[2500HD2001]

I have a '01 2500HD Ext Cab Short Bed 315/75-16 8.1L Allison


I took it in the mud over the weekend...While out there it got stuck in 3rd gear and i had a hard time getting it into reverse...


Now everything is normal when I first start it...After everything gets warmed up...engine to noraml temp and when the trans hit about 160-170 deg. the shift indicator dissapears and it get stuck in 3rd gear again no matter where i put the shifter...except N R & P but R is a pain the get into...


Can anyone help me with this ?


Thanks in advance, Artie

 

[dmaxalliTech]

nsbu switch on side of trans, gaurenteed (sp*)

 

[2500HD2001]

Do you have a suggestion as to where I should get it from ?


And also, What does NSBU stand for


Thanks, ArtieEdited by: 2500HD2001

 

[aketay]

http://dieselplace.com/forum/forum_posts.asp?TID=3279&PN=1

Try this link, Transmission Control Module. Me thinks "NSBU" stands for neutral safety back-up switch.

 

[dmaxalliTech]

arite, www.gmdieseltech.com


Nuetral Start Back Up switch


where in MI is pinckney?

 

[2500HD2001]

its 15 miles west of ann arbor


Thanks, Artie

 

[dmaxalliTech]

artie, I dont have it yet, but working on a step by step on changin one

 

[hoot]

The black unit on the right just behind the torsion bar. The newer styles are no longer black but tan. Stands for Nuetral Safety Back Up

Edited by: hoot

 

[MaineMax]

Artie


I bought one from a Detroit Diesel/Allison dealer for less than the Chevy Dealer


Good Luck