Tiny bubbles
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
I assume you checked it correctly.
The transmission needs to be HOT..thus means you need to drive it to get it hot....then...have it on level ground...in park with the engine idling.
You did not state if the level was correct.
I personally would not worry about it but I do not know how many bubbles you saw because you did not state that also. 2, 4 or 100 bubbles? Where the bubbles high on the stick at the top of the level???
DUB
The transmission needs to be HOT..thus means you need to drive it to get it hot....then...have it on level ground...in park with the engine idling.
You did not state if the level was correct.
I personally would not worry about it but I do not know how many bubbles you saw because you did not state that also. 2, 4 or 100 bubbles? Where the bubbles high on the stick at the top of the level???
DUB
Last edited by DUB; Jan 15, 2017 at 06:39 PM.
Le Mans Master
Joined: Dec 2006
Posts: 8,837
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I do not claim to know what would cause that when full.
What fluid do you use, and any additives?
Thread Starter
Instructor
Joined: Feb 2013
Posts: 192
Likes: 54
Fluid was changed in July 2015. Service record does not indicate what type fluid was used but the work was done by a reputable shop, the Corvette Center in Colorado Springs. 2,600 miles put on the car since the change.
Drifting
Joined: Aug 2009
Posts: 1,346
Likes: 160
From: new iberia la
bubbles on the stick can also be from too much fluid in the transmission. are you sure your dipstick is correct one? or sucking air around filter o-ring . Air bubbles do not lubricate.. you need to find cause
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
Contact who worked on it last and voice your concerns. I also can not add any more to what can be causing this carbonation of your fluid. But I do agree...I would have to find out what is causing it.
Possibly contact someone like Bowtie Overdrives and ask them and see if they may know...along with any local transmission shop in your area and get a consensus of what they all fell it is.
As like what 'fishslayer143' mentioned....Air leaking past the seal of the filter is a VERY PLAUSIBLE cause.
I assume this is a TH400..and if my memory serves me correctly..the filter is screwed in place with a thin paper gasket.
DUB
Possibly contact someone like Bowtie Overdrives and ask them and see if they may know...along with any local transmission shop in your area and get a consensus of what they all fell it is.
As like what 'fishslayer143' mentioned....Air leaking past the seal of the filter is a VERY PLAUSIBLE cause.
I assume this is a TH400..and if my memory serves me correctly..the filter is screwed in place with a thin paper gasket.
DUB
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Team Owner
Joined: Jan 2006
Posts: 37,637
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From: Crossville TN
"Bubbles" on the dipstick are not necessarily a cause for concern. Your transmission has a vent on the main housing. When you turn the engine off, the transmission is hot. As it cools down, outside air is drawn into the main housing, and if it is moist, it can condense some droplets of water in with the oil. But, as you know, water and oil don't mix. But, that's no big deal. When the trans gets to operating temperature the next time, most of that moisture will evaporate and then the process will start all over again. No biggie.
Now, if ANTIFREEZE had gotten into the transmission oil, that would be a very big problem. Antifreeze (ethylene glycol) doesn't mix WELL with oil...but it does mix SOME. It forms a nasty emulsion which can turn into a gummy goo; bad for the engine if it happens there---equally bad for the transmission if it happens there.
But, you don't have a foamy pick emulsion going on--you just have some water droplets on your dipstick. Situation "normal".
Now, if ANTIFREEZE had gotten into the transmission oil, that would be a very big problem. Antifreeze (ethylene glycol) doesn't mix WELL with oil...but it does mix SOME. It forms a nasty emulsion which can turn into a gummy goo; bad for the engine if it happens there---equally bad for the transmission if it happens there.
But, you don't have a foamy pick emulsion going on--you just have some water droplets on your dipstick. Situation "normal".
Last edited by 7T1vette; Jan 17, 2017 at 12:07 AM.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The only possibility of an "internal leak" would be from the engine's cooling system (radiator tank cooler for the tranny). But, the transmission's cooling lines (that run from the trans to the radiator) have much higher pressure on them then what is in the radiator; so the "leak" would be trans fluid into the engine's coolant/radiator.
Also, if you have anything other than plain ol' water in the cooling system, you wouldn't see ONLY water beads on the dipstick.
Also, if you have anything other than plain ol' water in the cooling system, you wouldn't see ONLY water beads on the dipstick.
Drifting
Joined: Aug 2009
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From: new iberia la
Racer
Joined: Mar 2014
Posts: 316
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From: Machesney Park IL
"Now, if ANTIFREEZE had gotten into the transmission oil, that would be a very big problem. Antifreeze (ethylene glycol) doesn't mix WELL with oil...but it does mix SOME. It forms a nasty emulsion which can turn into a gummy goo; bad for the engine if it happens there---equally bad for the transmission if it happens there.
