How to Flush Tranny Fluid?
Member
Joined: Sep 2013
Posts: 147
Likes: 0
From: Marshfield, Missouri
Year: 2001
Model: Cherokee
Engine: 4.0
heck when I drained all mine it took every bit of a gallon and a half quart....
also, while there might be a debate on changing the filter. I look at it like this. "why not"? its 20 bucks, take 2 hours of laying on your back. sure its work. but like anything if its worth doing its worth doing right. Also while it is true the trans filter is a VERY very fine wire mesh, id rather have a new one in there for peace of mind.
either way, on a high mileage transmission I was told to NOT have it flushed via shop which will use a pressurized system to "push" new fluid into the transmission.
As they said it can loosen a piece of debris only for it to come off later and clog a hydralic passage...makes sense so I did not argue.
If you are not up for the task of changing the transmission filter, the by all means just drain and re fill...and repeat.
also, while there might be a debate on changing the filter. I look at it like this. "why not"? its 20 bucks, take 2 hours of laying on your back. sure its work. but like anything if its worth doing its worth doing right. Also while it is true the trans filter is a VERY very fine wire mesh, id rather have a new one in there for peace of mind.
either way, on a high mileage transmission I was told to NOT have it flushed via shop which will use a pressurized system to "push" new fluid into the transmission.
As they said it can loosen a piece of debris only for it to come off later and clog a hydralic passage...makes sense so I did not argue.
If you are not up for the task of changing the transmission filter, the by all means just drain and re fill...and repeat.
Junior Member
Joined: Sep 2013
Posts: 84
Likes: 1
From: bayou vista
Year: 92
Model: Cherokee
Engine: 4.0
as for the "fluid exchange meathod" you could do this too. again I highly recommend changing that filter so Id start with my previous post first!
This meathod is simple. you will need at least 2 to 3 gallons of ATF fluid(check what you need for yours) just to be safe.
You will need a large bucket, or old kitchen trashcan.(something to catch alot of fluid).
you need a length of hose(could use 3/8 fuel line) its cheap about 4 foot to be safe more if needed. you will then unhook your transmission oil cooler lines from the radiator(if yours doesnt have that then you cannot proceed with the meathod unless you add them) mine are on the drivers side of the radiator. you will need to figure out which line(there are two) in the sending line(it send fluid from the tranny to the radiation to be cooled) and the return line(returns the cooled fluid to transmission)
to do that unhook both lines put a catch pan underneath. start the vehicle and have someone see which one is spewing fluid. yeah its a little messy.
once you have the sending line found attach your length of hose you bought to it and put the return line back into the radiator. run your hose into the bucket or trash can and have a buddy there to start the vehicle and while in park or neutral(choke the wheels if in neutral) once the fluid is pumping out inthe the bucket have your friend add new fluid via a funnel through the dipstick at about the same rate its coming out.
the fluid should go from dirty, to a nice deep red color in about a minute or two. if not keep doing that untill you have nice clean fluid coming out. shut the vehicle off and attach your sending line back into the radiator and done.
also here is a link to a video explaining the meathod I just described. this is pretty general and for the most part will work for "most vehicles".
10 Min Automatic Transmission Fluid Flush + Replacement (Most Cars) - YouTube
hope this helps.
This meathod is simple. you will need at least 2 to 3 gallons of ATF fluid(check what you need for yours) just to be safe.
You will need a large bucket, or old kitchen trashcan.(something to catch alot of fluid).
you need a length of hose(could use 3/8 fuel line) its cheap about 4 foot to be safe more if needed. you will then unhook your transmission oil cooler lines from the radiator(if yours doesnt have that then you cannot proceed with the meathod unless you add them) mine are on the drivers side of the radiator. you will need to figure out which line(there are two) in the sending line(it send fluid from the tranny to the radiation to be cooled) and the return line(returns the cooled fluid to transmission)
to do that unhook both lines put a catch pan underneath. start the vehicle and have someone see which one is spewing fluid. yeah its a little messy.
once you have the sending line found attach your length of hose you bought to it and put the return line back into the radiator. run your hose into the bucket or trash can and have a buddy there to start the vehicle and while in park or neutral(choke the wheels if in neutral) once the fluid is pumping out inthe the bucket have your friend add new fluid via a funnel through the dipstick at about the same rate its coming out.
the fluid should go from dirty, to a nice deep red color in about a minute or two. if not keep doing that untill you have nice clean fluid coming out. shut the vehicle off and attach your sending line back into the radiator and done.
also here is a link to a video explaining the meathod I just described. this is pretty general and for the most part will work for "most vehicles".
10 Min Automatic Transmission Fluid Flush + Replacement (Most Cars) - YouTube
hope this helps.
Thread Starter
Junior Member
Joined: Aug 2013
Posts: 42
Likes: 0
Model: Cherokee
ok, as I read more on the subject online.. it says it might not be a good idea to "flush" it, for high mileage, and fluid which is already brown (burnt).
Mine has 200K on it, what should I do..???
Mine has 200K on it, what should I do..???
Senior Member
Joined: Nov 2012
Posts: 918
Likes: 6
From: Harrisburg, Pennsylvania
Year: 1995
Model: Cherokee
Engine: 4.0L HO
If you want to then drop the pan and change the filter (after the fluid is "clean" no sense putting in a new filter with a bunch of dirty fluid in the system), again a filter change is not usually necessary on an AW4 though, but it's up to you whether you want to change it or not.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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