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Another vote for getting the axles first… Do what everyone used to do in the original 80’s-90’s 5.0 movement - use a set of “spare tire rims” up front with proper race skinnies on them to drop weight… IMO, the axles are more important…

Have you pulled the spark plugs to also check their condition?

Just because a TSB has certain year range on it doesn’t mean it can’t be applied to a model year not listed or a vehicle that was built outside of “xx/xx/xxxx”. If the car has the same transmission, is having similar drivability issues AND it can be proven/documented via a test drive with a...

Usually with a EFI fuel pump setup you could bypass the entire car, tap the pump wires direct with a power source to see if the fuel pump(s) will fire off or not. If you’re tapping it directly with a power source and the pump doesn’t fire off then it’s certain the lump(s) is dead.

Hit up Cargurus app or website, set the location to “nationwide”, plug in Ford Mustang, plug in year range then skip to I think it is called “trim” and just select Mach 1. That should give you all the results for the S550 Mach 1. I like using CG because it has a great search engine, great ease...

The entire chassis and interior components are interchangeable from 2015-2017, regardless if it’s a V6, EB or GT. And to clarify on that, what I mean is if you get aftermarket components that are for a GT they can be bolted up to your V6…where in some instances it’s a direct swap with no mods...

In the event you don’t know, be careful with those bolts - they are known to snap…. Looks like yours may have been removed before (or an attempt to remove) because there’s a lot of paint chipping around the exterior of the bolt edges… 13 pages of broken hood bolt tech and pics...

@GT Pony Here ya go, I had posted the charts a while back. First post in this thread has the original Ford Coolant charts and the most updated charts are on Page 2. https://www.mustang6g.com/forums/threads/ford-motorcraft-coolant-spec-info.139849/ It can be confusing because for whatever...

Brake pads can last a long time especially if it’s a manual transmission vehicle.

Unfortunate…. That’s an easy way to get out of an S650 and back into an S550…. 😁

Yep, another 10R80 TSB update (the 10R80 TSB link in 1st post, page 1 of this thread has been updated too). 24-2101 attached

Yep, another update. Attached is TSB 24-2101

Good tech/testing info shared - thanks for posting because this seems to be a repeated issue with S550’s.

Post up any car Classic or current car chase video, does not have to have any Mustangs, it can be from any era, any car, any where. M6Gers how many can we get into a single thread… Be sure to post the name (if applicable) and the vid Here’s some classics: COBRA: Duel: Steel Arena: The...

Usually with a slow start it could be 1 of 2 things: - high resistance within a wiring harness that is causing a short - bad starter. There’s been threads in here about S550 starters going out. Today's mechanical parts don’t last. So If you can’t find any issues with the wiring, the...

Have you tried pulling the crank sensor out to see if the sensor head is damaged? Have you checked the wiring harness and connector to it? Some have found that the pins in the connector were loose or wires got chafed. I’ve seen on here where folks who had trouble with the crank relearn have...

Definitely an interesting design and it’s good that the carrier inserts can be replaced too.

If you’re into a Mach 1, then just go to cargurus or similar sites, open up the search criteria to nationwide and filter it only on the Mach 1. You will find them for far less… I mean why lay $65k when there too many listed for much less… Screw that dealer - $65k for a used Mach 1? Search…...

Buy an extra engine and store it…. :)

But but but…. He won’t fix it because in some years he’s sitting on a Meeeeellion dollas because he has the only S550 with mismatched taillights….. LOL (I’d fix it too…)