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How much damage was likely done?
#4786264
06/13/18 08:40 PM
06/13/18 08:40 PM
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Joined: Sep 2008
Posts: 3,960
Southeast Texas
gfh77665
OP
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OP
Joined: Sep 2008
Posts: 3,960
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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Re: How much damage was likely done?
[Re: gfh77665]
#4786283
06/13/18 08:58 PM
06/13/18 08:58 PM
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Joined: Dec 2011
Posts: 4,978
North Carolina
rooflessVW
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Joined: Dec 2011
Posts: 4,978
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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Re: How much damage was likely done?
[Re: gfh77665]
#4786309
06/13/18 10:01 PM
06/13/18 10:01 PM
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Joined: Aug 2013
Posts: 384
Alberta
tcp71
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Joined: Aug 2013
Posts: 384
Alberta
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Is it leaking in from the transfer case?
2016 F150 Eco: Edge 0w40
2005 Sienna 3.3: mobil 0w40 (varies)
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Re: How much damage was likely done?
[Re: gfh77665]
#4786310
06/13/18 10:05 PM
06/13/18 10:05 PM
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Joined: May 2002
Posts: 1,510
Southeast United States
TheLoneRanger
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Joined: May 2002
Posts: 1,510
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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Re: How much damage was likely done?
[Re: gfh77665]
#4786317
06/13/18 10:20 PM
06/13/18 10:20 PM
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Joined: Sep 2015
Posts: 6,022
Kalifornia Kollective
BrocLuno
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Joined: Sep 2015
Posts: 6,022
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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Re: How much damage was likely done?
[Re: gfh77665]
#4786329
06/13/18 11:00 PM
06/13/18 11:00 PM
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Joined: Jan 2011
Posts: 612
Anaheim, CA
zorobabel
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Joined: Jan 2011
Posts: 612
Anaheim, CA
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Sorry, but I have to ask. Did you check the ATF with the engine running?
1997 Maxima 190k, QSGB 5w30+QSUD 5w30 (2:1), PL14477
2004 Corolla 193k, VWB 5w20 + SSS 10w40, MGL4967
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Re: How much damage was likely done?
[Re: gfh77665]
#4786346
06/14/18 12:28 AM
06/14/18 12:28 AM
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Joined: Sep 2015
Posts: 2,420
Malaysia
zeng
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Joined: Sep 2015
Posts: 2,420
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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Re: How much damage was likely done?
[Re: gfh77665]
#4786368
06/14/18 02:56 AM
06/14/18 02:56 AM
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Joined: Jul 2005
Posts: 30,815
NY
demarpaint
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Joined: Jul 2005
Posts: 30,815
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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Re: How much damage was likely done?
[Re: rooflessVW]
#4786414
06/14/18 05:18 AM
06/14/18 05:18 AM
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Joined: Nov 2006
Posts: 20,349
MA, Mittelfranken.de
Trav
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Joined: Nov 2006
Posts: 20,349
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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Re: How much damage was likely done?
[Re: Trav]
#4786428
06/14/18 05:42 AM
06/14/18 05:42 AM
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Joined: Aug 2010
Posts: 5,830
Champlain/Hudson Valley
Kira
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Joined: Aug 2010
Posts: 5,830
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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