shifts into neutral
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Junior User
Joined: Feb 2008
Posts: 58
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From: Fairfield oh
shifts into neutral
My 87 f150 5.0 automatic transmission idles rough. I ordered a new iac, will install next week when it comes in. Besides the idle issues at a stop, When the engine is cold, it will shift into neutral. I have to give it extra gas a few times, increasing the idle and then it goes back into drive. this happens every day for the first mile I drive and then it is ok. Ive checked fluid level in transmission. Any ideas on what is happening to the transmission? Some sensor? Converter? Or can the iac cause this too?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,717
Likes: 2,643
From: SE Florida
There are no sensors on this transmission. It's all mechanical. The converter can't make it shift to neutral. The IAC can't shift it to neutral, either.
The forward clutch is releasing. This can be caused by low trans fluid, a damaged internal filter, or bad seals in the forward clutch.
The forward clutch is releasing. This can be caused by low trans fluid, a damaged internal filter, or bad seals in the forward clutch.
Postmaster
Joined: Nov 2011
Posts: 3,533
Likes: 17
From: SW Florida
There are no sensors on this transmission. It's all mechanical. The converter can't make it shift to neutral. The IAC can't shift it to neutral, either.
The forward clutch is releasing. This can be caused by low trans fluid, a damaged internal filter, or bad seals in the forward clutch.
The forward clutch is releasing. This can be caused by low trans fluid, a damaged internal filter, or bad seals in the forward clutch.
Lead Driver
Joined: Mar 2006
Posts: 6,259
Likes: 438
From: IL
Use to be the vacuum modulator could cause symptoms similar to this, but I don't know if the AOD has a vacuum modulator on it or not???
Never mind...The AOD doesn't have a Vacuum Modulator, the TV cable is in it's place.
Never mind...The AOD doesn't have a Vacuum Modulator, the TV cable is in it's place.
Lead Driver
Joined: Jan 2003
Posts: 9,893
Likes: 12
From: Ohio
My AOD started this issue back in the fall. First time I drive it(cold), it would basically go into neutral(loose clutch pressure) and I would have to blip the throttle a couple times and it would then grab and go. Only first couple miles, then would be fine the rest of the day. Now that it is 60* and warmer, it doesn't seem to do it at all.
With 170K miles, I'm sure it has its problems. I have a clutch pedal to hang in it to eleviate this issue!
With 170K miles, I'm sure it has its problems. I have a clutch pedal to hang in it to eleviate this issue!
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