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When to change ATF/filter in 5.3 #4504468
09/01/17 01:04 PM
09/01/17 01:04 PM
Joined: Apr 2017
Posts: 426
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 426
Mississippi
Son has '10 Avalanche w/94K miles. To my knowledge, its never been changed. He doesn't off road it or tow, but its creeping up on 100k.

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4504509
09/01/17 01:33 PM
09/01/17 01:33 PM
Joined: Jun 2002
Posts: 19,525
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,525
Iowegia - USA
Change filter after doing a drain and refill two times.

I.e., change filter on the third drain-refill.


Scars remind us of where we have been, but do not have to dictate where we are going.
Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4504605
09/01/17 03:25 PM
09/01/17 03:25 PM
Joined: Mar 2008
Posts: 7,346
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 7,346
USA
Does that transmission have a drain plug? If it doesn't, get the Dorman pan that has one.

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4504675
09/01/17 04:31 PM
09/01/17 04:31 PM
Joined: Dec 2013
Posts: 2,098
socal
barkingspider Offline
barkingspider  Offline
Joined: Dec 2013
Posts: 2,098
socal
Change the filter and Dex vi now


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4504793
09/01/17 06:25 PM
09/01/17 06:25 PM
Joined: Aug 2011
Posts: 3,264
n.c.
gman2304 Offline
gman2304  Offline
Joined: Aug 2011
Posts: 3,264
n.c.
I should change the transmission filter on my 2005 avalanche. As far as I know its the original filter. Just rolled over 190,000 miles. I have siphoned and filled it several times . No transmission drain on my 2005. Does anyone have any experience with the Dorman pan? I might get around to it this winter.

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4504953
09/01/17 09:36 PM
09/01/17 09:36 PM
Joined: Aug 2011
Posts: 3,264
n.c.
gman2304 Offline
gman2304  Offline
Joined: Aug 2011
Posts: 3,264
n.c.
The Dorman pans got middle of the road reviews on Amazon. Probably weld a drain plug in my pan when I do this job.

Re: When to change ATF/filter in 5.3 [Re: gman2304] #4504967
09/01/17 10:02 PM
09/01/17 10:02 PM
Joined: Sep 2010
Posts: 7,508
Texas & Global
4WD Offline
4WD  Offline
Joined: Sep 2010
Posts: 7,508
Texas & Global
B&M aftermarket plug in my 4L60e pan - $10 or so - toss the nylon seal and use copper washers - on my ramps it drains 4 quarts clean and easy - once you put a new pan filter in - just do that a couple times and then once a year during oil change ...



2018 Chevy 1500 Z71 4WD
2017 Chevy Tahoe LT 4WD
2014 Fusion Hybrid Titanium
2013 Cruze LTZ - RS Turbo
Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4505446
09/02/17 11:59 AM
09/02/17 11:59 AM
Joined: Nov 2013
Posts: 362
Fly-over country
zuluplus30 Offline
zuluplus30  Offline
Joined: Nov 2013
Posts: 362
Fly-over country
I generally do fluid every 50k and fluid/filter at every 100k. I tow quite a bit and the fluid always looks good. I could probably go closer to 75-100k but it makes me feel better. Cheapest Dex VI I can find (usually Supertech). Never had a trans problem ever.

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4505526
09/02/17 01:27 PM
09/02/17 01:27 PM
Joined: Apr 2017
Posts: 426
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 426
Mississippi
So would you guys pump it out and not bother with filter or change out everything.

