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2014 5.3L 6 Speed RPM Fluctuations

morrislee

By morrislee
in Troubleshooting & Recalls

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HondaHawkGT Senior Enthusiast

HondaHawkGT

Posted
Posted

Are you tuning it yourself? You may need to consult other forums where there are individuals that might have seen this sort of behavior from the 6L80 before. Odd's are you're not the first guy to have this happen.

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ic3man5
ic3man5

Some more reading:   http://www.transtar1.com/TranstarIndustries/media/Transtar1/technical/bulletins/TLT-TC-035.pdf   This is normal behaviour of the transmission and nothing to worry about.   e

HondaHawkGT
HondaHawkGT

Might be worthwhile to make a post in the tuning section. Maybe somebody knows how ambient temps come into play in the TCM/TCC apply pressures.

morrislee Enthusiast

morrislee

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Are you tuning it yourself? You may need to consult other forums where there are individuals that might have seen this sort of behavior from the 6L80 before. Odd's are you're not the first guy to have this happen.

 

Had a professional tuner sat next to me monitoring all the issues. He managed to balance my fuel trim and added the torque converter pressure. Seems to reduced the issue but still happened yesterday. He is going to continuously to help me fine the issue and if it is hardware, he will try and get me evidence that warranty needs to cover.

  • 1 month later...
morrislee Enthusiast

morrislee

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Update on this, got code P050D, someone else with exact same motor had the same code, which he eventually found that he has misfires in few cylinders. I monitored mine when it was -2c out, sure enough, cylinder 7 misfiring like crazy, everything other cylinder sees 1-2 misfires at rare occasions

 

I hope this is the root cause of it.

  • 2 years later...
Olivier Quirion New Member

Olivier Quirion

Posted
Posted

i have same problem with 2010 silverado 5.3L with 6th speed, but no misfire codes, it does it after about 20 minutes of driving on highway at 65-70 on flat road, it revs up 300-400 rpm for 1-2 minutes (does it also on manual mode on 5th speed) and goes back to normal and will not do it again for at least 30 mins. Can it be related to misfire even if no codes?

  • 1 year later...
bradharris.uci@gmail.com New Member

[email protected]

Posted
Posted

My 2015 silverado with now 90,000 miles on it started fluctuating on the RPM gauge on my way to work. i kind of felt a little jerking to it going up hills. i continued to drive it, as i was already 2 1/2 hours from home and still had 2 1/2 to go to where im currently working, by the time i noticed the jerking and fluctuation. when i finally come to a complete stop in a drive thru to get something to eat the vehicle would not move forward any longer, but would struggle in reverse.

 

any advice on where to start looking for an issue would be greatly appreciated. thank you.

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