What do you guys think about this whine?
This is your average 5 speed, front-wheel drive tranny in a car.
The noise:
* 1st gear only
* higher pitch than reverse and quieter
* only present under load in 1st, silent when coasting in gear and on overrun(engine braking)
A lot of folks would say the bearings closest to 1st gear. But wouldn't that make noise under load in both directions? As in accelerating and overrun?
I think wear on the tooth face, but not the back of the teeth, for the 1st gearset makes sense. That would explain the noise only when loaded in one direction. What do you think? And how could this condition develop in an otherwise healthy trans?
I have already changed out the fluid and filled with MT90, which made no difference. The old fluid was clear and showed no metal debris. The car is at 102k miles and has been well maintained.
This is your average 5 speed, front-wheel drive tranny in a car.
The noise:
* 1st gear only
* higher pitch than reverse and quieter
* only present under load in 1st, silent when coasting in gear and on overrun(engine braking)
A lot of folks would say the bearings closest to 1st gear. But wouldn't that make noise under load in both directions? As in accelerating and overrun?
I think wear on the tooth face, but not the back of the teeth, for the 1st gearset makes sense. That would explain the noise only when loaded in one direction. What do you think? And how could this condition develop in an otherwise healthy trans?
I have already changed out the fluid and filled with MT90, which made no difference. The old fluid was clear and showed no metal debris. The car is at 102k miles and has been well maintained.