4R100 life span?
Post Fiend
Joined: Oct 2005
Posts: 10,626
Likes: 7
From: Plano TX and Brentwood TN
~96,000 on my 02. After that happened I just got rid of it and went with the 6.0. Servos were shot and you wouldn't believe the close calls that I had at intersections when it wouldn't shift properly.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
wow thats it? is my trany on borrowed time?
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More Turbo
Joined: Nov 2004
Posts: 713
Likes: 5
From: Minneapolis, MN
I had one let go at 60k while plowing, have seen them go at 40k when they're employee driven plow trucks. I would think with mostly highway miles they'd last a long time as long as they're not getting too warm. Seems that heat is the number one tranny killer.
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
mine has never gotten hot
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Modular motor junkie
Joined: May 2009
Posts: 6,190
Likes: 8
From: Texas
what diode ?
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
The Diode is a part that they changed for the '01 year. It is not in the gas engine trucks, just the diesel trucks.
What engine do you have?
EDIT: Never mind, you have a gaser.
What engine do you have?
EDIT: Never mind, you have a gaser.
Elder User
Joined: Feb 2009
Posts: 572
Likes: 0
It is highly variable. My dad has a 2000 7.3 that has over 180k on it with no problems whatsoever. My grandfather had a 2000 7.3 that had the tranny go out at 130k. A friend of my dad's has a 2001 7.3 that had the tranny go out at only 70k. Lastly, one of my relatives has a 2001 Expedition 5.4 that had the tranny just go out at 90k. As you can see, it's nearly impossible to predict.