2. gather the following tools: 13mm deepwall 6 pt socket. 15mm 6pt wrench (mine's the "gear wrench" variety) 6 inch extension. 3/8" ratchet. small file. beer. 2. put the transmission in neutral. 3. disconnect NSBU wiring harness (2 in my case - I have a 2003 LB7...LLY only has 1 electrical connection).The transmission range sensor, also called a neutral safety switch, is a device responsible for monitoring the position of your gear shifter and sends this information to your vehicle’s powertrain …Mar 1, 2020 ... The allison transmission in my duramax has a ... 4 Signs of a Bad Neutral Safety Switch | Transmission Range Sensor ... Duramax Allison Transmission ...Transmission neutral start relay. I previously posted about intermittent engine starting problems. I finally tracked the problem down to the neutral start relay which is intended to prevent starting if the transmission is not in neutral. The relay is good, but it is receiving a pulsing signal from the transmission which will not allow the relay ...It should be located on the side of the Allison. The newer ones are more weatherproof than the original ones were. I know Bud had a few issues with the same NSB switch. Some info from Merchants site: One of the most common problems with the Allison transmission is failure of the Neutral Start Back Up switch.Aug 11, 2016 · Go under the vehicle and locate the neutral safety switch. Step 4: Remove the shifter linkage attached to the shifter on the transmission. This linkage may be installed with a bolt and lock nut or with a boss pin and cotter pin. Step 5: Remove the mounting bolts to the neutral safety switch. Step 6: Unplug the harness to the neutral safety ... Aug 11, 2016 · Go under the vehicle and locate the neutral safety switch. Step 4: Remove the shifter linkage attached to the shifter on the transmission. This linkage may be installed with a bolt and lock nut or with a boss pin and cotter pin. Step 5: Remove the mounting bolts to the neutral safety switch. Step 6: Unplug the harness to the neutral safety ... Front support. Rear support. Here is the switch on the side of the gearbox, tight access. Releasing the switch from the shaft with a 10mm socket. Releasing the bottom fixing bolt 8mm. Releasing the top bolt 8mm. Once the bolts were off, the switch could be levered off and the connector was released.Allison Transmission service outlet for the currently applicable publication. Additional copies of this publication ... that neither personal safety nor equipment safety will be …04/24/2024. To locate the neutral safety switch, first, find it on top of the transmission, driver’s side, with three wires connected. It governs starter grounding and backup lights. For modern automatics, it’s near the transmission or steering column, using a position sensor. In manual transmissions, it sits close to the clutch linkage.The Allison 29542692 NSBU (Neutral Start Back Up) Switch is an OE replacement for your 2006-2016 GM 6.6L Duramax. Ideal for maintaining a factory ride, this part has a stock fit and finish. Made to stock specifications, this product is constructed from quality materials. Features: Factory Fit & Finish; Made to Stringent Specificationstechnologies such as cybersecurity and functional safety (ISO 26262) . ... Transmission is in N (NEUTRAL) . • Output speed ... Turn off the vehicle engine ignition ...Location Salem, IN Transmission Automatic Oct 15, 2008 #2 I don't believe the auto ativ transmissions where equiped with an external neutral safety switch; I think it was all done via gear position and the PCM. ... It is more than just a neutral safety switch, it also powers the reverse lights, and is sometimes called a PRNDL swtich. You must ...The neutral safety back up, or NSBU switch) is another component that is associated with the column shifter, only it is mounted on the selector shaft of the transmission. Mounting directly on the transmission housing from the outside, the NSBU switch detects the angular position of the shift selector shaft.Aug 9, 2010 · allison at545 wiring. I was doing some research on the 545 since I just got one. The one I have only has 2 wires for a neutral saftey switch. It shifts with a cable like any old school trans. there`s only 2 wires on a 545 trans. they are for the starter neutral circuit. one wire goes to the starter switch and the other goes to the starter ... neutral safety switch. Ally 6Spd: ... Transmission range switch fault code p0708 . ... Mid year 03- 05 rarely gave trouble, and once the earlier trucks were upgraded to the genuine ALLISON switch, they don't give much trouble either. 1995 K2500 SUBURBAN, LB7 DURAMAX/ALISON powered.The Neutral Start Back up Switch Assembly is a position indicator switch for the transmission control module to reference the shift selector. The switch ...A new neutral safety switch, if this is the problem, is very inexpensive to replace and will be a lot safer. If for some reason you bypassed it and left the car in drive or reverse, the car could start and take off on you without warning. So while it is possible to do this bypass, this could be dangerous and not worth the safety hazard. Pontiac.To ensure an accurate check, operate the transmission until the sump fluid temperature is 160–200°F (71–93°C) or converter-out temperature is 180–220°F (82–104°C). Park the vehicle on a level surface and shift to N (Neutral). Set the parking brake and/or emergency brakes and chock the vehicle wheels.The neutral safety switch on a John Deere Gator is typically located on the transmission or the gearshift lever. It is designed to prevent the vehicle from starting unless it is in neutral or park. The exact location of the switch may vary depending on the specific model and year of the Gator. It is advisable to consult the owner’s manual or ...Step 2: Locate the transmission position sensor. Grab a creeper, flashlight, and tools for the job. Go under the vehicle and locate the transmission position sensor (switch). Step 3: Remove the harness from the