Strange problem with my 4l60E. Started up the truck this morning, at idle while in park i here this whine comming from under the hood. First thing i thought was the blower. Well its not the blower. The whine is comming from the trans. As soon as i put into gear it stops. Also reverse is a little grabby at times. Other than those 2 things the truck is running great. What do you guys think?

 

have you changed the fluid and filter lately?

 

Someone else had a similar problem, thought it was the tranny whining, but it turned out to be one of the PCV hoses on the engine that had come undone.

 

not lately, but the tranny was built just over a year ago and it was done then.