Probes/MX-6s have extremely sh*tty automatics. I had an aftermarket transmission cooler and added an ATF treatment to my fluid and I was aight, but yes, I did have slippage problems around 90k and a refusal to go into reverse. After the cooler and treatment, I had no more problems.
As far as their aftermarket goes, yeah, it's a bit limited, but there's really nothing you can't get for them. Your options are just a bit smaller than for other cars. There are a couple of Probe/MX-6 only places out there, the biggest one being Probesport Racing Development... PRD sells about anything you'd want for the cars. But GReddy, Borla, Pacesetter, etc have products for them as well. Just takes a little more looking than, say, for a Civic.
