LML shudder

[pavetim]

Anybody hear of the lml and a converter shudder? I noticed it yesterday on my 2015 dually. Towing my 15,000 lbs in the highway at 70 when it downshifts it shudders and jerks really bad. Seems to go away when it hits like a certain rpm or power level. But yeah it jerks the whole truck

 

[Mike L.]

Need better explanation. Need more info on truck and trans history.

 

[pavetim]

Truck has 60k on it, i bought it at 52k. I changed trans fluid and filter with transynd when i bought it. I ryn ridgerunner heavy tow for boat. Its a 2015 dually, crew cab, 8 ft box. What else you need? I do have efilive too

 

[pavetim]

Any opinions or hear about this converter? Planning ahead in case mine is going bad , or should i go with a triple disc from like ATS? https://www.amazon.com/ALLISON-BILLET-DIESEL-TORQUE-CONVERTER/dp/B01N7NI5MX. Or even this ine it looks very good https://revmaxconverters.com/produc...jUcCiKWs2cD3lhLpAxRg0lQh9qW7lnMBoCf04QAvD_BwE

 

[Mike L.]

Data log converter clutch and see what the slip RPM is before you start throwing money at it. If the trans is stock, you probably have clutch damage in the Alli.

 

[pavetim]

Man i sure hope not, didn't plan in spending 5k on a truck just out of warranty. I will log that next time i tow, ill see if there are any codes too

 

[pavetim]

Well no trans codes. Ok i can scan and see if TC is slipping, how can i see if its the clutches in the trans?

 

[2004LB7]

Use your efi live to log the transmission parameters. If you can't tell from that post up the log and we will take a look

 

[pavetim]

No codes, i will see what i can scan next time i tow the boat