Changing the transmission fluid
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New User
Joined: Aug 2002
Posts: 5
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From: Fulltimer USA
Changing the transmission fluid
I have just over a 100K on the truck and want to change the transmission fluid, the only Ford dealer here says it’s better to just flush it and not change the filters. Does this sound right?
2004 F350 CC Lariat DRW 6.0 PSD/TroqShift FX4
Staffords on the Road
2004 F350 CC Lariat DRW 6.0 PSD/TroqShift FX4
Staffords on the Road
Elder User
Joined: Jun 2009
Posts: 560
Likes: 3
From: 92592
Nope.
You have two filters, an internal filter that does not need changed on a regular basis (it's basically a screen for major fails) and a external bypass filter in the right front wheel well that needs changed every 20,000 miles or so.
Many people (myself included) feel that, because of the solvent nature of ATF, a transmission that has not been regularly maintained is better served by changed the contents of the pan every 3-5000 miles for 4 rotations to gradually introduce the new fluid and keep from breaking loose large amounts of deposited solids.
If it were my truck, I would change the external filter (22mm socket and a impact to take it off and NOT to put it on) and the pan contents (about 7 1/2 qts) then change the pan contents again in 3000 miles until I'd done that four times and change the filter again.
I like Lucas Oil Multi-Vehicle ATF : Lucas Oil - Lucas Oil Multi-Vehicle ATF and, yes it is approved for LV and SP replacement.
You have two filters, an internal filter that does not need changed on a regular basis (it's basically a screen for major fails) and a external bypass filter in the right front wheel well that needs changed every 20,000 miles or so.
Many people (myself included) feel that, because of the solvent nature of ATF, a transmission that has not been regularly maintained is better served by changed the contents of the pan every 3-5000 miles for 4 rotations to gradually introduce the new fluid and keep from breaking loose large amounts of deposited solids.
If it were my truck, I would change the external filter (22mm socket and a impact to take it off and NOT to put it on) and the pan contents (about 7 1/2 qts) then change the pan contents again in 3000 miles until I'd done that four times and change the filter again.
I like Lucas Oil Multi-Vehicle ATF : Lucas Oil - Lucas Oil Multi-Vehicle ATF and, yes it is approved for LV and SP replacement.
Posting Guru
Joined: Dec 2009
Posts: 1,674
Likes: 2
No, at 100K I would flush and change the filters. Changing the oil but not the filter (i.e. recirculating the clean oil through a dirty filter) is sort of like wiping your baby's butt and slapping on the old diaper.
