Maintenance Schedule 07-09 GT500

Fully aware what the manuals say for intervals however picked up a Shelby with a unknown service history. Got the oil changed, cabin filter, fuel filter, and coolant flush. Has 31.xxx is now a time to do a)tranny b)diff fluid c) brake flush?

thanks

Yes. I would be least concerned with the diff fluid, and would consider if you will be replacing the diff cover or gears in the near future and just replace the fluid at that time. My first trans fluid replacement was with Royal Purple, and initially it was better than the factory fill, but the shifting smoothness degraded over time. I replaced the RP with Mobil 1 Synthetic ATF, and it was a noticeable improvement, and it is still performing well after a couple of driving seasons. Others have had good success with AMSOIL. I flush the brake fluid every 2 or 3 years, and it is usually discolored and contaminated from moderate use. The brakes share a reservoir with the clutch system.

It's pretty easy to tell if the brakes need a flush, the reservoir fluid should look clear. If it's dark or has a tint to it, just flush it.
Also, I'd recommend pulling the spark plugs and replace them if needed.
Cheers.

Your brake fluid may be very dark or black and it may be hard to even see the level of the fluid from the outside. If so your clutch dust is mixed in it. If that is the case get the kit to separate the clutch from the brake reservoir - each will then have their own reservoir. I think it is like $90. You can change the brake and clutch fluid once the two systems are separate but your clutch system will get dirty again very quickly - no way to really stop it without changing the hydraulic assembly. It probably doesn't really hurt the clutch system...deal with it when you replace your clutch. You don't want that clutch dust in your brake system though...flush brake system and clean out reservoir completely. On mine my brake system fluid is now always clean but my clutch system fluid gets dirty almost immediately and I just flush the reservoir every few months now. For brake and clutch fluid use that new Bosch ESI6 fluid (RockAuto has it cheap) unless you track your car and need something even better. I switched all my cars to this new fluid since it has good properties and an extended service life.

Bad500Chris said:

It's pretty easy to tell if the brakes need a flush, the reservoir fluid should look clear. If it's dark or has a tint to it, just flush it.
Also, I'd recommend pulling the spark plugs and replace them if needed.
Cheers.

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^^^Yes.......I always say, if it looks like Pee, all is well, if it looks like Tea it needs changing, if it looks like Root Beer or Coffee, it is Wayyy past needing changing......

R