Lot 3114: 1989 Ford Mustang GT

Great question! The ‘89 Mustang GT is a Fox body icon, but at 37 years old, there are several areas you’d want to inspect closely. Here’s what to watch for:

Structural & Rust (Most Critical)

Fox bodies are notorious rust buckets if not properly cared for:

• Strut tower rot – Check the base where the strut towers meet the frame rails. This is a safety-critical area that can compromise handling
• Torque boxes – These take engine/transmission torque; corrosion here is serious and expensive to fix
• Front frame rails – Especially beneath the shock towers
• Rocker panels – Behind the doors
• Cowl area – Where water collects
• Windshield corners – Common leak points

Given this car is described as “Original & Highly Original” with a clean Carfax, check carefully for any past rust repairs.

Engine & Electrical

• TFI module failure – The Thick Film Ignition module on the distributor is a very common culprit. Symptoms: car dies randomly, hard starts when hot, stalling
• Idle hunting/roughness – Common on fuel-injected 5.0Ls, could be vacuum leaks, IAC valve, or sensor issues
• Cooling fan issues – Electric fans can stick on and drain the battery

AOD Transmission

• Shift quality issues – The AOD can act weird between Drive and Overdrive
• Harsh or delayed shifts – May need adjustment or internal wear check
• Transmission cooler line leaks – Common at the radiator quick-disconnects

Convertible-Specific

• Hydraulic top pump/motor – These wear out and are a common failure point
• Hydraulic cylinders – Can leak, causing slow/no top operation
• Header seal leaks – Allows water intrusion

The Good News

The 5.0L HO is robust with great aftermarket support, and parts are plentiful and affordable. Most of these issues are manageable for a DIYer!

Would you like me to help you find more Fox body GT convertibles to compare, or do you have questions about inspecting this specific car?