Flushing Trans Fluid
Thread Starter
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Jake, except for picking the wrong line 
your instincts basically nailed it. 
Here's a link to the article. Flush
your instincts basically nailed it. Here's a link to the article. FlushYep, choosing the correct line makes all the difference, cleanup-wise. LOL
Jake
Instructor
Joined: Jan 2006
Posts: 192
Likes: 0
From: Dayton WA
To easily find the correct line, feel them both (after driving the car) and the hotter line is the line to use and it will pump directly into the "jug"...as you see it coming out, add fluid in the dipstick tube in sorta equal amounts ...I drop pan, change filter, add 5 quarts, then use the above method for 12 more...it usually works out to drain one less quart out to the jug than you replace for a full tranny..not sure why
Le Mans Master
Joined: Nov 2001
Posts: 6,984
Likes: 0
From: Central Coast CA
I'm confused, some of you say to change the filter first and some say to change it after the flush.
We have a 96 and as those of you with 96's know, there is one bolt on the trans pan that is hard to get at. How did you overcome this?
We have a 96 and as those of you with 96's know, there is one bolt on the trans pan that is hard to get at. How did you overcome this?
Thread Starter
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Can you specify which one you're referring to?
Jake
Instructor
Joined: May 2002
Posts: 145
Likes: 0
From: Long Island NY
BTW, I did this after I changed the filter.
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Racer
Joined: Jan 2005
Posts: 418
Likes: 45
From: Houston Texas
Correct me if I am wrong BUT, get two 5 gallon pails and fill one up with the appropriate amount of new ATF. Put 1 line in that bucket from the radiator that would be the suck line. Take the second line off which would be the blow line and put that in an empty 5 gallon bucket. When all the new ATF is gone out of the 5 gallon bucket shut the car off and reattach the lines?? When that is done drop the pan and replace the filter.
Still, I doubt that the gravity flow would replace the fluid as fast as the tranny pumps it out the pressure ("blow") line. You would have to stop-start several times for the gravity flow to replace the fluid pumped out of the pan. Manually adding it down the dip stick or some little electrical pump action seems the easier way to go.
I like the first part of your system - using a 5 gal bucket for the discharge. I might be inclined to pre-mark the side of the bucket in 1 gal increments just to see how much it took for the line to run clean fluid.
Race Director
Joined: Feb 2004
Posts: 12,517
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Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
I don't think the trans will actually "suck" fluid up this line; it picks up the fluid in the pan which is at the same level as the pump. Your system might work, but the "suck" bucket would have to be ABOVE the pan level, and the line primed for gravity flow.
Still, I doubt that the gravity flow would replace the fluid as fast as the tranny pumps it out the pressure ("blow") line. You would have to stop-start several times for the gravity flow to replace the fluid pumped out of the pan. Manually adding it down the dip stick or some little electrical pump action seems the easier way to go.
I like the first part of your system - using a 5 gal bucket for the discharge. I might be inclined to pre-mark the side of the bucket in 1 gal increments just to see how much it took for the line to run clean fluid.
Still, I doubt that the gravity flow would replace the fluid as fast as the tranny pumps it out the pressure ("blow") line. You would have to stop-start several times for the gravity flow to replace the fluid pumped out of the pan. Manually adding it down the dip stick or some little electrical pump action seems the easier way to go.
I like the first part of your system - using a 5 gal bucket for the discharge. I might be inclined to pre-mark the side of the bucket in 1 gal increments just to see how much it took for the line to run clean fluid.
Racer
Joined: Jan 2005
Posts: 418
Likes: 45
From: Houston Texas
Regarding the Qwiky Lube - If I want a pimple-faced knucklehead messing with my car, I'll go next door and get the neighbor's high school kid.
Your "way" was never the question; it's the only way. Rather the question was whether the "suction" line will actually pull up fluid or does the fluid have to be added manually. I suspect manually, but it sure would be easier if it did "suck".
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
Guess I don't understand what, if any, was "being a smart ***". I wouldn't go near Jiffy or any other lube place even if it was free. Some are competent, some are not. Hell, the happiest day of my new car life is when the warranty expires and I don't have to see the dealer anymore. It's not worth the risk to me having someone else (supposedly competent) fixing my car. Way too many bad experiences.
Regarding the Qwiky Lube - If I want a pimple-faced knucklehead messing with my car, I'll go next door and get the neighbor's high school kid.
Your "way" was never the question; it's the only way. Rather the question was whether the "suction" line will actually pull up fluid or does the fluid have to be added manually. I suspect manually, but it sure would be easier if it did "suck".
