what are common problems with this car?

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Accepted Answer

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?

Lot 3114: 1989 Ford Mustang GT

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Lot 3114: 1989 Ford Mustang GT

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