Transmission fluid change - 3X drain and fill, in-line filter (mileage, buying)

[JBPisgah]

I'm changing the transmission fluid. Warnings about a flush are all over the place, so I'm going for a 3x drain and fill.

Then I got to thinking...

• Do all three drain and fills in a day, with ten miles between each, or do one each weekend?

• Drop the pan and change the filter at the first drain and fill, or wait until the last one?

• Install an in-line transmission filter in the return line, or the OEM screen filter is really all you need?

Does any of this stuff matter? Experience with the in-line filters?

Current fluid is still red. Shifts are good while driving. 1998 Nissan Altima, 173,000. Thanks, everybody.

[frankgn87]

Id change the filter first and the fluid once. If you have a few hours, id do the 3 changes a day but be warned, the fluid will be pretty hot by the third change. no need for an in line filter.

Originally Posted by JBPisgah

I'm changing the transmission fluid. Warnings about a flush are all over the place, so I'm going for a 3x drain and fill.

Then I got to thinking...

• Do all three drain and fills in a day, with ten miles between each, or do one each weekend?

• Drop the pan and change the filter at the first drain and fill, or wait until the last one?

• Install an in-line transmission filter in the return line, or the OEM screen filter is really all you need?

Does any of this stuff matter? Experience with the in-line filters?

Current fluid is still red. Shifts are good while driving. 1998 Nissan Altima, 173,000. Thanks, everybody.

[wrench409]

Originally Posted by JBPisgah

I'm changing the transmission fluid. Warnings about a flush are all over the place, so I'm going for a 3x drain and fill.

Then I got to thinking...

• Do all three drain and fills in a day, with ten miles between each, or do one each weekend?

• Drop the pan and change the filter at the first drain and fill, or wait until the last one?

• Install an in-line transmission filter in the return line, or the OEM screen filter is really all you need?

Does any of this stuff matter? Experience with the in-line filters?

Current fluid is still red. Shifts are good while driving. 1998 Nissan Altima, 173,000. Thanks, everybody.

Whatever for?

It's been said that a high mileage ATF flush/fluid change can possibly generate transmission issues.

Doing a fluid/filter change on regular intervals is considered better for the transmission.

[ferretkona]

Originally Posted by JBPisgah

I'm changing the transmission fluid. Warnings about a flush are all over the place, so I'm going for a 3x drain and fill.

Yeah, make sure you tell any one buying your car in the future you cheaped out on the flush. 80% of the fluid is in the torque converter. With regular on schedule maintenance a engine and transmission will go 300,000 miles these days. Shade tree cars much much less so.