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Old

Dec 16, 2025 | 03:56 PM

#1

Walls landscape

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2nd Gear

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Transmission

Will a tranny in a 2003 f550 fit a 2005 f550

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Old

Dec 16, 2025 | 08:59 PM

#2

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,732

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From: SE Florida

Maybe. What transmission is in the 2003? That year could have a 4R100 or a 5R110W. The 2005 has a 5R110W.

And the engine in each makes a difference, too. And they both need to be the same as to 4x2 or 4x4.

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Old

Dec 16, 2025 | 09:16 PM

#3

Walls landscape

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2nd Gear

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Tranny

they both are 6.0 auto 4x4. The 03 was told it was a 5r110 and my truck has 5r110w from what I’m gathering. Was the 03 made with 5r1110? What is the difference?

Quote:

Originally Posted by Mark Kovalsky

Maybe. What transmission is in the 2003? That year could have a 4R100 or a 5R110W. The 2005 has a 5R110W.

And the engine in each makes a difference, too. And they both need to be the same as to 4x2 or 4x4.

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Old

Dec 19, 2025 | 08:42 PM

#4

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,732

Likes: 2,661

From: SE Florida

All 6.0L automatic trucks have the 5R110W. You can swap them,

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