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Old 02-16-2011, 08:19 PM   #31
grog11
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Re: 03 windstar mo reverse

Test gauges are around $100. for a set, you may try getting a shop to do the test.Really any 0-300psi gauge, 1/8" NPT thread should get you hooked up for a reading, you could use reducer and a pipe nipple if you needed

Do a Search for 4F50N Parts
http://www.makcotransmissionparts.com/AX4N.html

http://www.sonnax.com/product-lines/transmission

Torque Converter
http://cgi.ebay.com/ebaymotors/Ford-...Q5fAccessories
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Old 02-16-2011, 08:52 PM   #32
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Re: 03 windstar mo reverse

ok i poured it in while it was warm drove it downthe road. and still no reverse. so i went out to a 2mile straightaway we have and stopped in the middle and put it in reverse I watched and paid attention to everyting. I had to tach it up to bout 2500 and it slowly came in and then it was like it just went in full and it took off like a rocket stopped and tried it again and same thing it pulled perfect. its just like a high stall converter in a race car high rpms then goes in. so i thought id go to a small hill and stopped at bottom coming off of hill and put it in reverse and once it grabbed it pulled no problem up the hill i only went 30ft or so not all the way up. so I guess i could say it isnt clutches right?
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Old 02-16-2011, 08:55 PM   #33
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Re: 03 windstar mo reverse

Sounds like the clutches are ok and most likely you have a valve body problem, maybe some debris got caught inside and keeps the fluid from flowing freely until high pressure breaks in, which is good because you wont have to take the whole transmission out; this can be done from underneath the vehicle.

Best regards,

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Old 02-16-2011, 09:03 PM   #34
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Re: 03 windstar mo reverse

Now that you got reverse going, with the seafoam, keep trying reverse, and drive the thing around to let it clean the internals well. Do you have a spot where you can run it in reverse a while, or just raise up the front wheels , start it and run reverse for several minutes to let the fluid clean things up.Drive the vehicle to let the fluid clean things.
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Old 02-16-2011, 09:20 PM   #35
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Re: 03 windstar mo reverse

found this on the sonnax site grog suggested.

http://www.sonnax.com/publications/t...t-de-nonretour

is this transmission original? were there some modifications done to it? perhaps why you aren't getting a code thrown?
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Old 02-16-2011, 09:23 PM   #36
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Re: 03 windstar mo reverse

SWEET i guess ill try to get a gauge and test it and if so ill take the valve body off and go from there. thanks guys you all r great!!! I graduated a tech school for automotive but transmission's wasnt my best course and what they did teach was on a th350 and a JUNK 700r4 witch my opinion theyre junk new. so is there any where i can get like pictures or micropfiche or exploded view of trans or at least valve body?
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Old 02-16-2011, 09:31 PM   #37
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Re: 03 windstar mo reverse

Matthew, I'll send you all information I have on the transmission, it is a big file so I'll send it to your email.

By the way, I like the interests you cited in your profile

Best regards,

Oscar.
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Old 02-16-2011, 09:34 PM   #38
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Re: 03 windstar mo reverse

Attached a trans file, uploaded it and nothing on the site. I guess I don't have authorization or something. I will pm you.
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Old 02-16-2011, 10:27 PM   #39
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Re: 03 windstar mo reverse

great my e mail is matthewhughes224@att.net thanks
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Old 02-16-2011, 10:40 PM   #40
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Re: 03 windstar mo reverse

Quote:
Originally Posted by huey224 View Post
ok i poured it in while it was warm drove it downthe road. and still no reverse. so i went out to a 2mile straightaway we have and stopped in the middle and put it in reverse I watched and paid attention to everyting. I had to tach it up to bout 2500 and it slowly came in and then it was like it just went in full and it took off like a rocket stopped and tried it again and same thing it pulled perfect. its just like a high stall converter in a race car high rpms then goes in. so i thought id go to a small hill and stopped at bottom coming off of hill and put it in reverse and once it grabbed it pulled no problem up the hill i only went 30ft or so not all the way up. so I guess i could say it isnt clutches right?
Yes your clutch bands are good. Because when the problem is the clutch, it always slip. In your case, it almost no grab, then it grab completely and suddenly. When you rev up, there's more hydraulic pressure cause trans oil pump spin faster. And when car is moving, it requires less pressure on clutch to grab the steel plate, thus gear train, since they are both already moving, so there's no need to add extra inertia. Also less friction on tires at motion, so more easy to pull.
So it's definitively an hydraulic problem.

