I have a 98 ES300. When it's cold in the morning, I notice that when I put it into reverse, it makes a sound like there's sand or a milder "grinding" sound in the trans (almost sounds there's a lot of dirt or something swimming around) . It's not a loud noise, but definitely noticeable. It's especially noticeable as back out of my driveway while braking. The noise is there in forward as well, but it seems like it's not as loud. If I put the car in neutral the noise stops.
If I let off the brake and let the car rolland start to take off the noise lessens and then goes away once I hit 10-15 MPH. It doesn't do it once the car gets warm.
1) Any idea if I might have a serious problem or is this something a transmission flush (or something like that) will take care of?
2) My Lexus dealer offers a special trans flush where the keep pumping trans fluid through the tranny until it comes out clean. Anybody know if the is A) safe (won't blow any seals) an B) is it really effective?
Thanks all,
Bill