13 speed ticking noise, only in 4th, 8th and 8th over?

Actually I can’t feel it in the shifter. It’s only under acceleration or deceleration. I just drained the fluid through a screen with some heavy magnets, and it’s as clean as can be. It’s a bit darker red than new, but no metal particles to be found. I’m really confused what’s happening. You’d think a broken tooth would have been caught by the magnet?

 

If your truck is talking to you listen , you don't want to wait for the big hook and pay alot more..

 

Then put that aside and grab your flashlight an take a peek inside where the fork rides the cluster gears..think there's an oil pump in there too

 

It's a cognitive noise so something is rubbing.. get the Eaton 13sp diagram it's on a PDF file..there's a lot more on the PDF .. it's free

 

Is the shifter tight.. no rotation .like if you were going to turn it like a door knob?

 

It will rotate a bit

 

That's nothing.. how many miles...

 

High gear is closest to the input shaft. So its possible to be a bearing. But could be a worn fork, something in the counter shaft or even a broke tooth still. No telling where the piece is. They don't always come out with the oil. Could have already been ground up and a small flake between gear teeth is your noise.


Thing is it won't get any better

 

Well it was put in 2007. That’s all I know. Guess anywhere from 500 to 800,000.

 

I’m guessing it’s nothing that could be fixed while it’s in the truck.