Lot 8746: 2008 Ford Shelby Mustang GT500

The 2008 Shelby GT500 is generally a solid car, but there are a few known issues to watch for:

Clutch & Flywheel Problems This is the big one! There’s a Technical Service Bulletin (TSB 10-3) for clutch drag issues. Symptoms include difficulty engaging 1st and reverse gears, hard shifting, clutch chatter, and the car creeping with the clutch pedal fully depressed to the floor. The original flywheel could warp, and Ford released an updated clutch assembly to address these issues.

Spark Plug Woes Early production 2008s (built before November 2007) had problematic two-piece spark plugs that can break off in the cylinder head when you try to remove them. Check for black coil boots - those indicate the old style. Brown boots mean revised one-piece plugs are installed. If you’re buying one or doing a tune-up, factor in a potential spark plug extraction job or check the service history.

Supercharger Heat Management The stock intercooler/heat exchanger pump is a known weak point. If it fails or can’t keep up, you’ll see heat soak and reduced power. Many owners upgrade to an aftermarket heat exchanger and a more robust pump (like the Bosch brushless unit) to keep intake temps down.

Crankshaft Pulley 2007 models had a heavy harmonic balancer; 2008 got a lighter crank pulley, which was a positive change. If you’re looking at an older 2007 that was never updated, it’s something to consider.

The Good News These issues are well-documented and fixes are readily available. 2008-2009 models got improvements over the 2007 launch cars, and overall, the 5.4L supercharged V8 (the “modular” engine) is stout. With just 12,500 miles, this example is barely broken in!

Want me to check if there are any similar GT500s currently available with fewer hours on the clock? Or need help with anything else about this pony car?