AT Transmission Issue, desperate help needed!
#1
AT Transmission Issue, desperate help needed!
2003 G35 Sedan RWD 188,000km Automatic.
Just recently got a code. P0745 - Pressure Control Solenoid A.
When driving it doesn't shift from 1st to second at the proper RPM, it shifts a lot higher and when it does it jerks, similar to letting the clutch go in a manual car very fast.
I read extensively about this. Transmission was always maintained, J-matic oil every 80,000km.
I dropped the pan, oil didn't look so bad, cleaned magnets, and topped it with new J-Matic fluid from Nissan.
I was no longer getting the code, and after a bit of driving it started to run good. I was a happy camper, and thought I had fixed the problem. Two days later, and it started doing it again, the exact same thing, but again no codes.
I had it at a transmission shop, very known for their work and great people. They had the car for two days doing diagnostics on it, and they concluded it's the transmission, but when I told him about the situation, he said it doesn't hurt to try and replace the solenoids and valves, but he couldn't find anything on his diagnostics leading to that.
I refuse to give up just yet, as I am still about to replace the pressure solenoid and valve to try if that fixes the issue before I start my transmission shopping.
Has this ever happened to anyone? Can I replace just the pressure solenoid and valve, or I need to replace all the solenoids and valves?
This seems a little too soon for the transmission to go. It has 188,000km, which roughly translates to about 130kmiles. My wife drove it all the time, and she's a careful driver.
Any insight, advice, or help would be extremely appreciated.
Thank you in advance.
Just recently got a code. P0745 - Pressure Control Solenoid A.
When driving it doesn't shift from 1st to second at the proper RPM, it shifts a lot higher and when it does it jerks, similar to letting the clutch go in a manual car very fast.
I read extensively about this. Transmission was always maintained, J-matic oil every 80,000km.
I dropped the pan, oil didn't look so bad, cleaned magnets, and topped it with new J-Matic fluid from Nissan.
I was no longer getting the code, and after a bit of driving it started to run good. I was a happy camper, and thought I had fixed the problem. Two days later, and it started doing it again, the exact same thing, but again no codes.
I had it at a transmission shop, very known for their work and great people. They had the car for two days doing diagnostics on it, and they concluded it's the transmission, but when I told him about the situation, he said it doesn't hurt to try and replace the solenoids and valves, but he couldn't find anything on his diagnostics leading to that.
I refuse to give up just yet, as I am still about to replace the pressure solenoid and valve to try if that fixes the issue before I start my transmission shopping.
Has this ever happened to anyone? Can I replace just the pressure solenoid and valve, or I need to replace all the solenoids and valves?
This seems a little too soon for the transmission to go. It has 188,000km, which roughly translates to about 130kmiles. My wife drove it all the time, and she's a careful driver.
Any insight, advice, or help would be extremely appreciated.
Thank you in advance.
#2
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I drove ttrank's car solo
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#5
If it isn't actually slipping then it probably isn't an internal issue. I had a similar problem with a 626 V6 I used to have. A solenoid was going bad and it would shift hard enough on the 1-2 upshift that it would chirp the tires. Basically it was shifting at full line pressure. Car was hit from behind and totaled before I could fix it.
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I drove ttrank's car solo
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G35 sedan w/ too much money in mods
#12
I've been doing a lot of reading, and some of these cars had TCM issues and people had to replaced their TCM.
I have an appointment with the stealer tomorrow.
In another note, I have a 2003 VW Passat, and I have VAG-COM for it, which is similar to CONSULT for Nissan, and I've been looking for CONSULT software online with no luck, apparently only a dealer thing, which is a bummer.
Thanks for your help anyway
#13
I drove ttrank's car solo
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#15
Hi, guys. I have issue with my G35.
I replaced front bearing hubs already, brake rotors front and rear. But after 60mph - noise same.
Service guys said that need to replace front bearing hubs - they replaced - same thing.
Also with my uncle checked rear wheels - we lifted and check rear wheels in air by running. In lifted position - no that noise. Very weird.
Could somebody specify what's noise? Looks like noise from the front? Probably transmission. I bought that car two months ago. And before go to Los Angeles from San Jose decide replace front hub bearings and brake rotors. But still noisy - I very scared that car will destruct in that trip, but still alive.
I did make video with that noise. Please help.
Here's video -
Trrr....r.rr.r.r... sound.
Thanks.
I replaced front bearing hubs already, brake rotors front and rear. But after 60mph - noise same.
Service guys said that need to replace front bearing hubs - they replaced - same thing.
Also with my uncle checked rear wheels - we lifted and check rear wheels in air by running. In lifted position - no that noise. Very weird.
Could somebody specify what's noise? Looks like noise from the front? Probably transmission. I bought that car two months ago. And before go to Los Angeles from San Jose decide replace front hub bearings and brake rotors. But still noisy - I very scared that car will destruct in that trip, but still alive.
I did make video with that noise. Please help.
Here's video -
Thanks.
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