Transmission
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Transmission
I have a problem with the overdrive light flashing after having driven a while. Sent the vehicle (Ford F150 7.3 powerstroke Gulfstream C class motorhome) back to the service centre who says that the lock up clutch was not working and was overheating the oil. The centre (in England) also noticed a link pipe across the transmission cooler feed and return which when inspected it was found to be open although there is a device fitted in the pipe. Does anyone know anything about this pipe and the device fitted in it ? Should it be open or should the device work like some kind of valve? It seems to me that if it is open then oil will flow along this pipe and not through the cooler. I am concerned that if the lock up clutch is fixed, it could be damaged again if this pipe is still faulty.
Any help would be appreciated as information about this sort of problem is difficult to find in England.
John
Any help would be appreciated as information about this sort of problem is difficult to find in England.
John
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
Transmission
That pipe is a bypass around the cooler. It is designed to bypass the cooler when it is very cold. The fluid gets too thick to flow through the cooler.
The part fitted in the pipe is a pressure relief. When the fluid is too thick to go through the cooler this allows the fluid to bypass the cooler.
The part fitted in the pipe is a pressure relief. When the fluid is too thick to go through the cooler this allows the fluid to bypass the cooler.
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Transmission
Mark
Thanks for the information. It is so difficult to get any facts or details here in England.
If the device in the bypass pipe is a pressure releif then I would expect it to have a restriction when pouring cold oil down the pipe. This does not seem to be the case so I suspect that the device is faulty. Do you know anyway to check it ?
Thanks again for your help.
John
Thanks for the information. It is so difficult to get any facts or details here in England.
If the device in the bypass pipe is a pressure releif then I would expect it to have a restriction when pouring cold oil down the pipe. This does not seem to be the case so I suspect that the device is faulty. Do you know anyway to check it ?
Thanks again for your help.
John
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