6G Celicas Forums

Hard to describe the sound. Its not squealing belts. It's noticeable with windows up. Almost like a whine but gentle. And it goes away after it reaches higher speed. Any idea what it might be. I have a 1994 GT automatic with 167k.

NEED MORE INFO

-Where is the sound coming from? I'm assuming the engine bay as you mentioned it NOT being a squealing belt.
-Can you compare the sound to something (a video would be best if you could)
-Is the sound noticeable at idle?
-You say it goes away at higher speeds yet in your title is says after 15mph ... which is it?
-Title also says it goes away in 2nd, does it go away as soon as you put it in 2nd, every time?
-Any difference when it's hot or cold?

I think that's normal automatic transmission noise, mine whines in first when cold, audible under very soft acceleration, usually right before the point where the tranny shifts into 2nd at about 15mph indeed.

This post has been edited by SwissFerdi: Nov 19, 2012 - 6:18 PM

Its coming from the engine bay. If you say "wahh" like a baby that would be the best verbal description. I tried to test it again tonight and it only does it in drive. I tried to do it in 1st or 2nd gear and it never happens. It immediately goes away when the transmission shifts to second or around 15mph.Also it does it with a gradual acceleration, not a launch takeoff. It is not audible at idle. It's chilly here in germany but not freezing and it was less noticeable over the summer. Also it doesn't happen every time I drive it. My celica runs just fine and I change the oil and filter regularly.

Sounds like the planetary gearset. There are a couple of planetary gearsets in the transmission. Each one is used differently for the corresponding gear range. That is why the noise goes away after the gear range shift to 2nd.

When enough teeth wear you've basically got two cylinders trying to turn each other. They'll whine as they spin through all of the metal shavings that have been created by teeth breaking off of the gears until there aren't enough teeth to touch each other and turn the driveshafts.

It is not a normal sound to have within helical gears ... it is however normal with spur gears such as most reverse gearing. Mine does not make any noise, whining or other, in any gear.

What would be the best solution to fix it? it didn't do it this morning at all. Im wondering if it's worth taking it in to the shop.

1. Flush and fill with Syncromesh - drive it until it gives out (which could take any amount of time from days to years)
2. Find a used transmission and swap - you run the risk of not knowing how long it will last though
3. Full rebuild
4. Replace just that planetary gearset - I don't recommend this option as your spending so much money, you might as well do a full rebuild
5. Sell it and buy a lower mileage 6gc

If you have enough mechanical knowledge or have someone that does and will charge you little to nothing for labor, I would go with swapping it for a used transmission. In this case, I would probably also just do the flush, fill and drive until it becomes necessary to replace it. In the mean time try finding a low mileage transmission.

If you have some money to spend, you can probably find a beat auto trans for basically free or very little money. Grab it and have it rebuilt, then swap it.

Most of your options are pretty much common sense. It comes down to your available funds, how much your car is worth to you and how much of your funds you're willing to part with for it.

This post has been edited by Xander_X: Nov 20, 2012 - 2:47 PM