Update to shuddering Transmission

[Scottspence]

Originally Posted by Skip426

Scott more info in case you don't already have it.

Great book,

I only looked at the first code, which was D16340 which says " service break status input, failed on" Any idea? I will also check to see how many other codes are behind it.

[Skip426]

Visit the Allison web site and prowl around , may be a further break down of the codes there.
Allison Transmission Home

[Long Island Mac]

2013 ambassador 40'. Have had "chugging" between 3rd to 4th and 4th to 5th. Yesterday Allison checked computer, and there was a software update that was installed. Other owners have said this fixed "chugging". Will find out when we leave this Thursday.

[Scottspence]

Originally Posted by Long Island Mac

2013 ambassador 40'. Have had "chugging" between 3rd to 4th and 4th to 5th. Yesterday Allison checked computer, and there was a software update that was installed. Other owners have said this fixed "chugging". Will find out when we leave this Thursday.

Love to hear your results...that is very similar to my issues, lower gears are fine...I am getting a re-occurring code in the diagnostic; " service brakes status input, failed on". I cant seem to get an English answer what this means. I have noticed there seems to be a 3-4 second delay from the time i release the park brake to the time the spring brakes are actually released...maybe an air relay is on its way out??