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4506187
09/03/17 10:33 AM
09/03/17 10:33 AM
Joined: Dec 2006
Posts: 1,788
NY, NY
NYEngineer Offline
NYEngineer  Offline
Joined: Dec 2006
Posts: 1,788
NY, NY
That truck has the six speed in it, correct? Not only should he change the fluid and filter, he should add an auxiliary trans cooler if it doesn't already have one.
My 2009 Suburban has had the fluid and filter changed at 9,000 miles (when I bought it), 50,000 miles and 100,000 miles. At around 125,000 miles, I found the fluid was brown and burned. I had the trans shop flush and service. Last month, at 139,000 miles, it wasw slightly burnt again. Shop flushed, serviced and added a factory cooler. Inside of the trans looked ok.
With the cooler, as small as it is, the trans temps are nice and low, like 174 degrees at 70 mph on a 78 degree day. Fluid seems to be lasting fine. We'll see as I rack up some miles.
I'd like to hold off on a rebuild if I can as it costs about 3500 dollars.
Also, tell him to drive that truck around in M5 and not D. It keeps the engine in V8 mode and not that stupid four cylinder thing that fails and destroys the cam. I drive mine in M5 all the time and it runs great.
My brother's 2007 Tahoe had one of those controlled intake lifters fail. It destroyed the cam. You have to remove the heads to change lifters in that engine so we swapped the entire engine. We replaced the four DOD lifters with regular intake lifters and he had the system programmed out of the computer. Truck has been stellar ever since. He drives it every day as it's his work/ family vehicle.

Last edited by NYEngineer; 09/03/17 10:36 AM.
Re: When to change ATF/filter in 5.3 [Re: NYEngineer] #4506219
09/03/17 10:54 AM
09/03/17 10:54 AM
Joined: Apr 2017
Posts: 426
Mississippi
Speak2Mountain Offline OP
Speak2Mountain  Offline OP
Joined: Apr 2017
Posts: 426
Mississippi
thx, by. Currently he's in an engineering program at M SU, and driving a ton. Anymore, insight will help

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4506518
09/03/17 05:29 PM
09/03/17 05:29 PM
Joined: Dec 2006
Posts: 1,788
NY, NY
NYEngineer Offline
NYEngineer  Offline
Joined: Dec 2006
Posts: 1,788
NY, NY
The only other helpful thing I can think of is change the plugs and wires if it hasn't been done. The rear passenger side one is a beast but it really makes them run sweet.
Also, keeping a fresh air filter in it makes a small but noticeable difference.

Re: When to change ATF/filter in 5.3 [Re: MolaKule] #4602306
12/13/17 06:32 AM
12/13/17 06:32 AM
Joined: Jan 2017
Posts: 107
Europe
Ether Offline
Ether  Offline
Joined: Jan 2017
Posts: 107
Europe
Originally Posted By: MolaKule
Change filter after doing a drain and refill two times.

I.e., change filter on the third drain-refill.



Sorry for resurrecting an old thread,but can anyone explain the merits of doing this please.I had heard of it before when changing the ATF in very old transmissions,but i don't recall the reasons as to why,or why not.(I am genuinely interested)

Re: When to change ATF/filter in 5.3 [Re: Speak2Mountain] #4602421
12/13/17 09:23 AM
12/13/17 09:23 AM
Joined: May 2012
Posts: 5,680
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,680
Fort Lauderdale, FL
I, myself , have changed my policy after seeing too many good transmissions that were just disgusting with the metal sludge in the pan. Nothing was wrong with the transmissions. All went on to live long and healthy lives. It's just that over 80k+ miles, these things shed a lot of metal, and I'd rather clean all of that out than leave it running around in there.

Magnets need to be cleaned as well in order to stay effective. When you do a drain and fill, none of this is being taken care of.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: When to change ATF/filter in 5.3 [Re: DoubleWasp] #4602426
12/13/17 09:27 AM
12/13/17 09:27 AM
Joined: Dec 2005
Posts: 10,326
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,326
Upper Midwest
The “sludge” is metal? I thought that was clutch material?

Originally Posted By: DoubleWasp
I, myself , have changed my policy after seeing too many good transmissions that were just disgusting with the metal sludge in the pan. Nothing was wrong with the transmissions. All went on to live long and healthy lives. It's just that over 80k+ miles, these things shed a lot of metal, and I'd rather clean all of that out than leave it running around in there.

Magnets need to be cleaned as well in order to stay effective. When you do a drain and fill, none of this is being taken care of.


1994 BMW 530i, 238K
1996 Honda Accord, 266K
1999 Toyota Sienna, 407K
2000 Toyota ECHO, 280K
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