E4OD Leaking at the front

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Jul 29, 2009 | 08:32 PM

tuppence

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E4OD Leaking at the front

It's in a '94 E350 17' box truck and has a Remanufactured tag on it. Under a load when hot, it just pours fluid out between the tranny and the engine; when cool and babied there's no leak at all. I've tried Lucas additive; not much change. Other than the leak, it's really not bad; maybe shifts a little hard sometimes, and a little late once in a while. Is there anything I can do besides pull it out and have it re-built?

Thanks,
Steve

Jul 29, 2009 | 10:30 PM

David85

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Joined: Nov 2003

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From: Campbell River, B.C.

The OEM front main seal will let go when they overheat. Aftermarket seals can cope with this a little better. I take it the transmission was rebuilt before you bought the vehicle.

There is a long list of things that could be causing the actual overheating problem, but one that comes to mind is a defective transmission cooler that wasn't replaced after the rebuild. Do you know if there is an inline filter on one of the tranny cooler lines?

If not, it means who ever rebuilt it might have cut a few corners.

Jul 30, 2009 | 10:33 PM

therifleman556

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Joined: Sep 2008

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From: On the prairie

The tranny in mine shifted VERY hard ALL the time. Best answer I've been able to scare up is a bad tach sensor caused the tranny to go into failure protection mode and boost line pressures causing the OEM seal to let loose. Does your tach do funny stuff like read Zero when coasting or does the needle bounce around alot?

Jul 31, 2009 | 06:05 AM

tuppence

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I don't have a tach gauge in the instrument cluster; where is the tach sensor for the tranny, and how much does it cost? Did you replace yours, and if so, did it help? My overdrive light is blinking, so I guess I should take it somewhere to read the codes and tell me what they think.

Steve

Aug 2, 2009 | 10:41 PM

banks7.3

Mountain Pass

Joined: Sep 2004

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just fixed the same problem on mine. bought the parts through oregon performance transmission, they had the best prices i found. here are the parts i used.
http://www.oregonperformancetransmis...gory_Code=E4OD
http://www.oregonperformancetransmis...gory_Code=E4OD
http://www.oregonperformancetransmis...gory_Code=E4OD
after pulling and examining the torque converter found it to have been overheated also. this is the torque converter supplied by the transmission shop.
http://www.transtar1.com/technicalHT...2&ppp=35&ppn=2
after rebuilding i took off the banks transcommand.
the transmission in the truck was a ford rebuilt with 17000 miles on it when it blew the front seal. it has an aftermarket cooler along with the radiator cooler and inline filter.

Aug 3, 2009 | 07:00 PM

tuppence

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Thanks; sounds like just what I needed! So it's working well for you now? Have you re-built automatic transmissions before? I've done just about everything else, but never cracked one open yet.

Steve

Aug 6, 2009 | 09:32 AM

banks7.3

Mountain Pass

Joined: Sep 2004

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so far it's working good. big test will come next weekend when i hook up the fifth wheel. i had to wait for new switches for my us gear o.d. unit, got them on last night. it does shift a lot firmer now. i did not rebuild it, the pump did not want to come out so i took it to a transmission shop for $250 and let them put the parts in. they were familiar with these parts and had installed them in the past in other transmissions. they also gave it a full check up, new filter and sealed it up.