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Limp mode???

Jared Miller

By Jared Miller
in Engines & Drivetrain

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Jared Miller New Member

Jared Miller

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2018 chevy silverado 1500 with less then 110,000 miles on it. Truck gets up to around 33 mph then goes into neutral. Once it slows down to around 25 it'll let me speed back up to 33 then back to neutral. Thought it was my rear speed sensor. Got it replaced and it's still doing it. Any ideas? From the research I've done everything is pointing to the transmission is going out of it. Any help would be appreciated. 

newdude Senior Enthusiast

newdude

Posted
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19 minutes ago, Jared Miller said:

2018 chevy silverado 1500 with less then 110,000 miles on it. Truck gets up to around 33 mph then goes into neutral. Once it slows down to around 25 it'll let me speed back up to 33 then back to neutral. Thought it was my rear speed sensor. Got it replaced and it's still doing it. Any ideas? From the research I've done everything is pointing to the transmission is going out of it. Any help would be appreciated. 

 

 

What's the transmission temps when its doing this?  If you see it way beyond 210F and climbing, transmission is gone.  Torque converter, pump and possibly more.  

Jared Miller New Member

Jared Miller

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  • Author
Posted
54 minutes ago, newdude said:

 

 

What's the transmission temps when its doing this?  If you see it way beyond 210F and climbing, transmission is gone.  Torque converter, pump and possibly more.  

It's staying around 180-190

rlcole321 Enthusiast

rlcole321

Posted
Posted

Have you tried to shift it manually?, have you look at the fluid, is it burnt or dark colored?.

Jared Miller New Member

Jared Miller

Posted
  • Author
Posted
10 hours ago, rlcole321 said:

Have you tried to shift it manually?, have you look at the fluid, is it burnt or dark colored?.

Yes, it shifts fine manually. Fluid looks good. 

  • 1 month later...
rlcole321 Enthusiast

rlcole321

Posted
Posted

well if it shifts ok manually then sound like a TCM issue, may need to "Reflash" a program to the TCM, if it shifts ok in manual mode then the hardware should be fine. 

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