Krisbod

I have a 2006 Nissan 350z was wonder why the car isn't shifting right like when it should be. In first taking off its more like in 3rd and clunks into gear. It's an automatic, however it only does this some times. I code did briefly come up and I plugged in my code reader and it came up as code p1754. (Input clutch solenoid valve) what can be done to fix this myself if possible I've done some research and see it's pretty much impossible to do yourself and costs about 1500$ for a dealership to fix. Please tell me if you think this sounds about right or if you have any info - Thanks Kris

Unicus

iTrader: (3)

Nothing's impossible to do yourself. Dealerships aren't magical. If they can do it, you can do it.

travlee

iTrader: (8)

not enough info...
what are the miles
have you ever changed the fluid
does it do it at certain times, etc etc etc.

here is the thing sir newbie, we can guess all day long but we cannot properly diagnose or fix your car over the internet

Krisbod

Clearly any things possible but I'm not about to tare the tranny apart in my small garage without a lift if that's the problem just wanted to know if anyone else is experienced this with their 350. It's has 103k for mileage and yes I just brought it to the dealership last week for a auto trans fluid exchange and new plugs and a engine corrosion treatment. It drove fine for two days and is now doing it again. It does it after driving for a little bit sometimes 5 min sometimes a half hour and is not bad a cruising speed but when you try to accelerate is the worse. Especially in first gear try to take off, like I said it acts like it's in 4th gear when it should be in first. Tried using the triptonic shifting and is even worse.

icer5160

iTrader: (4)

If the dealer just changed the fluid, that is very telling. Do you know if they simply did a drain and fill? A flush? Or a full fluid swap?

If the previous tranny fluid was old and never serviced or missed the last few services (I believe the service schedule for the automatic 350Z transmission is every 30k mi, please correct me if I'm wrong), then it is possible some metallic particulates found their way into a solenoid or valve body channel, clogging things up. Usually this kind of thing happens when a transmission "flush" is performed on a high mileage automatic transmission that has NOT been regularly serviced.

Another possibility could be the clutch packs or bands in the transmission. Dirty/old fluid will provide more friction/grip, but this also wears out the internal parts faster. By replacing that dirty fluid with fresh clean fluid, you could wind up creating slipping issues.

Try driving it for a bit longer to see if things improve, it's possible the transmission needs to re-perform a drive cycle test to relearn shift points. If the dealer did the service, they should have done this for you, but you never know. (Unless you have a scan tool handy to see if there is a pending code for this)

If there is zero improvement or if things get worse, I'm afraid the best course of action is dropping the transmission and rebuilding or replacing it.

Good Luck!
-Icer

icer5160

iTrader: (4)

More Info....

The problem with automatic transmission solenoid codes is that they can be generated by either an electrical or a mechanical failure. You could get lucky and only need to replace the electrical component. But based on my experience with my wife's 2004 Ford Explorer transmission (5R55S), the common root cause is not electrical but the internal mechanicals.

But take what I say with a grain of salt, I don't know much about the design of the 350Z automatic transmission(s), I'm basing my responses off of "general" knowledge and experience I have with automatic transmissions.
-Icer