Transmission problem again
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Joined: Nov 2014
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Transmission problem again
I changed my tyranny fluid no more than 7500 miles ago. I didn't do the torque converter. That fixed my slipping issue. Now it's slipping from 1-2 gear. The rest seem to be fine. I thought my problem was my FIPL being out of range but it is at 1.175. Is it possible the fluid could be bad again this soon?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,731
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From: SE Florida
Yes it could, for two reasons.
First, if you didn't flush or drain the torque converter you changed less than half of the fluid. Second, if a clutch is slipping it can destroy the clutch and fluid in less than 10 miles.
Changing ATF Fluid in a E4OD and 4R100 transmission - Ford-Trucks.com
First, if you didn't flush or drain the torque converter you changed less than half of the fluid. Second, if a clutch is slipping it can destroy the clutch and fluid in less than 10 miles.
Changing ATF Fluid in a E4OD and 4R100 transmission - Ford-Trucks.com
Thread Starter
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More Turbo
Joined: Nov 2014
Posts: 618
Likes: 7
Yes it could, for two reasons.
First, if you didn't flush or drain the torque converter you changed less than half of the fluid. Second, if a clutch is slipping it can destroy the clutch and fluid in less than 10 miles.
Changing ATF Fluid in a E4OD and 4R100 transmission - Ford-Trucks.com
First, if you didn't flush or drain the torque converter you changed less than half of the fluid. Second, if a clutch is slipping it can destroy the clutch and fluid in less than 10 miles.
Changing ATF Fluid in a E4OD and 4R100 transmission - Ford-Trucks.com
Senior User
Joined: Dec 2003
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I find it hard to believe that any transmission fluid is going to make a trans slip IF it is otherwise in good shape. The wrong type or amount of friction-modifiers in the oil can make it shift hard, or soft - and cause premature wear. I can't imagine how it can make a good set of clutches wit proper PSI slip. If you put some odd-ball oil in there that made the clutch surfaces so slippery they could not take hold - it's likely those additives would get embedded in the facings and stay there a long time. I put GL5 oil in the wet-brake transmission in my bulldozer once that calls for GL1 oil only. After that it slipped and changing back to the correct oil did not fix it. I can't see how the FIPL switch is going to make it slip either. Shift terrible and throw it into limp-mode, yes.
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I find it hard to believe that any transmission fluid is going to make a trans slip IF it is otherwise in good shape. The wrong type or amount of friction-modifiers in the oil can make it shift hard, or soft - and cause premature wear. I can't imagine how it can make a good set of clutches wit proper PSI slip. If you put some odd-ball oil in there that made the clutch surfaces so slippery they could not take hold - it's likely those additives would get embedded in the facings and stay there a long time. I put GL5 oil in the wet-brake transmission in my bulldozer once that calls for GL1 oil only. After that it slipped and changing back to the correct oil did not fix it. I can't see how the FIPL switch is going to make it slip either. Shift terrible and throw it into limp-mode, yes.
Lead Driver
Joined: Apr 2008
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I dont see how fluid can do it either. But it can. Have a 94 Mazda 626, if anyone knows anything about em, the trans in em is about as welcome as the E40D. Was having all sorts of weird problems with it... long story short had it flushed, shifts like new.
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I was able to fix my problem. After driving it more I realized it was indeed slipping but it was more because the shift points were off. I set my idle to 650-700 while in DRIVE with AC OFF and set TPS to 1.2 EXACTLY. Drove it for a while. It didn't fix right away but after about an hour (not continuous driving) it was fixed. I am hoping that that was my problem. BTW the TPS was set nowhere near 1.2.
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