Codes P0700, P0733 and P0734, Transmission shift solenoid?

Tiny
NOAH ROBINSON
  • MEMBER
  • 2005 DODGE TRUCK
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 245,497 MILES
I was having an issue with the shifting where my truck would get stuck in 4 gear and I was getting the code P0700 and P0734, so I figured the shift solenoid pack was bad. So, I replaced the filters, the solenoid pack and the transmission fluid. The truck was driving fine and shifting good, till I was about back home after 20 minutes of driving, then it stopped shifting into 4th and then 3rd, and now I have the codes P0700/P0733/P0734 for incorrect gear ratio for 3rd and 4th gear, I’ve reset the TCM by disconnect the battery for an hour and having the positive and negative cable touching so that it all drains completely. Still having the same issue, I’m thinking I got a bad solenoid pack.
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Monday, January 22nd, 2024 AT 11:56 AM

7 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Yep, I agree with you that you may have a defective solenoid pack, but I would double check the wiring connector to see if it is clean and tight. Also, It could be the turbine sensor is off and causing this issue.

P0700 is a generic code, meaning it serves as a notification to check further into the transmission system for specific errors.

P0733 - Gear 3 Incorrect Ratio: This code suggests a specific issue with the third gear of the transmission.

P0734 - Gear 4 Incorrect Ratio: Similar to P0733, but this code relates to the fourth gear.

The solenoid pack has a torque setting that must be used. Swap out the unit and then clear the codes to see what happens. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.
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Monday, January 22nd, 2024 AT 12:15 PM
Tiny
NOAH ROBINSON
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Everything was torqued down to specs, do you think there’s a possibility that because it was a new solenoid it shorted the speed sensors causing them to stop working hence why the truck isn’t shifting into the higher gears, or even the oil pressure sensor for the transmission.
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Monday, January 22nd, 2024 AT 3:57 PM
Tiny
KEN L
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  • 42,288 POSTS
Yes, these are all possible, but since they are ratio codes, I would do the speed sensor first. Does the transmission slip at all when it was working?
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Tuesday, January 23rd, 2024 AT 10:15 AM
Tiny
NOAH ROBINSON
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No, it wasn’t slipping, when it first had issues after putting in the new part it was saying incorrect gear ratio for 4th and 5th gear and now it saying it for 3rd and 4th gear, it acts like it goes into neutral when you get to 3rd gear, unless you go from 0-60 at high rpm’s then it will shift to 3rd but won’t shift to 4th but then if you take your foot off the gas it drops 3rd and acts like it’s in neutral again, when I originally opened the trans the fluid was clean and good still, and there were no metal shavings in the pan at all.
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Tuesday, January 23rd, 2024 AT 10:41 AM
Tiny
KEN L
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Yep, I would try the sensor and if that doesn't help you have a defective solenoid pack.
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Wednesday, January 24th, 2024 AT 9:44 AM
Tiny
NOAH ROBINSON
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I replaced the speed sensors and that didn’t fix it, I just replaced the solenoid pack and I’m still having P0733 and now I’m getting a P0750, I’m a little lost at this point and I’m unsure what to do.
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Thursday, February 1st, 2024 AT 10:06 AM
Tiny
KEN L
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Code P0750 in the context of a 2005 Dodge truck refers to a problem with the "Shift Solenoid A" So are these rebuilt part or used? You may have a bad PCM. Lets check the wiring between the PCM and transmission. This guide will help and if the wiring checks out I would replace the PCM, I marked the ground to be checked as well, you can get a preprogrammed unit by searching Google or Ebay.

https://www.2carpros.com/articles/how-to-check-wiring

Check out the images (below). Please let us know what happens.
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Friday, February 2nd, 2024 AT 9:28 AM

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