Question about 2004 Nissan Maxima

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Car hits hard when stepping on gas

I have a 2004 maxima i tool it to dealership complaonong that when i slow down then stepon gas it slams hard or when turning a corner than again stepping on gas it slams hard. they told me they couldnt produce the problem. when i got it back it stopped for 2 weeks and now it started back. It seems like more now. I told them it might be motor mounts. they said no and that the transmission was fine too. can u help its driving me nutts. can you tell me where the mounts are located and how there suppose to look so i can check them out. I think the dealership is tryingto get over on me because i still have it under warranty.

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Ok, I am about to solve the mistery on the transmission problems with these 2004 and 2005 Nissan Maxima.
I had 2 Maxima's 2004, let's call car A with a bad transmission and good motor, and car B with good transmission and bad motor.
1. I swap engines from car B to car A, after that, car A runned good with not a single issue.
2. Car B was with out and engine and a bad transmission,
3. I found a motor and transmission from a wrecked salvage 2005 Nissan Maxima with only 25,000 miles in it,
4. After the installation of the good engine and transmission on car B, I found a broken solenoid,
lets call the good engine and transmission (SET).
5. Remember car A is fixed, but car B had a bad transmission.
6. After removing the bad transmission from car B, the SET had a broken transmission solenoid called (pressure control valve solenoid) cause by the accident, the transmission valve cover had a small dent, right where the solenoid is, that how it got broke,
7. Since I still had the bad transmission from car B, the solenoid from that transmission were good in shape, so I thought I was lucky enough to swap the solenoid from car B to the SET,
after I did that I was good to go very confident that car B was going to run fine, but it did not.
8. Car B with a 25,000 miles SET end it up doing the exact same problem that it had before with the transmission, it is near impossible that the problem is the wear on the valve body since the SET only has 25,000 miles and I only swap the solenoid. 2 of them to be exact.
8. Now I am in the market to buy just the 2 brand new solenoids and cross my fingers, Nissan for some reason, they dont want to sell the solenoids by them self, you need to get the complete valve body assy. and shops are happy with that idea cause it is more money on the pocket for dealers and shops, so I hope is the solenoids, they are really easy to replace, just by removing the valve body cover and remove 2 bolts, 1 for each solenoid and that's it. I called one guy who owens a shop and I ask him if he sells the solenoids remanufactured and he started yelling cause he is thinking that we are stupids since he had many people asking about these solenoids and he is saying that the problem is the valve body it self, he make me mad because I only asked him for the solenoids not to try to make me buy the new valve body assy. I will follow up after I find the solenoids and replace these on my Maxima just to confirm, any questions e mail me back at aslk1209@hotmail.com thanks

Posted on Jun 04, 2011

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In my experiences, the problem you are describing usually is caused by a loose or bad motor mount(s). On that car, I believe there are two motor mounts underneath the car connected to the crossmember, and then one on each side of the motor (going horizontally) close to the top of the engine. More than likely, one of the motor mounts towards the bottom of the car (going vertically while looking into the engine bay from the front of the car) is loose or bad. They will go bad over time and also go bad prematurely if they get coated with oil, gas, etc. A bad motor mount will be soft when you move it around. If you notice the problem more when it is warm/hot outside and when the engine is warm, more than likely this is your problem. If no codes are popping up, then the electronics and transmission should be fine, especially if you have a cvt transmission.

Posted on Jan 07, 2009

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Personally I would take it to another reputable shop in the area for a diagnosis & estimate. My guess is that the cost wouldn't be too much if anything, and then you have an expert opinion to go on, how can they dispute it ? If it's nissan warranty, call their customer service number in your manual, and get them working for you too. A Transmission or motor mount problem could also be diagnosed by a good transmission shop.

Posted on Jan 07, 2009

  • checker2680 May 01, 2011

    I have an 04 maxima it was doing the same thing I got it check out by more than 1 shop the problem was the tranmission was bad I had to get it rebuild which would cause u about $2,500 if it a 5 speed automatic transmission if it's a 4 speed it would be around 1,500. Hope that help.

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