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Ok so I have this annoying automatic transmission sound . 2001 7th gen vtech anyways I have video of the noise you might turn the volume down on your device for this.
I have replaced the 3rd gear switch or shift control solenoid and now the car is having issues in the lower gears could this be the other solenoid on the right side of the trans? about 2 weeks ago I tested both solenoids with my snapon scanner and the solenoids were clicking as they should but I feel like solenoid A has gone out.
not sure if i should just find another trans or save this one.
any thoughts on this matter would be greatly appreciated. thanks ahead for your time.

 
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getting the A/T clutch pressure control solenoid A and B in a couple of days. already replaced the shift solenoid A and B also the 3rd gear solenoid under the thermostat housing. I will update once i get the part in.

 
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The old sensor was completely trashed and the o rings on it were in horrible condition.
it fixed my D- light flicker for a little while. But, then it started flickering again so I chased all my grounds and sanded the areas down and replaced all the 10mm bolts with new ones then sprayed them with battery protector.
That alone made a world of difference through out the whole system.
We often have to clean up grounds @ Nissan .
The car drove fine then a domino effect happened replaced another solenoid and now about to replace the last solenoid when it shows up.

 
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Incorrect gear ratio p0730 I will be ordering a transmission rebuild kit yay me!!!!