Allison transmission nsbu switch

Expertly Engineered For Product Reliability. The vehicle is equipped with a column type shift selector. Allison Spd - Shift Range Inhibited - Chevy and. This position is communicated to the TCM so that certain vehicle control functions can be coordinated with the position of the shift controls.

Again, see the pics below for the white foam rear shield on the backside of the switch. I sat and ran the engine at 5RPM for about minutes with the AT in neutral, and the transmission then would shift into any gear. L Duramax (usually - please verify part number).

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There are receptacles on the NSBU. The pin gives the TCM information regarding the gear selecte while the pin accesses switches used for P-N starter lockout and back-up lights. If the PNP switch does not provide the proper voltage signal to the module indicating the transmission is in either Park or Neutral, the module will not allow the starter operation.

PRNDL display may not show up or flash. Delayed or No Engagement of the transmission. Let me say that as a whole this transmission is the best put out by Allison. Since they hit the market we have replaced very few of these transmissions.

However thier are some electrical issues as the previous member states. The metal clip (neutral assurance bracket) on the switch helps to ensure the switch is properly aligned to the shaft. ALLISON IDENTIFICATION TAG. Or you took out the trans at 18k?

NSBU switch on shift lever. Recently added item(s) × You have no items in your shopping cart. WE ARE NOT JUST CONNECTOR KITS, WE. Mitchell Transmission information is available in the full.

P C Industries supplies both Genuine and OEM Replacement parts for Alison products.

We utilize the same numbering system as Alison. OEM is the abbreviation for Original Equipment Manufacturer. My truck required a new one, just as bluenote outlined. The early problem was corrosion from a poor weather seal boot.

In conditions like that you should probably change the external red spin-on filter every ~0miles or less. Two other people in shop with same problem at same time. Dealer service writer and other mechanics state problem is very common and part should be recalled.

I forgot to mention, when changing out nsbu switch , the bigger plug had a lot of what looked like transmission fluid inside plug when I pulled it out. I dried it off before installing new nsbu switch. What I had been led to believe was a full Transgo kit my original transmission was not, as the boost valve was stock and had worn a ridge on the end that was hanging up, causing my problems.

He also found problems with fit and wear in the clutch plates. If it is the ECU, they can get expensive. DISCONNECT THE SHIFT CABLE FROM THE MANUAL LEVER AT THE TRANSMISSION.

REMOVE THE SIX COUPLING FROM THE FLYWHEEL ATTACHING BOLTS. Turn the flywheel manually to match the attaching bolt to the slot on the inspection. I could not figure out how to lock the back connector.

I did drive the truck, and it shifted fine, had reverse, and thought I had the problem solved. As far as the harness, Howell. The adjustment of the nsbu switch is critical, but normally if it will start in park or neutral its pretty Damn close, the psm is a pressure switch manifold located on the valve body, you will see it as soon as u drop the pan, if I ever have a valve body problem especially stuck valves the psm gets replaced as well cheap insurance, its pretty. Here is a wonderful photo for allison transmission reverse light switch.

We have been hunting for this picture through on -line and it originate from trustworthy source. Service Parts Catalog Contents PageSet 6. The neutral safety switch for an automatic transmission is located inside the transmission case or in the linkage that allows the vehicle to shift gears. This switch prevents you from starting the engine when the transmission is in any gear other than Park or Neutral. Next turn ON Ignition switch and insert test leads to and 26. If the switch is corroded it is likley confusing your transmission.

Unfortunatly you cannot repair the bad switch , it needs to be replaced. Correct installation of sealrings when overhauling an. MT(B) 6Series Transmissions.

You will have absolute control over your transmission. Ford has been running the ISB 5. Pressure switch E, usualy means a stuck E shift valve. I have a fleet of valved 5.