How to replace shift solenoids?

There is more than one shift solenoid on the transmission. They are all located under the cover on the transmission and can be replaced as a unit but before you do that, why do you think one of them is the problem? A code? Poor shifting? They say you should replace the valve body and shift solenoids all at once here is the location. Check out the diagrams (Below). Please let us know what happens.

Well when i had bought the car the man had it checked thoroughly with paper work . And recently I went to get the shift solenoid but that day and say prior my car would actually stall in the middle of driving it. So I had bought the rear and front crank shaft cam. However, i just needed the front. Rear sort of made worse with the jerking. Which leads me back to the solenoid. While driving though especially freeway mph and I am having to slow down it jerks and than when I am putting car into drive,almost as if it is skipping first and auto goes to second, the rpm go a little wild. And only does while in automatic. Being I can drive as manual as well, if driving in manual though, the cars perfect.

Okay, you have the common Nissan trans problems. The best solution I have seen for this is rebuilt valve body you can find one by searching ebay.

I have a 2000 maxima, the car would not shift to 4th gear and the overdrive is not working. I replaced the transmission with a 39,000 transmission from an accident car and I am still getting the same code saying the transmission solenoid is faulty. Is there another thing I should check before I send the transmission back to the junkyard. Note the other gears shift okay.

the transmission solenoid itself is what allows an automatic to shift into the overdrive gear it would be a lot cheaper just to change this first.