: $1,165.00.Current price is: $1,048.00.

Total Cost Involved Engineering’s 1935-1940 Ford Leaf Spring kit. These American-made Parabolic leaf springs are a modern implementation of traditional parabolic leaf springs. This is characterized by fewer leafs whose thickness varies from center to end following a parabolic curve. In this design, inter-leaf friction is unwanted, and therefore there is only contact between the springs at the ends and at the center where the axle is connected. The primary benefit of parabolic springs is better ride quality and not being as “stiff” as conventional “multi-leaf springs”. As an added bonus there are fewer springs that offer 28% weight savings over the 5-leaf kit previously offered.

This 1935-1940 Ford Leaf Spring kit includes everything needed to install a brand-new suspension into your vehicle’s rear.  Everything that attaches to the chassis bolts into place. There is minimal drilling involved and we reuse factory holes as often as possible to make the installation all the easier. Your axle housings will only need welding (unless a complete Currie 9″ is purchased directly from us). The only welding required will be on your axle housing(unless a complete Currie 9″ is purchased directly from us).

All TCI Engineering products come with our Dual Warranty. 6 Year, 60,000 Mile Warranty on wear and tear items like bushings, coil-overs, & ball joints. Any items built in-house by TCI Engineering such as link bars, control arms, spindles, crossmembers, etc come with a Lifetime Warranty.

  • Parabolic Leaf Springs
  • Shock Mounts
  • Front frame brackets
  • Shackle Brackets
  • 5 Hole plates
  • U-bolts
  • Axle brackets
  • Painted Shocks
  • Dogbones
  • Polyurethane Bushings
  • All required Hardware
  • Detailed Installation manual
  • Parabolic springs offer greater flexibility which promotes ride quality
  • 28% weight savings over conventional springs
  • They will not rob your classic truck of performance
  • 4” Lowered stance and center of gravity
  • True bolt-in with no cutting into the bed required
  • All heli-arc welded for the highest quality & strength

Install Sheet

Warning Prop65
Read Testimonial 1

Read Testimonial 2

Read Editorial 1

Read Editorial 2

Read Editorial 3

YouTube Video 1

YouTube Video 2