e40d question
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Senior User
Joined: Jan 2007
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e40d question
Hello peoples,
I am pretty sure that my e40d transmission is wore out. The guy I bought the bronco from said he used to tow trailors with horses. The transmission seem to linger in between gears a little longer than I am comfortable with. When it shifts, it is very smooth, there is no jerking. I'm assuming that it is riding on the clutches longer than it should be. Is this normal for the e40d? My sister had a 94 t-Bird with the v-8 and I don't know what kind of transmission she had, but it was very smooth like this. It would also start slipping as she was flying down the interstate at 80 mph. Any and all thought are appreciated.
Thanks,
-Kris
I am pretty sure that my e40d transmission is wore out. The guy I bought the bronco from said he used to tow trailors with horses. The transmission seem to linger in between gears a little longer than I am comfortable with. When it shifts, it is very smooth, there is no jerking. I'm assuming that it is riding on the clutches longer than it should be. Is this normal for the e40d? My sister had a 94 t-Bird with the v-8 and I don't know what kind of transmission she had, but it was very smooth like this. It would also start slipping as she was flying down the interstate at 80 mph. Any and all thought are appreciated.
Thanks,
-Kris
Lead Driver
Joined: Sep 2002
Posts: 9,182
Likes: 12
From: Gateway to the West
My experience says the E4OD always stays too long in any one gear. But then I've been through two of them and personally have no use for the units. Given the gear ratios though it almost needs to linger like that because it is trying to let the engine get enough torque built up to drive a 0.71:1 overdrive gearing without constantly hunting back down to third... which it still doesn't manage to accomplish with any great capacity. Sorry for the bias but I've driven a lot of vehicles with automatics and the E4OD is by far the least reliable unit I have ever encountered.
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
start with new fluid and filter. dont use any additives though as this may cause failure. you can also pull codes to see if the tranny electrical is having issues.
What size tires are on the vehicle? this is important because the psom needs recalibrated for the different tire size and if its not the tranny wont shift properly
What size tires are on the vehicle? this is important because the psom needs recalibrated for the different tire size and if its not the tranny wont shift properly
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Senior User
Joined: Jan 2007
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There is not any one gear it stays in longer. It acts the same whether hot or cold. The fluid is new as well as the filter. There are no funny smells or looks. There is 180,000 miles on the truck. I'm sure the 33" tires arent helping, how do I reset? I hope to have a shift kit put in there one day.
Lead Driver
Joined: Feb 2002
Posts: 7,966
Likes: 595
From: Greater Austin, Texas
Sonnax makes a kit to replace the springs in the modulator valves in your valve body and gives you little shims to tighten up the shifts if you want. I did this to my F250 diesel and it shifts quite firm, a lot like the 71 Lemans I had in high school with a B&M shift kit.
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New User
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I would certainly go with calibration first because this can make a world of difference in your overall shift pattern.
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Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
special K , do a search for PSOM calibration on here or over on FSB. its not hard to do just make sure you have the proper info about your tires before you get started. the instructions will tell ya what tire info you need.
Posting Guru
Joined: Apr 2005
Posts: 2,018
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From: Longview, TX
I agree. Run it at 60 mph down the Interstate and see if it takes exactly 10 minutes to travel 10 miles to check the speedometer. If not, recalibrating the speedometer really helps shift points. Look for me in this thread https://www.ford-trucks.com/forums/3...p-8-5-off.html
Finally getting a really good running engine with the sensors reporting accurately to the computer made my tranny very happy.
Everytime I got the engine running better the shift points got better. Even though no codes but 111 in KOEO and CM replacing sensors made a big difference in engine and transmission performance. The biggest improvements came from replacing oxygen sensor and draining transmission and TC and replacing the filter. Others sensors replaced were ACT, ECT, (checked ohms in the oven) TPS, and idle selenoid (can't remember the acronym). The timing chain set helped some at 172K as well as the coil, wires, rotor, cap, and copper plugs.
Finally getting a really good running engine with the sensors reporting accurately to the computer made my tranny very happy.
Everytime I got the engine running better the shift points got better. Even though no codes but 111 in KOEO and CM replacing sensors made a big difference in engine and transmission performance. The biggest improvements came from replacing oxygen sensor and draining transmission and TC and replacing the filter. Others sensors replaced were ACT, ECT, (checked ohms in the oven) TPS, and idle selenoid (can't remember the acronym). The timing chain set helped some at 172K as well as the coil, wires, rotor, cap, and copper plugs.
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