Hi, have a 2000, 4WD V6, 2nd Gen SC put in about 195k miles. Now it's at 218k miles.
Truck's been running flawlessly over the years. About 1,500 miles ago, I noticed:
- A whine when putting my trans in Gear (123 or R), but the whine goes away in P or N.
- It's present in gear going up to 50ish, then the road/engine noise I guess cancels it out.
- Transmission shifts exactly as it did 14 years ago, there is NO slipping or other weird noises
- I did change the filter and fluid and ensured it was at the correct level at the correct temp with the engine running and the car in Park.
- When the fluid warms up, the whine is significantly reduced at idle in gear (but yet again, no whine when in Park/N). However, the whine sound is obvious again as you accelerate and drive up to 50ish.
- The whine noise does change pitch with engine speed and during shifts, but otherwise remains.
- When I changed the trans fluid and filter, the magnets looked pretty normal, there was some slight metallic glitter in the corner of the pan however.
If I didn't have an SC, I would actually say it did sound like an SC whine. However, if in Neutral or Park and I up the revs, there's no whine (so it's not the SC).
I did see in a post that it could be the TC:
If your transmission makes noise when you put it in gear and that noise goes away when you put it back in park or neutral that is your converter coming apart.
Any thoughts on what the problem is? I don't mind changing out the TC and even flexplate if needed. I'd hate to replace the trans if it's not needed, but I intend to keep the truck forever, so I don't mind the investment and piece of mind. Most importantly, I need to be sure it doesn't break down on a trip, so I'm willing to change whatever is needed for that piece of mind.