Slipping overdrive or actually nonfunctioning overdrive function on 54 110 W
 

My 2005 Ford Econoline E350 van with 5.4 L gas motor with the 4R100 transmission is slipping in overdrive! Trans was previously rebuilt at 90,000 miles and now at 149,000 miles it's coming up with the same problem again!
Prior to my 2005 I owned a 2003 350 van with the same driveline with the exception for the 355 gearing can rack up over 300,000 miles with no major problems! My 05 E3 50 is equipped with the 373 rear gears and I'm curious to know if there's any alternative transmissions or ways that I can modify existing transmission so I don't have to go through this process again?

One, can I Bolt in an Allison five speed transmission?

Two, will a 5R110w Trans supplant the 4R100 and is it compatible
With my 5.4 and computer?

Three, can I modify my existing 4R100 for more durability?


Thanks

Gregory

05 Ford E-350 Van
63-1/2 R-Code 427 Galaxie 4spd Blk/red
92 SHO 5- spd Blk/Blk
1986 Mercedes-Benz 420 SEL Blue/tan
1996 Nissan 300ZX 2+2 5 speed. Silver/ Black

With an adapter, probably.

It will bolt to the engine, but you'll need to modify the trans crossmember and driveshaft because it's longer. Those are trivial compared to getting a wiring harness and building a computer to make it run. This will cost much more than your van is worth.

There are plenty of companies that build a much stronger 4R100. Brian's Truck Shop, John Wood, Racer X, just to name a few.

Something just clicked in my mind.

You say you have a 2005 with a 4R100. That combination was never built by Ford. 2004 was the last year of the 4R100. Either you have a 2004 or older with a 4R100 or you have a 2005 with a 5R110 TorqShift.

Thanks Mark my van only shifts three times meaning it
has four gears. If it shifted 4 times that would mean it's a five speed !
Maybe I have an early 2005 with leftover 4r100?

It isn't possible to have a "left over 4R100."

When the 2005 model year started the plant had all the parts to install 5R110 transmissions. If they managed to throw a 4R100 in there when they were putting the truck together the driveshaft would be too short to reach the trans, the trans would be too short to reach the crossmember, and the wiring harness wouldn't plug into the trans. How would it drive off the end of the line? And that doesn't even consider that building a 2005 with a 4R100 transmission wasn't federally certified for sale, so that's a MAJOR fine for Ford Motor Company if it were sold.

Look on the blue data tag in the driver's door opening. Under TR there is a code letter. What is it? Also, what is the 10th digit of the VIN?

4 th gear disappears much like neutral
 

Hey Mark

# 5 is the 10th digit in the vin!
The letter "F" is under the TR on the door tag!

Your help is greatly appreciated!

My mind tells me its the 4th gear shifter solenoid!

Gregory

That indicates you have a 2005 with a 5R110 transmission.

The next step is to get the codes read. The auto parts stores that read codes free can't read Ford transmission codes. You need a good independent shop or a Ford dealer.