reverse question
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reverse question
All... i have an 01 f250 7.3 diesel. At times, when i put it in reverse, it acts like i put my foot on the brake at idle, and let the clutch put, and it stalls. The only problem is it's an auto trans!! Also, when it doesn't stall, it still acts like a stick when your letting out the clutch and slowly giving it gas. It slowly slips into gear just like a stick shift. has anyone every experienced this?? Any ideas?? Thanks, jeff
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From: Charlotte-Fairbanks-Bflo
Have not experienced that particular problem, but I do know that reverse is the only manually controlled gear in our POS transmissions. All of the forward gears are controlled by the PCM.
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From: AZ
Isn't the torque converter suppose to unlock when in reverse? I thought it was and that is why the tranny heats up so quickly when in reverse. I'm guessing here, but perhaps the torque converter is staying locked up when it stalls (like when someone who has put a manual TC switch in and forgets to unlock the TC as they slow down for a stop). When was the last time you flushed the tranny? Mark Kovalsky will know...calling Mark!
ON EDIT: READ THIS THREAD.
ON EDIT: READ THIS THREAD.
Thread Starter
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Freshman User
Joined: Dec 2007
Posts: 44
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Isn't the torque converter suppose to unlock when in reverse? I thought it was and that is why the tranny heats up so quickly when in reverse. I'm guessing here, but perhaps the torque converter is staying locked up when it stalls (like when someone who has put a manual TC switch in and forgets to unlock the TC as they slow down for a stop). When was the last time you flushed the tranny? Mark Kovalsky will know...calling Mark!
ON EDIT: READ THIS THREAD.
ON EDIT: READ THIS THREAD.
Thread Starter
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Freshman User
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What is POS and PCM ??
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From: Charlotte-Fairbanks-Bflo
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Frmr Ford Trans Engr
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From: SE Florida
Reverse is not the only gear that is manually controlled. The torque converter is supposed to be unlocked in reverse, but it's also supposed to be unlocked in first gear.
The problem is that the torque converter clutch is on in reverse when it shouldn't be. There are several reasons it might do that.
Low trans fluid.
Loose internal filter.
Internal leakage.
Bad torque converter clutch solenoid (on the valve body.)
Stuck torque converter clutch valve (in the valve body.)
Bad PCM.
Bad torque converter.
I'd start with the fluid level.
The problem is that the torque converter clutch is on in reverse when it shouldn't be. There are several reasons it might do that.
Low trans fluid.
Loose internal filter.
Internal leakage.
Bad torque converter clutch solenoid (on the valve body.)
Stuck torque converter clutch valve (in the valve body.)
Bad PCM.
Bad torque converter.
I'd start with the fluid level.
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Joined: Jun 2005
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From: AZ
What did I say...thanks Mark for your knowledge!
Reverse is not the only gear that is manually controlled. The torque converter is supposed to be unlocked in reverse, but it's also supposed to be unlocked in first gear.
The problem is that the torque converter clutch is on in reverse when it shouldn't be. There are several reasons it might do that.
Low trans fluid.
Loose internal filter.
Internal leakage.
Bad torque converter clutch solenoid (on the valve body.)
Stuck torque converter clutch valve (in the valve body.)
Bad PCM.
Bad torque converter.
I'd start with the fluid level.
The problem is that the torque converter clutch is on in reverse when it shouldn't be. There are several reasons it might do that.
Low trans fluid.
Loose internal filter.
Internal leakage.
Bad torque converter clutch solenoid (on the valve body.)
Stuck torque converter clutch valve (in the valve body.)
Bad PCM.
Bad torque converter.
I'd start with the fluid level.