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Old 03-18-2010, 02:41 PM
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Ford E40D trans

A friend of mine bought a 1994 F150 and pulls a trailer. The trans burnt up and was repaired and burnt up again and repaired again. The trans man said it was the throttle position sensor so he changed it. He says this was a bad trans from Ford and will not hold up pulling a trailer. Is he correct or is there some trick to make them live,such as a large extra cooler?
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Old 03-18-2010, 04:09 PM
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I think its a very good transmission. Good to make the shop money anyways . No but really, I find it hard to believe a TPS burnt up the trans. As a TPS always has symptoms when its skewed or glitching. Unlike a mass air flow sensor or something that measures load, for the computer.

I pull 18.5K lbs GVCW with mine all the time. And build many that tow more than that or any F150 could even think about pulling.

Blaming OEM for the trans shortcomings is an excuse of not knowing enough fundamentals of the trans, I think, or someone is trying to do a cheap repair. As there is many many after-market and OE parts to repair these trans to make severe duty no problem.
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Old 03-18-2010, 05:22 PM
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The trans was repaired by a reputable shop not someone in their back yard,but I was told he hates Fords. He said the TPS wears in one place and gives the wrong signal and the trans does not get enough pressure.Is this possible or just a line? My friend pulls a 6X10 enclosed trailer with a lawn mower and grass cutting equipment.If the trans was properly repaired is there anything we can do to help it live? He is not a hard or fast driver and never uses OD when towing.
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Old 03-18-2010, 06:43 PM
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it is a good trans.. there are areas to address during rebuild on the valve bodys and accumilator body section.

A larger line modulator boost valve in the accumilator v-body is good idea. .500 on a gas application... A .427 on a diesel application is good.

Replacement main boost valve too.

There are several updates to internal hard parts too.

The manual lever position sensor was a major problem area of the early E4OD equipped vehicles
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Old 03-18-2010, 06:53 PM
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1994 f150

I had a 1994 f150 ext.cab step side. It had the e40d with a 351 engine. It had 50k when I bought it. I used it maybe once every month to pull a 2200 pound boat with NO other towing and drove it very easy. By 80k miles (about a year after I purchased it), it started to go bad. I can't remember the exact diagnosis, 'cause I didn't have it repaired....I got rid of the truck. I do remember it had to do with a problem with pressures and my tranny guy (a long term family business in tampa), said he'd seen many of those transmissions with the same problem. He said they could rebuilt and the problem minimized. He even guessed within a few thousand miles my truck's mileage as soon as I started telling him about the tranny problems. I will add that this guy was a ford guy and did all my tranny work on my vehicles, a saleen mustang and a dodge dakota. Never had any bring backs from me. Just my experience....
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Old 03-18-2010, 08:09 PM
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Thanks to all. It has a 6 cyl. gas engine.I guess this tranny man doesn't know about the updates.I have never worked on a Ford tranny,or electronic one. Can these fixes be done without pulling the tranny?
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Old 03-20-2010, 07:48 AM
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2 things that really help an e4od are use synthetic fluid, install 3/8 cooler lines in place of the stock 5/16 ones to improve fluid flow and tranny lubrication.These tricks done on e450 transit busses extended the normal lifespan of 70,000 miles to over 200,000 miles.After changing to synthetic fluid we also switched from 20,000 mile fluid and filter changes to 100,000mile fluid and filter changes and the problems were gone.
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Old 03-20-2010, 02:00 PM
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Quote:
Originally Posted by speedydeedy
Thanks to all. It has a 6 cyl. gas engine.I guess this tranny man doesn't know about the updates.I have never worked on a Ford tranny,or electronic one. Can these fixes be done without pulling the tranny?

This doesn't seem to mesh for me. A 6 cyl with an E4OD? Are we sure it isn't an AODE/4R70W? They were known to be weak.... a lot weaker than the E4OD, which was used behind the 7.3 diesel right up until the Torqshift/6.0L came out (although it was called the 4R100 in the newer incarnations).
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Old 03-20-2010, 02:26 PM
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Quote:
Originally Posted by sbchevfreak
This doesn't seem to mesh for me. A 6 cyl with an E4OD? Are we sure it isn't an AODE/4R70W? They were known to be weak.... a lot weaker than the E4OD, which was used behind the 7.3 diesel right up until the Torqshift/6.0L came out (although it was called the 4R100 in the newer incarnations).

the E40D was installed behind the 300 cid inline 6 in the early daze of the E40D
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Old 03-20-2010, 05:09 PM
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I had a '92 351W F250 with that tranny. It never failed, but it was not one that made me warm and fuzzy. Occasionally it would shift so hard the truck would shake. I used it with a truck camper and a 22' travel trailer with no problems, but........ I ended up trading the truck for other reasons, but it had close to 100K at that time. It is a good transmission - just not in the stock form.

Dave W
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Old 03-20-2010, 06:15 PM
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I have found out that the biggest problem is the rebuilder. My buddy picked his truck up after he rebuilt it for the second time and was not towing anything,It went about 22 miles from the tranny shop and quit pulling.The tranny man is going to rebuild another tranny this time but the same type.I can't wait to see how far this one goes before breaking.
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