SPC 37975 Steering Knuckle Spreader Tool Ball Joint Removal 4.4-10mm Universal

Vehicle Fitment

• Universal - fits most domestic and import cars and trucks equipped with pinch-style steering knuckle designs operating within a 4.4mm to 10mm expansion slot range

Fitment Notes

• Verify that the knuckle pinch slot on the target vehicle falls within the 4.4mm to 10mm expansion range before use.
• This tool is intended for professional shop use. Improper use can result in knuckle or component damage.
• Not intended for use on knuckle designs without a pinch slot or bolt-style ball joint retention systems.

Features

• Safely expands steering knuckle pinch slots without the risk of cracking or distorting the knuckle - eliminates the need for pry bars or chisels
• Threaded adjustment nut provides controlled, incremental expansion for precise, damage-free knuckle spreading
• Expansion range of 4.4mm to 10mm covers the majority of domestic and import vehicle knuckle slot sizes
• Steel construction with black oxide finish for durability and corrosion resistance
• Compact single-unit design is easy to store and retrieve on the alignment rack or service bay
• Speeds up ball joint and control arm replacement by making stud insertion and removal straightforward and safe

Specifications

• Part Type: Steering Knuckle Spreader Tool
• Application: Universal (pinch-style knuckle designs)
• Expansion Range: 4.4mm - 10mm
• Material: Steel
• Finish: Black Oxide
• Country of Origin: Taiwan
• Quantity: Sold Individually (1 tool per purchase)
• Package Dimensions: 3.13" D x 1.50" H x 1.88" W
• Weight: 0.75 lbs

Included Components

• 1x Steering Knuckle Spreader Tool with Adjustment Nut

Product Description

The SPC 37975 is a professional-grade steering knuckle spreader designed to safely open pinch-style knuckle slots during ball joint and control arm service. When replacing a ball joint or seating a control arm stud into a knuckle, the tight tolerance of the pinch slot makes insertion difficult without spreading the opening slightly. The common workaround - using a pry bar, screwdriver, or chisel - risks cracking aluminum knuckles or distorting the slot geometry, compromising the integrity of the repair. The 37975 eliminates that risk entirely by using a threaded adjustment nut to apply controlled, even force across the slot, expanding it safely within the 4.4mm to 10mm range that covers most domestic and import applications.

Built from steel with a black oxide finish for corrosion resistance, this tool is compact enough to keep on the alignment rack and reusable across countless service jobs. It's particularly valuable for shops that frequently perform ball joint replacements, upper control arm swaps, or strut service on vehicles with tight-tolerance pinch knuckles. Sold individually as a single tool per purchase, the SPC 37975 is a straightforward, low-cost addition to any alignment or suspension service toolkit.