Transmission w/no engine braking
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New User
Joined: May 2003
Posts: 21
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Transmission w/no engine braking
I have a puzzling problem. Here the stats:
2000 Expedition EB
5.4L
4R100 tranny
trailer pkg
This week I noticed I was driving up on things faster then I wanted and using more brake than normal. Took the truck on the road, ~60mph and pushed the button to disengage overdrive. The transmission shifts to third and the engine goes straight to idle, no engine braking whatsoever. Same as if you had put it in neutral. Same thing happens when you shift to second. This I know is not normal.
I took the truck to the dealer on two consecutive days. I drove and demonstrated for the tech. He acted like he had no idea that you should get engine braking on a shift down to third or second. They hooked up the computer and on the second day hooked up the diagnostic computer and drove the truck. They found absolutely no codes, nothing out of spec. Even claimed they were on the line to Ford tech. I have a good (and too frequent unfortunately) relationship with the service writer. He has been straight with me in the past. Dealership apparently has not seen this problem before.
Has anyone else out there had this problem and know what the cure is. I would rather catch it now, before it possibly cascades into something worse. Thanks.
-Freewheeling
2000 Expedition EB
5.4L
4R100 tranny
trailer pkg
This week I noticed I was driving up on things faster then I wanted and using more brake than normal. Took the truck on the road, ~60mph and pushed the button to disengage overdrive. The transmission shifts to third and the engine goes straight to idle, no engine braking whatsoever. Same as if you had put it in neutral. Same thing happens when you shift to second. This I know is not normal.
I took the truck to the dealer on two consecutive days. I drove and demonstrated for the tech. He acted like he had no idea that you should get engine braking on a shift down to third or second. They hooked up the computer and on the second day hooked up the diagnostic computer and drove the truck. They found absolutely no codes, nothing out of spec. Even claimed they were on the line to Ford tech. I have a good (and too frequent unfortunately) relationship with the service writer. He has been straight with me in the past. Dealership apparently has not seen this problem before.
Has anyone else out there had this problem and know what the cure is. I would rather catch it now, before it possibly cascades into something worse. Thanks.
-Freewheeling
Junior User
Joined: Jun 2004
Posts: 50
Likes: 0
Did you have any success solving your problem? I am having the exact same problem with my 2001 Excursion, V10, 4X4. I am taking it to a tranny shop next week, but I would like to know what to expect before they look at it. Thanks
Posting Guru
Joined: Jul 2003
Posts: 2,210
Likes: 2
What you can expect is that something is wrong with the coast clutch. It isn't engaging to provide engine braking. There was a problem about 2000-2001 where the snap ring groove wasn't machined deep enough and the snap ring would come out, disabling the coast clutch.
It takes a teardown to fix it.
It takes a teardown to fix it.
Junior User
Joined: Jun 2004
Posts: 50
Likes: 0
Thanks. I searched more threads after leaving my first post, and I agree it must be a coast clutch issue. My problem started out intermittent, and only recently does it not work all the time. Hopefully the problem is solenoid and/or sensor based, not the snap ring issue you mentioned. That would probably be an "all or nothing" type of failure. Time will tell....
