E4OD Slipping...
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Senior User
Joined: Apr 2011
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From: Fairbanks
E4OD Slipping...
Both my 96 F20 and 94 Bronco have E4ODs and they are both having a slight slipping problem at speed. When I am in overdrive at 45-60 mph (varies) it'll feel like the tranny slipped into nuetral for a moment, then grabs back into gear again. The bronco transmission was rebuilt about 2 years ago, and the F250s is unknown (Truck has 200K mi). The fluid level is good and color is nice and pink in both vehicles. I use Mercon type fluid, but I wonder if I should use something else like a mercon V or a synthetic Mobil1 type. What do you tranny experts think?
The Southernmost Mod
Joined: Dec 2004
Posts: 6,902
Likes: 20
From: Caracas, Venezuela
ATF won't correct this problem, you don't seem to have low ATF neither. It probably is caused by a problem with the valve body, maybe even a broken spring, an ailing torque converter could also cause this, but it would happen at any speed. I remember somebody mentioned a probable cause but can't recall exactly which. Check the E4OD shift kit install mod in my signature, you might get a better idea about it.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
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From: Easton,Ks
Most of the time this is caused by a bad TR sensor.
Auto parts stores will call the TR sensor a PRNDL Neutral Safety Switch sometimes.
Other times they will call the TR sensor a mpls transmission sensor.
It can also happen in a 4X4 truck with a non 4X4 filter in the E4OD.
Auto parts stores will call the TR sensor a PRNDL Neutral Safety Switch sometimes.
Other times they will call the TR sensor a mpls transmission sensor.
It can also happen in a 4X4 truck with a non 4X4 filter in the E4OD.
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Senior User
Joined: Apr 2011
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From: Fairbanks
How do you get transmission codes? I have a code reader and can retrieve engine codes with koeo and koer method. If that is the same process, then I have no transmission codes.
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