Fluid Change
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Member
Joined: Dec 2000
Posts: 93
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From: Hattiesburg, MS. ,USA
Fluid Change
When changing trans. fluid. Which is the preferred method ? Drop the pan and drain torque. Or flush and fill. The quick change shops seem to go for the flush and fill method. Which may not be the best.
Senior Member
Joined: Mar 2000
Posts: 1,740
Likes: 22
From: SE Florida, USA
I have seen a study on 3,000 transmission fluid changes that showed the flush method changed 95% of the fluid. That's at least as good as dropping the pan and draining the torque converter.
They way they mesued the amount of change was to analyze the fluid before and after the change. Contaminants in the flujid after the change (and a little time to circulate the new fluid) were reduced 95%.
I used ot drop the pan and drain the converter. Now I do my own version of the flush method. The only difference between my method and the shop's method is I don't have a machine to install the new fluid as the old fluid is removed. I have to pour it down the dipstick tube.
Mark
They way they mesued the amount of change was to analyze the fluid before and after the change. Contaminants in the flujid after the change (and a little time to circulate the new fluid) were reduced 95%.
I used ot drop the pan and drain the converter. Now I do my own version of the flush method. The only difference between my method and the shop's method is I don't have a machine to install the new fluid as the old fluid is removed. I have to pour it down the dipstick tube.
Mark
Senior Member
Joined: Mar 2000
Posts: 1,740
Likes: 22
From: SE Florida, USA
No, I can't. I start the engine and wait until I get a little bit of air pumping out. Then I shut the engine off and pour in as much as I just pumped out. Repeat until the fluid coming out is as red as the new fluid.
It's also a good idea to move the shifter to every position (PRND21) at least once while the engine is running to get all the fluid there, too.
Mark
It's also a good idea to move the shifter to every position (PRND21) at least once while the engine is running to get all the fluid there, too.
Mark
Senior Member
Joined: Nov 1999
Posts: 1,160
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From: Clarksville, Tennessee
<font face="Verdana, Arial" size="2">Originally posted by Mark Kovalsky:
No, I can't. I start the engine and wait until I get a little bit of air pumping out. Then I shut the engine off and pour in as much as I just pumped out. Repeat until the fluid coming out is as red as the new fluid.
It's also a good idea to move the shifter to every position (PRND21) at least once while the engine is running to get all the fluid there, too.
Mark</font>
No, I can't. I start the engine and wait until I get a little bit of air pumping out. Then I shut the engine off and pour in as much as I just pumped out. Repeat until the fluid coming out is as red as the new fluid.
It's also a good idea to move the shifter to every position (PRND21) at least once while the engine is running to get all the fluid there, too.
Mark</font>
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