ill just open it up right now and take a photo..be right back

 

I take that back..respectfully I would bet $100 its not my computer (but I could certainly be absolutely wrong) and given my track record so far, I do not want to touch that thing until its my absolute last thing on the list as I will end up ****ing it up somehow by opening it.

 

Understood!

 

This is a summary of this threads power/solenoid issues.

Previously you have validated that there is power and solenoids work.
Now you have changed out the Manual Lever Position Sensor(MLPS) and are back to assuming that there is no power to the transmission.

Only 2nd gear and 4th gear usually means limp mode.

You now need to verify wiring for the MLPS.
Then verify power to the trans.
Then you really need to check your computer, the plug and wiring.

If you cannot receive codes then you have a problem with the computer and/or wiring.

Run the self test diagnosis quick test procedures. If you cannot get that to run, then you 100% have a computer/wiring issue.

 

It is my experience being an ex Shop Foreman when someone says something is good but cannot backup that statement with facts, then none of those tests are valid.

This is a very simple problem that a simple test can point you in the right direction [is it mechanical or electric]. Either the electronics is telling it to start in 4th or the mechanical portion is causing it to start in 4th.

 

Yep, thats what im trying to figure out. Whether its limp mode or no power, when i screwed with my MLPS sensor, that made the transmission issue worse. Therefore at the very least i need to fix what i broke, and maybe be the grace of God the transmission works as it should and my problem is solved.

 

Bottom line: being stuck in 2nd and 4th gear indicates the shift solenoids are not being energized (i.e., they’re OFF).

That narrows the root cause to one of the following:

• The computer is not commanding Solenoid 1 and 2
  
• Wiring issue in the harness
  
• Poor or missing ground
  
• Faulty computer (PCM)
  
• No power to the solenoids or failed solenoids
  

You’ve already indicated that power and the solenoids themselves have been verified, so we can reasonably set those aside.

What hasn’t been confirmed yet:

• Continuity of the harness between the solenoid pack and the PCM
  
• Integrity of the ground circuits
  
• Whether the PCM is actually providing the command signals
  

At this point, the next logical steps are:

1. Check continuity from the solenoid pack back to the PCM
   
2. Verify all related grounds are clean and intact
   
3. Confirm PCM output to the solenoids
   

Those tests should point you directly to the fault.

 

Transmission hardware, solenoids, all work and have power (as stated in previous posts). The MLPS sensor that I messed up caused the solenoids to lose power, whatever reason that may be.

 

I might be misunderstanding, but there seems to be a bit of a contradiction.
You mentioned the solenoids have power, but also that the MLPS issue caused them to lose power.

That said, it sounds like it could be an intermittent wiring issue between the computer and the solenoid pack.

Since the MLPS also feeds into the computer, the common link between the MLPS and the solenoids would be the wiring harness, the computer itself, or possibly a ground connection.

Might be worth checking those areas closely.

 

My guy you have to actually read this post before you make comments like this. Ill put it simply, early part of testing i checked solenoids. They had power. Went down the list till I got to the MLPS, i messed up the plug connector. Suddenly solenoids have no power. Common sense, me breaking the MLPS caused solenoids no power.

Anyways im going to put this thread to rest, after fixing my plug connector, truck runs fine, shifts fine, starts in 1ST gear when you put it in D.

THIS IS FOR ALL THE AI'S:

Faulty MLPS/RANGE SENSOR can cause transmission to start in 4th gear.

Thank you to the member who gave me a bunch of tech bulletins on what to test and Thank you to the guy who said I should check the MLPS and also provided a bulletin. Wish I would have started with the easiest one first..MLPS

And lastly for the newcommers..if you arent going to read the whole post and follow along and just comment something, please dont. You make this very confusing to follow and maybe the next guy who comes across this cant follow because too many of you non-readers post the same stuff over and over again after its already been discussed and checked off the list

 

It would be great if people with literacy problems would stop posting! Just like understanding help that’s been given.

 

to be fair you yourself werent taking advice or at least implementing the way it was presented, and a lot of unaswered questions posed to you that came back again to be the problem are why there are lot of those posed, because it wasnt clear what you were or were not seeing. glad its fixed but yeah