trans shutter

[Blwnl36]

When driving and steeping on the accelerator and truck wont Downshift from OD and rpms are below 1k it seem to buck. is this a possible trans issue? could it be the plugs?

 

[Tha1Mike]

I would say plugs.

 

[rburch]

I would say COP! Check to see if any of them are cracked on the top and replace any that are!

 

[CARO'S98EB]

if it does not down shift you have a trans problem.

 

[JUST4FUN]

1 up on the trans

 

[toms89]

I had similar issue with my original "break-in" tune. It would not downshift under load. Drove me crazy!! It was cured as the tune was modified.

Now I understand your situation is completely different. But it does present the possibility that in may indirectly tune related via a misc bad sensor somewhere...either giving inaccurate load readings, speed reading, trans pressure readings.. etc...

Any more details on how it began. Was it progressive in nature or sudden? Did it follow any work recently performed on expy? Does it shift out of overdrive if you manually turn it off? Is it just overdrive or all gears?

 

[Blwnl36]

Thanks for all the responses. I changed the cop and plugs and its all gone! Trans is fine. Going in for a service in a week. Thanks again!

 

[toms89]

I would say COP! Check to see if any of them are cracked on the top and replace any that are!

Thanks for all the responses. I changed the cop and plugs and its all gone! Trans is fine. Going in for a service in a week. Thanks again!

rburch for the win!

 

[Blwnl36]

Thanks again.