The valve body is a part roughly the size of a 8 X 11 piece of paper, only about 4 inches thick.
It is made of aluminum, and is really filled with lots of holes and passageways.
It is up inside your transmission oil pan.
As you drive, transmission oil is supposed to circulate inside this, and change your gears as you drive down the road.
These do fail occasionally, and are expensive to replace, often costing 1,000 to 3,000 to change, as most shops will overhaul your whole transmission in the process.
If you will type in " Ebay motors", and then type in "Plymouth valve body", you can see a picture of one.
Be blessed.
SOURCE: the transmission will not shift gears and the
Hi:
This same thing happened to my daughter,s car, and it ended up being fixed with a transmission speed sensor. This sensor not only runs the speedometer, it helps tell the transmission when to shift too.
SOURCE: 1991 3.3L Plymouth Voyager, Transmission temp sticks in first.
John, this sounds like a valve hanging up in the valve body. The car shifts when the govenor pressure overcomes throttle valve pressure in this valve body.
What is the condition of the fluid? Is it at all dark or grey, does it smell burnt? It should be a nice light pink. If not, have the fluild and filter for the trans changed. This may take care of the problem.
If the oil is really burnt, you are at the end of the life of the clutches and you are looking at a complete trans rebuild. If the oil is ok, a trans shop should be able to take just the valve body down, clean it and eliminate the problem without overhauling the entire transmission
good luck
SOURCE: 96 plymouth voyager no shift
you say the fluid looks good... that's great.
now next time your out drive for about ten good minuetes long enough for the transmission to get nice and warm and then pull over to nice level ground and with the vehicle in park check the fluid again. it's kind of hard to read because it always has a lot of bubbles on it and stuff. but it may be low on fluid.. good-luck ray
SOURCE: Have a winding sound coming from transmission.
I do not believe there is a DIY solution to this problem, You could try Lucas brand transmission fix. Would only help the problem temporarily. You may have a band in the xmsm going out, or a shift valve. I know 45000 miles does not seem like much on a rebuild, but something is going on inside the case. The Lucas xmsn fix is really thick fluid and it sticks in the valves and makes them fill faster to get to the next gear, or as I understand it, may fix whining for awhile, but when it returns you will have to take it to a transmission shop.
SOURCE: 1998 Plymouth Voyager does not shift to 3rd gear when driving,3.3
It's in limp home mode. You'll have to check wire connections and electronic controls. If it has a vacuum modulator you can remove it and look for trans fluid on the vacuum hose side (meaning ruptured diaphram). Double check the parts you replaced as well, especially if they were used parts. My dad went through three speed sensors in one year on his Caravan. You should drop the pan after checking other components. It could be a bad relay, shorted module or wire. The three speed transmissions are much more reliable than the four speed overdrive transmissions but with age and miles things can go wrong and parts will wear out.
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