Allison 6sp: Auto Range Select Switch?

[Mike L.]

I ordered the Manifold Pressure Switch for the 2000 and up. Of course it was the wrong one. Mine has 4 o-rings, the one I got had 6 I think. Anyone know the correct GM part number for my 2006?

You probably have the right one. If the harness snaps in don't worry about the extra holes, they are not used anyway.

 

[klanders]

That is unfortunate as I already sent it back. I attached a picture showing both switches, mine being the left one.

 

[Mike L.]

That is unfortunate as I already sent it back. I attached a picture showing both switches, mine being the left one.

The Allison shares that switch with the 4T45E front drive trans; hence the extra holes that are not needed in the Ally.

 

[klanders]

I just put an ohm meter to it and the upper left perssure pad ( as pictured) is normally closed and opens when I push on the copper insert. The other three are normally open and close when pressure is applied. Would this indicate the switch is okay? Do you think it's time for me to put it back together and take it to the dealer?