4" Tube Axle Simple Swap Kit

4" Tube Axle Simple Swap Kit

Basic heavy-duty swap kit for large-tube axles

This is the go-to kit for dropping a Dana 70HD, Dana 80, or any big-tube axle with a 4" diameter under your rig. Perfect for leaf spring swaps or spring-over conversions, it’s all business—no fluff, just the essentials. You get our heavy-duty spring perches, thick U-bolt plates with multiple pin options for dialing in your fit, and beefy U-bolts to match. We’ve even included a pair of shock brackets for 1.5" ID bushings so you’re ready to weld it up and hit the trail.

Key Features

• Part Number: R1050
• Designed for Dana 70HD, Dana 80, and other large tube axles
• Perches and U-bolt plates support 2.5" wide leaf springs
• Spring perches and plates feature multiple pin mounting options
• Shock tabs included for 1.5" ID bushings
• Ideal for spring-over or axle swap configurations

What's Included in This Kit

• 2 - Leaf Spring Plates for 2.5" springs
• 2 - Perches for 4" axle tubes (2.5" wide)
• 2 - Shock Brackets (1.5" ID)
• 4 - U-Bolts – 10" x 5/8" x 4" or 13" x 5/8" x 4"
• 4 - Tallnuts and 1/4" Hardened Washers