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#4786264 - 06/13/18 09:40 PM
How much damage was likely done?
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Registered: 09/01/08
Posts: 3802
Loc: Southeast Texas
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I bought a used Chevy Silverado (5.3) almost a year ago, just after the great Harvey flood. It had 145K miles at that time. I checked the vehicle over pretty good when I bought it, and I remember seeing nice red Trans fluid on the dipstick then.
I have since driven about 15,000 miles, and I checked the fluid again this week and found the fluid level almost 2 inches above the crosshatch mark. I don't know how I missed the overfill earlier, but I suppose I did.
I took it to an independent shop and they did a BG flush, and the fluid is now new, and at the correct level. The truck has never exhibited any trans symptoms. Shifts have always been correct. The fluid was still red at the time of change.
My question is, all things considered, how much damage (if any) was done? Should I worry much? Thanks.
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#4786265 - 06/13/18 09:42 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 08/15/08
Posts: 2973
Loc: USA
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Was the trans at operating temp and the truck on a level surface when you checked it both times?
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#4786267 - 06/13/18 09:43 PM
Re: How much damage was likely done?
[Re: Reddy45]
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Registered: 09/01/08
Posts: 3802
Loc: Southeast Texas
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Yes. Its pancake flat here where I live.
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#4786283 - 06/13/18 09:58 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 12/24/11
Posts: 4086
Loc: North Carolina
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I'd say that if no drivability concerns have manifested, you're probably fine.
_________________________
"Zed's dead baby, Zed's dead."
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#4786309 - 06/13/18 11:01 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 08/12/13
Posts: 275
Loc: Alberta
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Is it leaking in from the transfer case?
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#4786310 - 06/13/18 11:05 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 05/27/02
Posts: 1506
Loc: Southeast United States
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The problem with overfilling is that the ATF will get up into the gears and air bubbles will be created, then the air mixed with fluid will cause slippage. I doubt if 2 inches overfilled would cause any trouble at all.
_________________________
Some days you eat the bear, some days the bear eats you.....
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#4786312 - 06/13/18 11:10 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 09/01/08
Posts: 3802
Loc: Southeast Texas
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Never had any leaks. No issues ever noticed.
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#4786317 - 06/13/18 11:20 PM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 09/06/15
Posts: 5528
Loc: Kalifornia Kollective
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Really to full and it would be blowing fluid out the breather. If that never happened, no big deal 
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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#4786329 - 06/14/18 12:00 AM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 01/27/11
Posts: 479
Loc: Anaheim, CA
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Sorry, but I have to ask. Did you check the ATF with the engine running?
_________________________
1997 Maxima 175k, Delvac 15w40, Wix 51315
2004 Corolla 189k, VWB 5w20 + SSS 10w40, MGL4967
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#4786331 - 06/14/18 12:04 AM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 09/01/08
Posts: 3802
Loc: Southeast Texas
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#4786342 - 06/14/18 12:58 AM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 09/14/10
Posts: 7479
Loc: S California
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If it's not broken don't fix it.
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#4786346 - 06/14/18 01:28 AM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 09/01/15
Posts: 2189
Loc: Malaysia
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...... and I checked the fluid again this week and found the fluid level almost 2 inches above the crosshatch mark......
...... The fluid was still red at the time of change.
My question is, all things considered, how much damage (if any) was done? Should I worry much? Thanks. No damage. Move on.
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#4786368 - 06/14/18 03:56 AM
Re: How much damage was likely done?
[Re: gfh77665]
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Registered: 07/03/05
Posts: 29802
Loc: NY
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I think you'll be fine, besides, worrying about it isn't going to change a thing. Drive on.
_________________________
God Bless Our Troops
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#4786414 - 06/14/18 06:18 AM
Re: How much damage was likely done?
[Re: rooflessVW]
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Registered: 11/20/06
Posts: 18908
Loc: MA, Mittelfranken.de
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I'd say that if no drivability concerns have manifested, you're probably fine. +1 Probably nothing. It sounds like it was possibly filled to the full/Hot mark when cold. To move it up the stick that amount doesn't necessarily translate to a whole lot in the pan. I wouldn't loose any sleep over it.
_________________________
ASE L1, Master. Deutsch Meisterbrief.
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#4786428 - 06/14/18 06:42 AM
Re: How much damage was likely done?
[Re: Trav]
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Registered: 08/19/10
Posts: 5263
Loc: Champlain/Hudson Valley
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In line with what Trav just said:
So much fuss was made over checking the fluid in my auto I got the bug to check it several times during a day of local driving whenever I did a drain & fill.
I'd be careful in the first place and have done a few D&F's over the years.
I'd always find level spots to park and follow the method.
The fluid's level would dance about all day long.
I concluded the key was to let the car be still THEN do the gear range row (P to L to P SLOWLY then check level within 20 seconds).
You maybe got a false level reading
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