But on Windstar, valve body is a good quality part, and rarely fail. The weak point on Windstar are the pistons clutches. They tend to crack, and leak pressure. So some of the oil go past the piston clutch. So don't be sure that cleaning or replacing the valve body will necessary fix the problem. So the problem is more probably the reverse piston clutch.
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A Windstar without having the check engine light is not a real Windstar.

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Old 02-16-2011, 11:03 PM   #41
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Re: 03 windstar mo reverse

I think again about it, my best suggestion would be, if your sea foam doesn't work, installing a brand new tranny. In my opinion, it doesn't worth to rebuilt a tranny only to repair a reverse problem, other parts of the trans may fail few years later. If you put a new tranny, it will cost more, but will last many years w/o expecting other trans issues.
Reman tranny is not good either.
Used tranny may be advantageous, but it could be a risk.
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Old 02-16-2011, 11:12 PM   #42
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Re: 03 windstar mo reverse

Quote:
Originally Posted by serge_saati View Post
I think again about it, my best suggestion would be, if your sea foam doesn't work, installing a brand new tranny. In my opinion, it doesn't worth to rebuilt a tranny only to repair a reverse problem, other parts of the trans may fail few years later. If you put a new tranny, it will cost more, but will last many years w/o expecting other trans issues.
Reman tranny is not good either.
Used tranny may be advantageous, but it could be a risk.
Listen to what he says, he really knows what he is talking about.

In any case I sent you 2 e-mails with all the information I have.

Best regards,

Oscar.
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Old 02-16-2011, 11:35 PM   #43
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Re: 03 windstar mo reverse

ok thanks guys but how hard is it to replace the reverse piston?
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Old 02-17-2011, 12:20 AM   #44
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Re: 03 windstar mo reverse

Accumulator Pistons & Springs behind valve body. #15 is reverse in the photo.

Item ³ Part Number ³ Description ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 1 ³ 7005 ³ Case assembly ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 2 ³ 7H276 ³ Shaft Ä drive shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 3 ³ 7G095 ³ Seal Ä 1-2, 2-3 and N-D shift ³
³ ³ ³ accumulator piston ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 4 ³ 7G274 ³ Piston Ä drive shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 5 ³ 7G300 ³ Spring Ä drive shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 6 ³ 7G301 ³ Spring Ä drive shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 7 ³ 7H277 ³ Seal Ä drive shift accumulator ³
³ ³ ³ cover ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 8 ³ 7H275 ³ Cover Ä drive shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 9 ³ N807757-S ³ Bolt Ä 6 mm x 1.0 hex flange ³
³ ³ ³ head (1 req’d) ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 10 ³ 7G094 ³ Shaft Ä shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 11 ³ 7G266 ³ Spring Ä 3-4 shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 12 ³ 7F248 ³ Seal Ä 3-4 accumulator piston ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 13 ³ 7F246 ³ Piston Ä 3-4 shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 14 ³ 7E485 ³ Spring Ä reverse shift ³
³ ³ ³ accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 15 ³ 7H274 ³ Seal Ä reverse shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 16 ³ 7H273 ³ Piston Ä reverse shift ³
³ ³ ³ accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 17 ³ 7F285 ³ Spring Ä 2-3 shift accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 18 ³ 7G095 ³ Seal Ä 1-2, 2-3 and N-D shift ³
³ ³ ³ accumulator piston ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 19 ³ 7G133 ³ Piston Ä 1-2, 2-3 shift ³
³ ³ ³ accumulator ³
ÃÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
³ 20 ³ 7G267 ³ Spring Ä 1-2 shift accumulator ³
ÀÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÁÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÙ
Attached Images
File Type: jpg 4F50N Accumulator Pistons.JPG (105.9 KB, 15 views)
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Old 02-22-2011, 11:37 AM   #45
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Re: 03 windstar mo reverse

would it help if I took it to a shop and had the trans flushed? would that maybe help it? it seems like its trying to work a little better sice i changed the fluid but i figured a flush would get it all out of the tourqe converter and the valve body and might help it
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