Why Should You Not Use Synthetic Fluid In A 4L60E?
TECH Regular
Joined: Jan 2013
Posts: 463
Likes: 179
dumping what's in the pan, refill with new then pumping a quart or 2 out the cooler the line,refilling and repeating this process until the fluid looks clean has worked well for me. i have done it on high milage units with no ill effect and will continue to do so until something fails. usually looking at what's in the bottom of the pan will determine if a flush is worth it or a waste of time.
Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!
When I was at GM still...
I designed a Flush Machine that I actually liked...
I never got to make one (GM likes their $$$ to much for unsanctioned Experiments).
I also campaigned for a new Service that would include a complete Flush... and a Filter Service.
But it was time consuming and expensive.
Steps:
-1 Remove oil pan, and filter, dump fluid... dispose of consumables.
-2 Install high flow screened Pick-up (no Filter) with a Plastic Oil Pan that has multiple drain Bolts.
-3 Perform Flush.
-4 Drain Fluid from Plastic Oil Pan using drain Bolts in to a CLEAN Jug.
-5 Remove Plastic Oil Pan and high flow screened Pick-up.
-6 Install new Filter.
-7 Install original Oil Pan with New Gasket.
-8 Set ATF level with the drained CLEAN ATF in the Clean Jug.
I designed a Flush Machine that I actually liked...
I never got to make one (GM likes their $$$ to much for unsanctioned Experiments).
I also campaigned for a new Service that would include a complete Flush... and a Filter Service.
But it was time consuming and expensive.
Steps:
-1 Remove oil pan, and filter, dump fluid... dispose of consumables.
-2 Install high flow screened Pick-up (no Filter) with a Plastic Oil Pan that has multiple drain Bolts.
-3 Perform Flush.
-4 Drain Fluid from Plastic Oil Pan using drain Bolts in to a CLEAN Jug.
-5 Remove Plastic Oil Pan and high flow screened Pick-up.
-6 Install new Filter.
-7 Install original Oil Pan with New Gasket.
-8 Set ATF level with the drained CLEAN ATF in the Clean Jug.
TECH Junkie
Joined: Dec 2012
Posts: 3,621
Likes: 1,335
From: Iowa
The filter needs to be changed
Doing a "flush" and just fluid exchange is a half-assed way to go about things
Flush it first, then drain it all, change the filter, put a new filter and clean fluid in
I hate it when people I know go get a "flush"
Doing a "flush" and just fluid exchange is a half-assed way to go about things
Flush it first, then drain it all, change the filter, put a new filter and clean fluid in
I hate it when people I know go get a "flush"
TECH Junkie
Joined: Jun 2008
Posts: 3,204
Likes: 1,391
From: Nitro Alley
O Hi, your car needs an ATF Flush.
O okay I will do it. Your Flush is now done.But what do I do with the dirty nasty Filter that is in my Transmission.O! That just stays there... all the nice clean ATF that you purchased will go through it...eventually making it all nasty again...
and bringing you right back here!
FML TECH Regular
Joined: Jan 2013
Posts: 463
Likes: 179
I know this is a GM automatic transmission forum, but some automakers (Honda) have an internal filter that cannot be changed unless you split the case. they do not have a "pan" like traditional units.
...but yes I like to drop the pan to determine if a flush is worth doing and change the filter at that time if applicable.
...but yes I like to drop the pan to determine if a flush is worth doing and change the filter at that time if applicable.
TECH Junkie
Joined: May 2012
Posts: 3,051
Likes: 716
From: Poplarville, MS
I know this is a GM automatic transmission forum, but some automakers (Honda) have an internal filter that cannot be changed unless you split the case. they do not have a "pan" like traditional units.
...but yes I like to drop the pan to determine if a flush is worth doing and change the filter at that time if applicable.
...but yes I like to drop the pan to determine if a flush is worth doing and change the filter at that time if applicable.
TECH Junkie
Joined: Jun 2008
Posts: 3,204
Likes: 1,391
From: Nitro Alley
Yes because the Vehicle was built to be a One Owner Automobile.
Trans. fails... Engine fails... just over 100,000 Miles.
Time for a new Car! Maximize those New Car Sales!!!
Every Manufacturer has now adopted this Business Model.
...********!
Trans. fails... Engine fails... just over 100,000 Miles.
Time for a new Car! Maximize those New Car Sales!!!
Every Manufacturer has now adopted this Business Model.
...********!
Designed and built to last ~100,000 miles? Definitely better than the CVT junk Nissan tossed into their vehicles.
I wonder if Nissan can figure out how to squeeze ~100,000 out of their horrible CVT transmissions yet.
I wonder if Nissan can figure out how to squeeze ~100,000 out of their horrible CVT transmissions yet.
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Verdad Gallardo Joined: May 2004
Posts: 1,593
Likes: 267
From: Halfway back on the Highway to Hell...again!
This is very true with the 6L80/90s. I sell 3 a week. Al right at the 100k mark. Some less than that because new GMs are 3yr/80, 60k mile powertrain now. But the problem is the tuning of the TCC. But that's another subject.
BTW, a trans filter can withstand alot of dirt and debris vs an engine filter.
But the idea of a flush isn't to flush some 150k mile, dirty, nasty, worn out trans. It's to maintain fresh fluid at regular service intervals. Pretty much like your engine.
BTW, a trans filter can withstand alot of dirt and debris vs an engine filter.
But the idea of a flush isn't to flush some 150k mile, dirty, nasty, worn out trans. It's to maintain fresh fluid at regular service intervals. Pretty much like your engine.
Teching In
Joined: Jan 2008
Posts: 5
Likes: 0
From: Eville IN
drained my 17 Nox at 60k,,,,it was BLACK,,,added 3qts dexVI started ,idle,rev,drive Then drained again,,added more new VI till it weaped out ,,,shifts way better now..Should do every 30k
The shift quality falls of so slow people dont notice, i think dexVI good for 3-40k,,,ATF+4 ,,,4-50k miles if all is good and NO over heating
The shift quality falls of so slow people dont notice, i think dexVI good for 3-40k,,,ATF+4 ,,,4-50k miles if all is good and NO over heating
Experts & transmission masters if you're stuck with an 8L90 in say a C7z06, how often would you suggest flushing it for best possible longevity?
Every 15k, 25k, 30k, 50k miles or something else?
Every 15k, 25k, 30k, 50k miles or something else?
