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How much damage was likely done? #4786264
06/13/18 09:40 PM
06/13/18 09:40 PM
Joined: Sep 2008
Posts: 3,886
Southeast Texas
gfh77665 Offline OP
gfh77665  Offline OP
Joined: Sep 2008
Posts: 3,886
Southeast Texas
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.

Re: How much damage was likely done? [Re: gfh77665] #4786265
06/13/18 09:42 PM
06/13/18 09:42 PM
Joined: Aug 2008
Posts: 3,150
USA
Reddy45 Offline
Reddy45  Offline
Joined: Aug 2008
Posts: 3,150
USA
Was the trans at operating temp and the truck on a level surface when you checked it both times?

Re: How much damage was likely done? [Re: Reddy45] #4786267
06/13/18 09:43 PM
06/13/18 09:43 PM
Joined: Sep 2008
Posts: 3,886
Southeast Texas
gfh77665 Offline OP
gfh77665  Offline OP
Joined: Sep 2008
Posts: 3,886
Southeast Texas
Yes. Its pancake flat here where I live.

Re: How much damage was likely done? [Re: gfh77665] #4786283
06/13/18 09:58 PM
06/13/18 09:58 PM
Joined: Dec 2011
Posts: 4,729
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,729
North Carolina
I'd say that if no drivability concerns have manifested, you're probably fine.


"Zed's dead baby, Zed's dead."
Re: How much damage was likely done? [Re: gfh77665] #4786309
06/13/18 11:01 PM
06/13/18 11:01 PM
Joined: Aug 2013
Posts: 328
Alberta
tcp71 Offline
tcp71  Offline
Joined: Aug 2013
Posts: 328
Alberta
Is it leaking in from the transfer case?

Re: How much damage was likely done? [Re: gfh77665] #4786310
06/13/18 11:05 PM
06/13/18 11:05 PM
Joined: May 2002
Posts: 1,510
Southeast United States
TheLoneRanger Offline
TheLoneRanger  Offline
Joined: May 2002
Posts: 1,510
Southeast United States
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.....
Re: How much damage was likely done? [Re: gfh77665] #4786312
06/13/18 11:10 PM
06/13/18 11:10 PM
Joined: Sep 2008
Posts: 3,886
Southeast Texas
gfh77665 Offline OP
gfh77665  Offline OP
Joined: Sep 2008
Posts: 3,886
Southeast Texas
Never had any leaks. No issues ever noticed.

Re: How much damage was likely done? [Re: gfh77665] #4786317
06/13/18 11:20 PM
06/13/18 11:20 PM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
Really to full and it would be blowing fluid out the breather. If that never happened, no big deal smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: How much damage was likely done? [Re: gfh77665] #4786329
06/14/18 12:00 AM
06/14/18 12:00 AM
Joined: Jan 2011
Posts: 552
Anaheim, CA
zorobabel Offline
zorobabel  Offline
Joined: Jan 2011
Posts: 552
Anaheim, CA
Sorry, but I have to ask. Did you check the ATF with the engine running?


1997 Maxima 181k, Edge 10w30, K&N HP-1003
2004 Corolla 191k, VWB 5w20 + SSS 10w40, MGL4967
Re: How much damage was likely done? [Re: gfh77665] #4786331
06/14/18 12:04 AM
06/14/18 12:04 AM
Joined: Sep 2008
Posts: 3,886
Southeast Texas
gfh77665 Offline OP
gfh77665  Offline OP
Joined: Sep 2008
Posts: 3,886
Southeast Texas
Yes.

Re: How much damage was likely done? [Re: gfh77665] #4786342
06/14/18 12:58 AM
06/14/18 12:58 AM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
If it's not broken don't fix it.

Re: How much damage was likely done? [Re: gfh77665] #4786346
06/14/18 01:28 AM
06/14/18 01:28 AM
Joined: Sep 2015
Posts: 2,256
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,256
Malaysia
Originally Posted By: gfh77665
...... 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.

Re: How much damage was likely done? [Re: gfh77665] #4786368
06/14/18 03:56 AM
06/14/18 03:56 AM
Joined: Jul 2005
Posts: 30,415
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,415
NY
I think you'll be fine, besides, worrying about it isn't going to change a thing. Drive on.


God Bless Our Troops

Re: How much damage was likely done? [Re: rooflessVW] #4786414
06/14/18 06:18 AM
06/14/18 06:18 AM
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
Originally Posted By: rooflessVW
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.
Re: How much damage was likely done? [Re: Trav] #4786428
06/14/18 06:42 AM
06/14/18 06:42 AM
Joined: Aug 2010
Posts: 5,648
Champlain/Hudson Valley
Kira Offline
Kira  Offline
Joined: Aug 2010
Posts: 5,648
Champlain/Hudson Valley
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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