Hi
i have a 2007 e-150 ford van with only 38,000 miles on it, with i believe a 4r70w transmission. The problem started yesterday. Goin in reverse, it would go, but as soon as you take the foot of the gas, it would stop immediatly, plus very difficult until it would start rolling, I think this is called engine breaking. Also, in Park, reving the engine, the trans makes a very strang noise, and wants to creep up (move forward) with more gas you give it. neutral does the same thing. When i drive the van, it seems like it switches gears fine, and does not make any noise, but the OD light does not show when you press the button. I did check the fluid, nice and red/pink color no smell at all. No leaks under the car, and the trans is totally dry all around. I do not show a check engine light on
This morning my friend came over with his scanner and hooked it up to my van's plug. It showed no codes of anything wrong
Has anyone have any idea what might be wrong with the trans?
Has anyone ever experienced anything like this?
My friend seems to think it might be a selenoid problem, I sort of think it might be a shifting problem, but i am no machanic.
Any suggestions sure would be appreciated
thanks
Mark

 

This kind of issue is usually due to the forward clutch being applied when it is suppose to be off. In reverse and park and neutral the forward clutch has to be released, if its not you will end up with a bind up in reverse and the trans will want to pull forward in park and neutral.
The most common cause for this condition is the forward clutches have burned and are starting to weld themselves together. These transmissions are known for forward drum cracks and drum to pump stator wear.
The shift solenoids do not control forward and reverse engagements, they simply allow the transmission to shift in the forward ranges, the epc solenoid controls line pressure and the tcc solenoid controls the converter.
Your transmission will most likely have to be removed and dismantled to find the issue with the forward clutch.

 

thnk you very much
it sounds like a big expense

 

Asumming it's a siezed forward clutch, any way of unseizing it by external means, such as pulling the pan and valve body
Is this a common problem, for transmission with only 38,000 miles. What cause the clutches to seize?

 

There is no way to fix this without removing the trans and tearing it down. You can't unstick it, you have to replace it.

What often kills the forward clutch is trying to rock a vehicle that is stuck, like in snow or mud. Younger people, like when my son was a teenager, like to do neutral drops - rev the engine really high in neutral and drop in in drive to spin the tires. That's fun until the trans has to come out.

 

DO you agree with the diagnosis of the trans, or, do you feel there are other possibilities os fomething going wrong with the the trans

 

I can't think of anything that could cause this other than a failed forward clutch that is welding itself together.

 

It could also be the intermediate one way snap ring came off and the one way came apart. Either way the trans needs to come out and torn down. Good thing its a van those are a snap to get out.

 

I'd like to know what happened in this instance. I have one Thats doing the same thing after I rebuilt it.

 

Then you should have asked three years ago when this thread was active. He never came back.

There were only two possible outcomes with this: Either he had the trans rebuilt or replaced, or he got rid of it. There are no other ways to fix it.

 

There is a complaint forum on google. One E-150 complained but the rest are F-150's with the same trans. Mine started today chugging and struggling to get out of 1st in to 2nd and then starts rolling like normaly. But in reverse it is just like the E brake is on moves and stops immediatly. I am leaning towards a snapring falure from reading the complaints.
Good luck and I will keep posting on the outcome.

 

I have a 2005 with the 4.6L almost 120,000mi it Has the 4R70E I think 14? bolt pan

 

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My van has a 4.2 v6 with a4r70w transmission and I found one but looks different. I had found out it was from a 2001 f-150 2wd pickup. will this work in my van. Old transmission has 155,000 on it and takes 2 to 5 seconds to engage drive gear. My old one has a bump in the tranny pan and the one I found does not.

 

What engine did the pickup have? If it wasn't the 4.2L it won't bolt to your engine.