SKU #: MA-10499 MPN #: 10499

Merchant Automotive 10499 Allison NSBU Switch with Connector Repair Kit 01-04 6.6L GM Duramax LB7

Name: Merchant Automotive 10499 Allison NSBU Switch with Connector Repair Kit 01-04 6.6L GM Duramax LB7
Brand: Merchant Automotive
Price: 349.95 USD
Availability: InStock

$349.95

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Merchant Automotive 10499 Allison NSBU Switch with Connector Repair Kit for 01-04 6.6L GM Duramax LB7

Description

One of the most common problems with the Allison transmission is failure of the Neutral Safety Back Up switch.SYMPTOMS: No start condition Gear shift indicator on dash not following properly Trans stuck in limp mode or fail safe DTC's set indicating pressure switch codes How does it work and why does it cause my transmission not to shift? The vehicle is equipped with a column type shift selector. In addition to the column shifter, another component associated with the shift selector is the Neutral Safety Back Up (NSBU) switch mounted on the selector shaft of the transmission. The NSBU switch transmits selector position information to the TCM. The NSBU switch mounts directly onto the transmission housing, from the outside, and detects the angular position of the shift selector shaft. This position is communicated to the TCM so that certain vehicle control functions can be coordinated with the position of the shift controls. The neutral signal output of the NSBU switch is typically used as confirmation that the transmission is in NEUTRAL or PARK before the engine starter is engaged. The reason that PSM codes may set is that the NSBU switch and the internal PSM switch "look at each other" and "compare readings" Basically, the NSBU switch lets the TCM know what gear position that you, the driver, have selected. The PSM has the job of telling the TCM what gear the transmission is in based on hydraulic inputs. If the data received from the PSM and the NSBU do not agree, the above mentioned trouble codes may set. The NSBU is subject to water contamination and will allow the switch to give faulty readings.

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One of the most common problems with the Allison transmission is failure of the Neutral Safety Back Up switch.

SYMPTOMS:

No start condition
Gear shift indicator on dash not following properly
Trans stuck in limp mode or fail safe
DTC's set indicating pressure switch codes

How does it work and why does it cause my transmission not to shift?
The vehicle is equipped with a column type shift selector. In addition to the column shifter, another component associated with the shift selector is the Neutral Safety Back Up (NSBU) switch mounted on the selector shaft of the transmission. The NSBU switch transmits selector position information to the TCM. The NSBU switch mounts directly onto the transmission housing, from the outside, and detects the angular position of the shift selector shaft. This position is communicated to the TCM so that certain vehicle control functions can be coordinated with the position of the shift controls. The neutral signal output of the NSBU switch is typically used as confirmation that the transmission is in NEUTRAL or PARK before the engine starter is engaged.

The reason that PSM codes may set is that the NSBU switch and the internal PSM switch "look at each other" and "compare readings" Basically, the NSBU switch lets the TCM know what gear position that you, the driver, have selected. The PSM has the job of telling the TCM what gear the transmission is in based on hydraulic inputs. If the data received from the PSM and the NSBU do not agree, the above mentioned trouble codes may set. The NSBU is subject to water contamination and will allow the switch to give faulty readings.

Vehicle Fitment

2001-2004 6.6L GM Duramax LB7

WARNING: Cancer & Reproductive Harm - P65Warnings.ca.gov

Common trouble codes associated with NSBU failure include :

DTC P0708, Neutral start/backup (PNP or NSBU) switch
DTC P0847, Pressure Switch Manifold (PSM)
DTC P0872, Pressure Switch Manifold (PSM)
DTC P0875, Pressure Switch Manifold (PSM)
DTC P1711, Pressure Switch Manifold (PSM)
DTC P1713, Pressure Switch Manifold (PSM)
DTC U1000, Serial Data Communications
Blank PRNDL Display
Flashing PRNDL Display
Slow or No Engagement of Automatic Transmission

About Merchant Automotive

Merchant Automotive, LLC was founded in 2004 by Eric Merchant. Eric was a long time employee of GM dealerships before forming Merchant Automotive, LLC. Eric got his start in high school where he discovered his passion for anything with a motor. He took his passion and turned it into a career in 1993 working in a small shop doing brakes and alignment work. He accumulated knowledge daily and soon took a position at a GM dealership in 1995 and advanced up the ranks over the next 10 years. Along the way, Eric studied the business hard, taking over 3000 hours of GM training and maintaining ASE Master Certification since 1998.

In April 2008, Merchant Automotive moved into its current location in Zeeland, MI. The move was a huge undertaking that involved a complete remodel of the building. That building, having over 10,000 sq ft of space, has allowed for greater expansion and a large retail front.

Merchant Automotive staffs only professionals who have an intimate knowledge in all the Duramax/Allison platforms and are dedicated to 100% customer satisfaction. Merchant provides you with highly specific technical information not found anywhere else, and many of their products are custom designed and manufactured in-house to maximize the performance and reliability of your truck. The emphasis on product design and specialized manufacturing means that MA can offer you low pricing on products not found at other companies.