E40D overhall/servo snap ring and plate missing

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Apr 3, 2007 | 10:50 PM

blacksheep123

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Joined: Jan 2007

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E40D overhall/servo snap ring and plate missing

I've got a 95 F350 4x4 powerstroke diesel with a E40D automatic tranny. I'm rebuilding the trans and when I got to the servo the snap ring and the plate below the the snap ring were missing. I'm wondering why the trans still worked good even though they weren't there. The trans shifts fine. Could it be that they put a shift kit in it last time it was rebuilt? How can I tell if it has a shift kit? I'm concerned that if I put a snap ring and plate in it now that it might not shift right once I'm through rebuilding it. Do you discard the snap ring and plate when you put a shift kit in it, or was it just left out?

Apr 4, 2007 | 09:18 AM

Redneck1465

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Joined: Sep 2006

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You might want to post this in the forum for that year truck. They might be able to help a little more.

Apr 4, 2007 | 04:13 PM

David85

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Joined: Nov 2003

Posts: 6,900

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From: Campbell River, B.C.

The servo piston assembly was revised in august of 1995 to eliminate the piston retainer and snap ring. 96 and up transmission cases don't even have the groove machined in the servo bore for the snap ring. If you look at the at the valve body where it lines up with the servo, you will notice a strong "X" profile that is reinforced enough to push against the servo through the seperator plate and hold it in position once assembled. The only real reason for the new design was ease of assembly, and all overhaul kits should have the new design.