E40D tranny going into "neutral" while driving
Senior User
Joined: Feb 2015
Posts: 144
Likes: 5
I have a trans temp gauge doesn't get hot fluid is still perfect. It's not a slipping feeling it's literally in neutral won't go no where if you floor high rpm the truck will force it self to shift very hard and o/d light flashing. I guess I just need to bring it to an automotive electrically specialist
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,739
Likes: 2,669
From: SE Florida
The flashing OD light means the computer has detected something is wrong with the transmission system. Slipping is only one of about 50 different things that could make the OD light flash. The only way to know why the light is flashing is to get the codes read.
Hotshot
Joined: Dec 2005
Posts: 14,377
Likes: 609
From: evansville in
In the late 90s and 2000s we replaced a LOT of MLp at the dealership. There massive water intrusion issues dating to the beginning of e4od use. Most people don't understand how crucial it is. Listen when you go from park to rev and to n again . The engine should change rpm slightly due to the load anticipated. Most I see don't change. The truck may work ok as mine did but not 100% correctly. Replaced mine with no codes or symptoms other than I knew it was not right.
Listen to mark on this. Lots of these would fall out of gear and MLp fixed it.
Listen to mark on this. Lots of these would fall out of gear and MLp fixed it.
2nd Gear
Joined: Oct 2022
Posts: 2
Likes: 0
i just replaced my mlps\nss\trs and the tps and still having this problem. Did you get yours figured out?
2nd Gear
Joined: Jul 2022
Posts: 2
Likes: 1
I took the cluster out and sent it off to be checked. The speedometer repair shop said the psom had a capacitor that was going bad and causing an intermittent signal which was causing it to drop into nuetral. After having it repaired for about a hundred bucks, it's been a month now and has not dropped since and the CEL light went off on its own.
2nd Gear
Joined: Oct 2022
Posts: 2
Likes: 0
Proble
Problem fixed. Replaced the vss on the tail shaft of transmission and the problem with jumping into neutral is fixed..
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4wd Low
Joined: Sep 2021
Posts: 13
Likes: 1
Thanks
Dave
4wd Low
Joined: Sep 2021
Posts: 13
Likes: 1
Dave
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