Changing ATF - best way to get it all out

[NVR FNSH]

Since this isn't exactly diesel related I figured I put it in here.



I need to do the 60K service on my wife's '98 Explorer (2wd, 5. 0 V8, 4spd auto) and part of it is to change the ATF. All my experience is on manual transmissions so I'm wondering what the best way to drain the torque converter might be. I know I'm going to make a big mess when I drop the pan.....



The ATF looks good and doesn't smell burnt but I'll change it. Figured I put in Redline Synthetic ATF.



Brian

 

[Tim1]

changing fluid

Brian, heres the way that i did it on our 94 blazer. Bought a new filter and a drain plug assembly from B&M transmissions at the local auto store speed shop. Drained as much as would come out when removed the pan, will make a mess. Measured it. Drilled pan and installed drain plug kit. Changed filter. Installed pan. Look closely to see clearance when installing plug, so doesn't interfere with pan install. Filled back up with measured amount of new oil. Run for 30-45 seconds to empty converter into the pan as the new oil fills converter. Then drain pan out of new plug and refill measured amount with new oil. Run and adjust accordingly. May need a tad more. Worked great for me. Tim

 

[parcher]

Generally loosening the valve body bolts will allow a lot more fluid to drain than would otherwise. Just re-torque the bolts with an inch pound torque wrench when dode (see servicw manual or call a trans shop for spec).

 

[illflem]

Before you drop the pan remove one of the lines to the cooler, aim it at your drain pan and start your engine in N till the flow stops.

 

[NVR FNSH]

Originally posted by illflem

Before you drop the pan remove one of the lines to the cooler, aim it at your drain pan and start your engine in N till the flow stops.

This won't hurt the trans - to run it out of fluid? Which line - feed or return? Or does it matter?



Again, I'm a complete newbie on auto's... ... .



Brian

 

[illflem]

It won't hurt as long as you don't run it dry long. Have someone to turn off the engine when you signal it's time. No difference which line you use, just use the one that is easiest to direct in the drain pan.

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Make sure you have the right end of the hose and the flow doesn't come out the end that isn't in the drain pan!!!

 

[Sled Puller]

Change the filter and top off.



Then take off the return line, have someone start it up at idle, and as it is pumping out, you are dumping new in.

I think about 4 qts in our trucks. Adjust accordingly.



Or, take it to a shop where they can completly flush it with a machine.