Trying that tomorrow as it is a 50 part.
Allison transmission neutral safety switch problems.
It is part number 29540479.
If so what problems was your transmission giving you before you replaced the switch.
Has anyone here had to have their park neutral safety switch replaced on their allison transmission.
If the d doesn t light up on your gear indicator this could be the issue.
Here the culprit is often the neutral safety backup switch.
I suspect neutral safety backup switch as they do get crudded up and i haven t put back my fenderwells since other work.
Input speed sensor provides the tcm with a signal to measure the rotating speed of the turbine shaft from which it can calculate transmission rpm and slip.
This switch is the dual plug style that can be found on any 01 05 lb7 or lly.
One of the most common problems with the allison transmission is failure of the neutral safety back up switch.
I have found a tsb 02 07 30 011c that seems to cover my problems.
Neutral safety backup switch or park neutral position switch provide the tcm with signals to indicate selected gear range.
You should understand there is a problem if you cannot see the d light up on your gear indicator.
It is part number 29540479.
After jumping across the solenoid and getting the engine started the bus had both forward and reverse movement.
I have a p n 29541852 1 connector.
When i arrived at the bus it would not start due to a suspected neutral safety switch issue.
Our school has a 2007 ih bus with dt466 and 2500pts allison trans.
I am currently having some problems with mine including diagnostic codes p1711 and p1713.
It developed a problem on route yesterday and would no longer drive the bus.
Descriptionone of the most common problems with the allison transmission is failure of the neutral safety back up switch.
The purpose of the neutral safety switch is to prevent the car from starting while in gear which would cause it to launch forward unexpectedly.
Allison transmission 29540479 nsbu switch kit 2001 2005 lb7 lly 5 speed 2 plug.
Neutral safety backup switch issues are another common allison transmission problem on the gm duramax versions.
