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samuel donohue Posted on Nov 08, 2018
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Nitro. Why doesn't it upshift?

Code 0750

1 Answer

Anthony

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  • Expert 419 Answers
  • Posted on Feb 27, 2023
Anthony
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If your vehicle with a Nitro engine is not upshifting and you're getting a P0750 code, it indicates that there is a problem with the shift solenoid "A". This solenoid is responsible for controlling the hydraulic pressure inside the transmission that helps to activate the clutches and bands that are responsible for shifting gears.
There are a few reasons why the shift solenoid "A" may not be functioning properly, which could lead to the transmission not upshifting. These reasons include:

  1. Malfunctioning Shift Solenoid "A": The shift solenoid "A" could be faulty, stuck, or damaged, preventing it from functioning properly.
  2. Wiring Issues: There could be issues with the wiring or connections leading to the shift solenoid "A," which could cause it to malfunction.
  3. Low Transmission Fluid: If the transmission fluid is low or dirty, it could prevent the shift solenoid "A" from functioning properly, causing the transmission to not upshift.
  4. Internal Transmission Problems: There could be internal problems within the transmission, such as a clogged valve body, damaged transmission bands, or worn clutches, which could cause the shift solenoid "A" to malfunction.
It is recommended to take your vehicle to a certified mechanic or dealership to diagnose and repair the issue, as transmission issues can be complex and require specialized knowledge and equipment to fix properly.

2 Related Answers

autodr

autodr

  • 260 Answers
  • Posted on Dec 02, 2008

SOURCE: 2002 dodge neon code p0750

im not a trans. expert but would verify the range sensor (gear indicating sensor) is working properly and the L/R solenoid is ok. those are the 2 suspects for your problem

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rlandis8

Ryan Landis

  • 16 Answers
  • Posted on May 01, 2010

SOURCE: i have code P0750 and HOW I REPAIR this?

Sounds to me like a solenoid. I believe thats the low reverse solenoid which if I'm not mistaken would allow your durango to kick into Overdrive. They run about $125 and you need to drop the pan on the tranny after draining the fluid and disconnect the wiring and remove the old one and do the reverse to put it back together with a new seal, and you might as well change the filters too (durango has 2). Fill it with ATF-4 fluid, 6 quarts i think and you should be good to go.

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