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Automotive RepairRepair and Maintenance Decisions5CriticalDIY Mechanic / Hobbyist$ implied

Extremely difficult to remove a seized ball joint from a car's knuckle due to rust and corrosion, despite using multiple extraction methods and tools.

Existing tools and methods are ineffective for severely seized/rusted ball joints, requiring multiple attempts and still failing to remove the part, leading to extreme frustration and wasted time.

Severity

5Critical

Willingness to Pay

implied

Added

Apr 23, 2026

Workarounds Described

cut off most of the castle nut and used a scissor type ball joint separator
air hammer with fork attachment
heat the knuckle and hit as hard as I can while loaded

App Concept

RustBuster Pro

A specialized chemical and mechanical tool kit designed to break the bond of rust-seized ball joints and similar suspension components. Combines a penetrating lubricant with a vibration-impact tool that targets the joint seam, plus a hydraulic wedge attachment to apply controlled force. Saves hours of labor and avoids damage to surrounding parts.

Key Features

Penetrating lubricant with micro-vibration to carry it into tight spaces
Air-over-hydraulic wedge tool that applies 10 tons of spreading force
Interchangeable adapters for different ball joint designs
Integrated heating element to thermally shock the joint

Target Users: Professional auto mechanics, DIY mechanics, and automotive repair shops dealing with rusted suspension components in salt-belt states or older vehicles.

Revenue Model: $299 per kit (one-time purchase) with $19.99 refill lubricant bottles

Existing Solutions Mentioned

BP plasterscissor type ball joint separatorair hammer with fork attachmentheathammer

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