Noob E40D Question.
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Mountain Pass
Joined: Apr 2025
Posts: 159
Likes: 35
Noob E40D Question.
Doing a trans service, new filter, Mercon V. Not draining the converter. Truck has 189k runs great, trans is perfect, fluid is nice and clean but I did just about everything else to the truck and want to service the trans because I don't know when it was last changed.
Anything I should check while in there? I heard about the OD piston snap-ring breaking and some other stuff to check.
Thanks.
Anything I should check while in there? I heard about the OD piston snap-ring breaking and some other stuff to check.
Thanks.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,740
Likes: 2,669
From: SE Florida
I haven't heard about a problem with the OD piston snap ring. I do know about a problem with the coast clutch snap ring. To check it, all you need to do is take the transmission out of the truck and tear it down. Same for the OD snap ring.
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Mountain Pass
Joined: Apr 2025
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Butt-Head
Joined: Apr 2004
Posts: 9,464
Likes: 2,943
From: Reed Point, MT
If an automatic transmission needs a filter replacement, the transmission is junk anyway. I'm not being rude or snarky, but changing the internal filter is a waste of time and money.
I watched some video on youtube a while back where a guy changed the filter on a C6 as maintenance. That in itself isn't too groundbreaking but the fact that a C6 filter is nothing more than a window screen.......
I watched some video on youtube a while back where a guy changed the filter on a C6 as maintenance. That in itself isn't too groundbreaking but the fact that a C6 filter is nothing more than a window screen.......
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Mountain Pass
Joined: Apr 2025
Posts: 159
Likes: 35
If an automatic transmission needs a filter replacement, the transmission is junk anyway. I'm not being rude or snarky, but changing the internal filter is a waste of time and money.
I watched some video on youtube a while back where a guy changed the filter on a C6 as maintenance. That in itself isn't too groundbreaking but the fact that a C6 filter is nothing more than a window screen.......
I watched some video on youtube a while back where a guy changed the filter on a C6 as maintenance. That in itself isn't too groundbreaking but the fact that a C6 filter is nothing more than a window screen.......
Butt-Head
Joined: Apr 2004
Posts: 9,464
Likes: 2,943
From: Reed Point, MT
Dunno.....
The E4OD filter has a ton of internal surface area. Pulling the pan isn't a bad idea just to check for clutch material/metal contamination but to just change the filter.....your call, your $$$$.
The E4OD filter has a ton of internal surface area. Pulling the pan isn't a bad idea just to check for clutch material/metal contamination but to just change the filter.....your call, your $$$$.
Lead Driver
Joined: Sep 2002
Posts: 9,573
Likes: 2,038
From: North Texas
Swear Mark posted some data on here about testing the filter on the E4 at Ford and it was fine with some wild mileage near 300k...maybe higher.
The ZFs I build have just a fine metal mesh screen, pointless to swap normally. I just drain and fill as service.
70W snap ring failure is up front on the drum the OD band rides, why the spiral one is available from Superior.
This is that E4/4R one https://www.sonnax.com/parts/2083-su...iral-snap-ring
The ZFs I build have just a fine metal mesh screen, pointless to swap normally. I just drain and fill as service.
70W snap ring failure is up front on the drum the OD band rides, why the spiral one is available from Superior.
This is that E4/4R one https://www.sonnax.com/parts/2083-su...iral-snap-ring
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,740
Likes: 2,669
From: SE Florida
While I was at Ford, we had some fleets that we monitored and helped with. One ambulance E4OD was returned to us after the vehicle was totaled in a wreck. The history of the truck was complete, and the transmission had never been serviced. It had 369,000 miles on the original fluid and filter.
Upon teardown, the trans didn't look bad at all. The filter was not plugged.This trans probably would have lasted many, many more miles if the truck hadn't been wrecked.
Upon teardown, the trans didn't look bad at all. The filter was not plugged.This trans probably would have lasted many, many more miles if the truck hadn't been wrecked.
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