Torque Converter Discussion

14silverado4.3 · December 10, 2015

I am interested in some different expert opinions regarding torque converter shudder.

My vibration seems to be when torque converter locks up. I do not have vibration at down shift.

I have vibration soft pedaling thru town. If I run it harder, I do not seem to feel the vibration.

Highway driving / cruising at 65 plus gets a vibration - torque converter locked up?

Would a TC shudder get worse when the motor goes from V6 to V4?

I know only very little about the function of the torque converter.

How can it be tested to determine if this is a potential root cause? What systems do our trucks have that would be wearing out that would allow us to feel shudder at lock up? Engine mounts?

Will the torque converter lock up in M5?

With those that have tunes or tuned out AFM, did it change the vibration harmonics / frequency because shift points were adjusted?

I know there has to be some experts on here who know the workings of automatic trans and torque converters!

rshad · December 10, 2015

I can't answer your question proffesionally but I once had a TC shudder in my F-150 that I use to have and it felt a lot different then the vibration that I am getting in my 2015 Sierra. Back then the problem was bad fluid in the torque converter, it was to thick. just a thought.

Also I am getting my vibration starting at 46mph then goes away at around 55 and starts again at 64mph.

southern_sierra · December 11, 2015

I am interested in some different expert opinions regarding torque converter shudder.

My vibration seems to be when torque converter locks up. I do not have vibration at down shift.

I have vibration soft pedaling thru town. If I run it harder, I do not seem to feel the vibration.

Highway driving / cruising at 65 plus gets a vibration - torque converter locked up?

Would a TC shudder get worse when the motor goes from V6 to V4?

I know only very little about the function of the torque converter.

How can it be tested to determine if this is a potential root cause? What systems do our trucks have that would be wearing out that would allow us to feel shudder at lock up? Engine mounts?

Will the torque converter lock up in M5?

With those that have tunes or tuned out AFM, did it change the vibration harmonics / frequency because shift points were adjusted?

I know there has to be some experts on here who know the workings of automatic trans and torque converters!