Oldcrow

I just picked up a 2013 Impala LTZ<O</O
I have almost 30,000 miles on and my old school thinking it's due for a change.<O></O>
This 6T70 does not have the traditional pan on the bottom but on the side which I assume the filter is located.<O></O>
Anyone changed fluid and filter on this transmission you care to share any tips<O></O>

tech2

I've never changed one for this trans but I do believe you are correct; it is on the side. What I have been told from higher ups at my dealership; gm will allow the filter to not be changed as long as complete fluid exchanges are performed. So that is what we are doing.
A lot of other trans makers don't even have a depth filter in the unit but rather a screen.


whatever you decide, the first fluid change will remove approx. 80 to 90% of particles and debris from assembly, break-in and wear that circulate throughout the life of the transmission. Glad to see someone doing the most important fluid change early.

Oldcrow

In bold is exactly why I would like to change the filter the first fluid change.
I would not have an issue changing just the fluid the next service.
Only thing that has me concerned is the wiring that goes through the filter cover, not sure what I would be getting myself into

tech2

I spoke to a coworker who is a trans rebuilder. the filter is not meant to be serviceable. you have to open the transmission case to remove it. This would mean complete removal from the car and then split open at a work station. It is only meant to be changed during a rebuild.

Oldcrow

That explains why when I talked to parts department you can not buy the filter separately, you have to buy a complete transmission seal kit.


So just dump the fluid and replace, simple as that?

tech2

you will only get 1/2 the fluid out by dropping the drain plug. You could drain it, fill it, drive it for a week and repeat.


Another option is to pull off the top trans cooler line at the rad, put a hose over the metal tube and direct the tube to a waste container. run the trans till 3 liters comes out then stop. refill...repeat until 12 to 15 liters total is expelled.

Oldcrow

So the top line is the return line?


I did the same thing when changing transmission fluid in my 05 Suburban

tech2

then you will be familiar with chevy cooler line quick connects.


again I haven't worked on this model. All gm's that I have worked on: will flow from the trans to the top of the rad and out the bottom connection at the rad and back to the trans. Its easier to direct the flow into the waste container using the top hose and its easier access, that's why I go there.

Oldcrow

I'm 100% positive the top line is the return to the transmission on my 13 Impala and 05 Suburban.


Am concerned if I pull the return line and divert fluid to a drain pan is something not going to get lubricated in the transmission?

sledge.impy

Well T2 said this below. So 3L at a time you should be fine.

I've never done this - but couldn't you disconnect the bottom line and put it in a big tub of fresh fluid of say 20L??





Old 07-21-2014, 10:12 PM
tech2 tech2 is offline
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you will only get 1/2 the fluid out by dropping the drain plug. You could drain it, fill it, drive it for a week and repeat.


Another option is to pull off the top trans cooler line at the rad, put a hose over the metal tube and direct the tube to a waste container. run the trans till 3 liters comes out then stop. refill...repeat until 12 to 15 liters total is expelled.