Ayr Queensland Australia 4807 | Sorry for a late response on this been busy on other stuff , a few things is the retaining bracket that holds the exhaust pipe steady under the hood it is welded the the cover pipe and is a rod . I had an 8400 where the weld broke and as the machine warmed up the exhaust pipe was able to move towards the windscreen eventually touching the screen causing a growl when the load went off the engine the exhaust temp reduced and the pipe moved away from the screen..
Have you drained the power-shift oil and pull the screen from it and put a magnet in there?
I see you have pulled it apart ,this is what would do ,check that pipe weld , put 4 new cab mount rubbers . Remove the trans filter and have some one cut it open with a filter tools take a few photos.
Have you drained the front axle as there is a bearing on the top input shaft that could be an issue. |
JD 8400 transmission noise & metal in filter
