Transmission Problems
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Senior User
Joined: Oct 2002
Posts: 437
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From: Fayetteville (Atlanta) GA
Transmission Problems
4R100 Transmission Problem
2000 F-250 V-10 4x4 with 82,675 miles on it. On the interstate yesterday traveling around 55 MPH unload I went to pass a semi. Pressed accelerator truck downshifted out of OD and accelerated normally. Pressed accelerator further, truck downshifted again, transmission seemed to be slipping (nothing engaged) lost all forward acceleration and truck began coasting. RPM quickly jumped up to 4,000 and engine began to miss. (Believe I hit the rev. limiter.) Backed off accelerator and everything worked normal again. Tried it again and the same thing happened. Towed a 4,000 pound car on a 2,000 pound trailer Sunday and everything worked great.
Fluid and filter changed at 40,000, with no signs of metal or sludge in the pan. I run a aux. Hayden 679 cooler after the factory air to oil cooler. I also have a trans temp gauge that has never seen temps above 185 degrees.
Any ideas ? This don’t sound good.
Mark
2000 F-250 V-10 4x4 with 82,675 miles on it. On the interstate yesterday traveling around 55 MPH unload I went to pass a semi. Pressed accelerator truck downshifted out of OD and accelerated normally. Pressed accelerator further, truck downshifted again, transmission seemed to be slipping (nothing engaged) lost all forward acceleration and truck began coasting. RPM quickly jumped up to 4,000 and engine began to miss. (Believe I hit the rev. limiter.) Backed off accelerator and everything worked normal again. Tried it again and the same thing happened. Towed a 4,000 pound car on a 2,000 pound trailer Sunday and everything worked great.
Fluid and filter changed at 40,000, with no signs of metal or sludge in the pan. I run a aux. Hayden 679 cooler after the factory air to oil cooler. I also have a trans temp gauge that has never seen temps above 185 degrees.
Any ideas ? This don’t sound good.
Mark
Senior User
Joined: Apr 2003
Posts: 221
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From: Greater Cleveland Ohio
Transmission Problems
I don't know the set-up for a newer Ford with OD, but the GM TH700R4 often develops problems with the Torque Converter Lockup Switch/Solenoid that creates some very erratic shifting behaviors. Maybe Ford has something similar in the trans that could be devloping a fault. In the GM, this device is governed by the onboard computer.
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Joined: Jun 2001
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From: Conyers
Transmission Problems
no...that's a common myth. I'd definatly have to say that a sensor went bad. Unless it kept downshifting when you were towing, I doubt that towing in OD kilt your tranny. Take it in to have the codes read as it definatly has set some codes.
Thread Starter
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Senior User
Joined: Oct 2002
Posts: 437
Likes: 3
From: Fayetteville (Atlanta) GA
Transmission Problems
Update: Drained the fluid last night and dropped the pan. Fluid was nice and clean, no odor, did not show any signs of overheating. The pan was also clean, no metal, sludge, etc. I did notice the bellhousing slightly damp. Removed the drain plug on the bell housing and found evidence of a small fluid leak. Also, the truck had been sitting for a hour. I could touch the exhaust pipes with no problem, but the torque converter was very hot to the touch. So does this mean the torque converter is the problem?
On the way to work today did the same thing. I can make it slip by downshifting.
Any transmission technicians out there ?
Mark
On the way to work today did the same thing. I can make it slip by downshifting.
Any transmission technicians out there ?
Mark
