Truck's rear tires skip/hop during sharp turns when bobtail, with no obvious cause found, potentially a differential or inter-axle diff lock issue.

No simple diagnostic tool to confirm partial differential lock engagement or inter-axle diff lock issues without teardown; current checks (visual, oil, spinning wheels) inconclusive.

Severity

3Medium

Willingness to Pay

implied

Added

May 16, 2026

Implied Software Gaps

Diagnostic tool that can pinpoint partial differential lock or solenoid issues without physical teardown

App Concept

DiffDiag Pro

A portable diagnostic tool that plugs into the truck's CAN bus and differential sensors to detect partial lock engagement, solenoid faults, and driveline binding. It provides a clear pass/fail report, saving hours of manual inspection and avoiding unnecessary teardowns.

Key Features

Real-time monitoring of differential lock actuator status
Automated test sequence for power divider and inter-axle diff
CAN bus data logging with fault code interpretation
Mobile app with step-by-step troubleshooting guide

Target Users: Truck drivers and fleet maintenance shops in the trucking and logistics industry, particularly those managing heavy-duty tractors like Freightliner Cascadia.

Revenue Model: $199 one-time hardware purchase + $9.99/mo subscription for data analysis and firmware updates

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