I have a rattle that is temperature, load, and rpm dependant. The noise only occurs once the car has been driven for several miles, is between 3,200 and 4,000 rpm, and when accellerating lightly. It seems like it only occurs in first and second gear. It sounds like it may be coming from the transmission, but is hard to pinpoint, especially since it only happens under load.
What is the failure mode for a 6 speed Mazda transmission? Are there bearings that tend to let loose before anything else that would cause the noise described above?
Full disclosure: The noise started happening after a hellacious first to second gear burnout that ended with egged rod bearings. Once those were swapped I noticed this noise.
I'm going to break out the Det cans and clip them on various spots, but figured I'd ask those more in the know; maybe this is how 6 speeds meet their end?
Sorry for the rookie question, but I have 0 experience with broken Miata transmissions. Put me in a VW with a noisy trans and I can tell you exactly what's about to let loose