Regarding the Qwiky Lube - If I want a pimple-faced knucklehead messing with my car, I'll go next door and get the neighbor's high school kid.
Your "way" was never the question; it's the only way. Rather the question was whether the "suction" line will actually pull up fluid or does the fluid have to be added manually. I suspect manually, but it sure would be easier if it did "suck".
So to answer your question about if you have to add fluid manually reread my first post here.
Racer
Joined: Jan 2005
Posts: 476
Likes: 0
From: Tucson, AZ. L98-85 AUTO COUPE: 120k MILES: daily driver. SOUND OFF IF YOU'VE BEEN THERE. Ex-Jumpin' Junky-82nd Airborne-2/505 PIR: 1st ID-1/16th Inf: Recon Marine Retread. GOD BLESS GRUNTS.
i did a home made flush on my 700 that had 120k on it.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
Le Mans Master
Joined: May 2000
Posts: 7,033
Likes: 12
i did a home made flush on my 700 that had 120k on it.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
Racer
Joined: Jan 2005
Posts: 476
Likes: 0
From: Tucson, AZ. L98-85 AUTO COUPE: 120k MILES: daily driver. SOUND OFF IF YOU'VE BEEN THERE. Ex-Jumpin' Junky-82nd Airborne-2/505 PIR: 1st ID-1/16th Inf: Recon Marine Retread. GOD BLESS GRUNTS.
i agree with most of what you said--except for the part where we disagreed. but i agree with most of that too.
forgive me for the wife beating comment. i usually go out with female body builders, and believe me, you've got to establish dominance right off the bat. the succesful alternative is to use constant nagging, combined with passive aggresive behavior. that combo really throws them off--especially when they are on big-time juice. i've shagged some heffers that could definitely be called marsha maguire, or betty bonds. i like them big.
the kicker is that i only weigh 98 pounds, but i have the skinny guy gift, and have an 9 inch *******. some people would see that as a handicap, but i just see it as something to use so i don't have to pay my part of the rent. sexual exploitation cuts both ways. if you don't believe me, check out adult friend finder and ask a tranny--they give really good advice. i should know, i have two uncles who spend more cash in victoria's secret than they spend in the sport's authority store.
coy frog....
Last edited by parafrog; Aug 23, 2007 at 07:17 AM.
Le Mans Master
Joined: Mar 2004
Posts: 8,700
Likes: 298
From: Ft. Lauderdale Fl
i did a home made flush on my 700 that had 120k on it.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
i had read that old-timers advised against a full flush on high mileage trannys. but without giving a reason. most probably because they hadn't figured out why it caused problems, but had just seen that the flush causes them.
200 miles later, the tranny gave up. now it could have the tranny's time to go, or it could have been prompted by the flush.
i figure that old fluid is loaded with the residue of worn clutch plates and is some what grippy. new fluid is slick, and exposes the shiny clutches for what they are.
my advice is not to do a full flush on a high mileage tranny. just do a pan and filter change.
and don't any of you **** retentive losers start beating on me, instead do what you should be doing and beat your wife.
frog.
Pro
Joined: Oct 2007
Posts: 679
Likes: 4
From: TremontonUT UT
Tranny Flush Revisited
I just purchased my first Vette two days ago. All the fluids have been neglected especially the trans oil. I thought I would check here before flushing to see if there is anything special about the Vette verses the Allison trans in my Duramax. It seems there are several ways people are doing this that are wasting oil.
I will explain the procedure for my Allison and Vette.
1. Remove the return oil line from the oil cooler where it enters the trans. Connect a piece of the correct size rubber, Tygon hose etc. and put it into a clear container. (I use 10 quart Amsoil containers).
2. Drain the pan, change the filter and refill. The reason this is done now is this clean oil is going to push the used oil through the trans, cooler and back to your container.
3. I have the wife start the engine while I watch the container. I run three quarts at a time when doing the Allison but will only do two on the Vette. I don't know yet how many quarts it will take. I will edit this post before next weekend.
Later! Frank
I will explain the procedure for my Allison and Vette.
1. Remove the return oil line from the oil cooler where it enters the trans. Connect a piece of the correct size rubber, Tygon hose etc. and put it into a clear container. (I use 10 quart Amsoil containers).
2. Drain the pan, change the filter and refill. The reason this is done now is this clean oil is going to push the used oil through the trans, cooler and back to your container.
3. I have the wife start the engine while I watch the container. I run three quarts at a time when doing the Allison but will only do two on the Vette. I don't know yet how many quarts it will take. I will edit this post before next weekend.
Later! Frank
