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Description
Merchant Automotive 10499 Allison NSBU Switch with Connector Repair Kit 01-04 6.6L GM Duramax LB7One 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
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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★★★★★ 3
Mostly works, but..........
I use these at night for sleeping with a CPAP. I am a mouth breather, so my CPAP mask is a full face mask, thus there is constant airflow going into my mouth all night long. While these tablets do help with reducing dry mouth, they only last about 4-5 hrs before they fully dissolve - which does not get me through a full night of sleep. Using two tablets instead of one only gives me roughly one additional hour. If you wear a CPAP mask, you also need to be careful of exactly where you place the tablets, because it will be quite uncomfortable if you mask ends up pressing on the tablet. If the tablet does not adhere well upon initial placement, you pretty much need to fully dry the tablet before re-attempting placement. If the brown side is already wet when you place it against your gums, there is a much higher chance of it just sliding off, instead of sticking. Overall, while not completely eliminating the issue, they do at least reduce the dry mouth problem during sleep.
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Reviewed in the United States on January 21, 2025
★★★★★ 5
Stays put and dissolves slowly. Orange flavor is nice.
If you have to use something overnight for dry mouth definitely get these. I use one nightly with my mouth guard. The orange flavor is very nice and it dissolves slowly overnight. It's small enough to do the trick, but not be overpowering. It stays put. And it works. Definitely notice the improvement inside my mouth.
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Reviewed in the United States on November 13, 2025
★★★★★ 5
Great content
Format: Paperback
Our group is finishing up this study. I have enjoyed the discussion questions and the notes that accompany the scripture readings
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Reviewed in the United States on November 16, 2024
★★★★★ 4
Four Stars
Format: Paperback
Great condition
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Reviewed in the United States on June 28, 2017
★★★★★ 4
Some of the questions are hard to answer. This ...
Format: Paperback
Some of the questions are hard to answer. This book is written more for the Christian who has not been saved for very long.
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Reviewed in the United States on September 11, 2014