Transmission doesn't like shifting
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Freshman User
Joined: Nov 2010
Posts: 47
Likes: 0
Transmission doesn't like shifting
Hey guys. Today after leaving the convenience store my transmission started acting funny. It doesn't want to shift out of first gear, I have to get the rpms over 2500 and basically leave it their for a while before it will finally shift. Once out of first it seems like it shifts fine. While in first gear I also notice some noise comming from underneath, almost like a pinging sound. Once out of first it goes away. My Excursion is a 2001 7.3 with 198k miles. 4" exhaust, and Predator Diablo tuner always set to 60hp economy. I reset the pcm back to stock to see if that would make a difference and it did not. I checked the fluid when I got home and it was normal. Please tell me my tranni isnt toast. 
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,642
From: SE Florida
Why the output speed sensor? I can't see how that could cause this problem. Why would the sensor only cause a 1-2 shift problem? If it were bad how does it fix itself after the 1-2?
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
Joe28443
Joined: Jul 2009
Posts: 1,163
Likes: 4
From: Hampstead NC
I have an 01 myself and I have been waiting to see the same thing. If mine lasts till 198k I will be excited. There are plenty of guys around here that can point you in the right direction for a new one
More Turbo
Joined: Jul 2010
Posts: 669
Likes: 7
From: Tennessee
So how many of these ticking time bombs are there out there?
Perry
Perry
Why the output speed sensor? I can't see how that could cause this problem. Why would the sensor only cause a 1-2 shift problem? If it were bad how does it fix itself after the 1-2?
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
Cargo Master
Joined: Jul 2009
Posts: 2,885
Likes: 26
From: Chino, California
Why the output speed sensor? I can't see how that could cause this problem. Why would the sensor only cause a 1-2 shift problem? If it were bad how does it fix itself after the 1-2?
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
Thread Starter
|
Freshman User
Joined: Nov 2010
Posts: 47
Likes: 0
Why the output speed sensor? I can't see how that could cause this problem. Why would the sensor only cause a 1-2 shift problem? If it were bad how does it fix itself after the 1-2?
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
The problem is a failed mechanical diode. That's a type of one way clutch inside the transmission. Unfortunately it means it is rebuild time.
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
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From: SE Florida
All the diesels from the start of 2001 production through March, 2001. I don't know the number that were built.
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