sensor. If you have a mechanical shifter, you will need to remove the linkage from the transmission. The Allison 29542692 NSBU (Neutral Start Back Up) Switch is an OE replacement for your 2006-2016 GM 6.6L Duramax. Ideal for maintaining a factory ride, this part has a stock fit and finish. Made to stock specifications, this product is constructed from quality materials. Features: Factory Fit & Finish; Made to Stringent Specifications Allison Transmission (NYSE: ALSN) is a leading designer and manufacturer of vehicle propulsion solutions for commercial and defense vehicles, the largest global manufacturer of medium- and heavy-duty fully automatic transmissions, and a leader in electrified propulsion systems that Improve the Way the World Works.Q1: What is a neutral safety switch? Answer: A neutral safety switch, also known as a range sensor or gear position sensor, is an essential component found in most automatic transmission vehicles. This switch is designed to prevent the engine from starting or unintentionally shifting gears unless the vehicle is in a neutral (or park) position.How to test an inhibitor switch or neutral safety switch. You'll need a digital multi-meter that's able to test continuity. (Most multi-meters have this func...If you’re in need of transmission repair or maintenance services, finding a reliable and trustworthy provider is crucial. AAMCO is a well-known and respected brand in the automotiv...The neutral safety switch often has the backup lamp incorporated in its design. The Transmission Range Sensor is part of the transmission computer control system found on late-model vehicles. It can be analog or digital. Both of these are diagnosed with a scan tool. Where is the neutral safety switch located on Allison transmission? This switch ...Automatic Mode (AUTO) In automatic drive mode (AUTO), upshifts and downshifts are made by the UltraShift PLUS without driver intervention. Press in the neutral lock button, move the selector switch to Drive (D), and press down on the throttle pedal. The transmission will shift automatically.Honda Genuine OEM Acura 28900-RYF-023 Neutral Safety Switch Trans Range Sensor. $73.40. Trending at $85.33. Find many great new & used options and get the best deals for Allison Transmission Neutral Safety Switch Assembly 29511978 Eaton NOS at the best online prices at eBay! Free shipping for many products!Removing and cleaning the Neutral Start Switch. Removing and cleaning the Neutral Start Switch or Neutral Safety switch. I suggest before you start this project you have these things on hand: Dielectric or boot grease, Electronic parts cleaner, Cleaning pics, paper towels, and of course tools. WARNING: Block your rear tires and …May 13, 2023 · There are two different shift mechanisms available on the 2500 Allison , and the 2500 series has under gone many changes over the years . I believe your 2500 will be a Gen IV , with internal neutral safety and back up switches . As opposed to the Gen III that used and external NSBU ( Neutral Start Back Up ) switch. Gerald. 2014 Toyota Tundra SR5. Finally was able to remove Neutral Safety Switch. The threads on the nut to transmission clamp down around selector that sticks out of transmission. You have to pry the slots of the switch to open them up enough to slide over the threads. Fixed my issue, P0705, money light (check engine).Neutral Safety Switch Location How Do You Find The. The Complete Allison 1000 2000 2400 Info And Swap Guide Thread Mins 4bt Sel Conversions Forums. Get The Most From Your 2001 2005 Allison By Converting It To A 6 Sd Sel Power Products Blog. I Am Working On A 2005 Chevy C4500 Duramax Needs The Engine Wiring …STEVE W. It is part of the transmission range switch. If you have the common transmission it is mounted on the outside of the transmission over the manual selector shaft as shown in the first picture. If you have the heavy duty truck with the optional Allison transmission it is inside the transmission and the selector shaft goes through …The total estimated cost to replace a neutral safety switch is around $100 to $150, including parts and labor. A new part typically costs about $50, while the labor costs usually range from about $50 to $150. Labor costs can vary depending on where the safety neutral switch is located on your vehicle, the experience level of the mechanic, …Series. 2400. Series. Each transmission is identified by a model designation, group numbers, and serial number. This information is included on the transmission identification tag located on the right rear side of the transmission case, as shown in Figure 3. Heavy-duty automatic transmission with parking pawl.Front support. Rear support. Here is the switch on the side of the gearbox, tight access. Releasing the switch from the shaft with a 10mm socket. Releasing the bottom fixing bolt 8mm. Releasing the top bolt 8mm. Once the bolts were off, the switch could be levered off and the connector was released.Allison 1000 6-Speed NSBU Switch | 2006 - 2019 Fits: 2006-2019 Duramax HD Part# 29542692. GM neutral safety switch for 2006-2019 Allison 1000 transmission.Typical problems of an Allison transmission include abnormal shifts, abnormal stall check speeds, slipping of the clutch and abnormal responses. Abnormal shifts in an Allison trans...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 ...Locate the Transmission Control Module (TCM): In the 4000 series, the reverse light switch is often located near the Transmission Control Module. Look for a box-like component with multiple electrical connectors. Inspect the Switch: Once you’ve located the switch, inspect it for any signs of wear, corrosion, or damage.Yes, you can bypass the neutral safety switch. You will need to connect the purple wire with the other purple wire that has a white line on it. It is advised to only do this when testing the neutral safety switch. Cost of Repair and Replacement of Neutral Safety Switch. Generally, a replacement for a neutral safety switch will cost about $50.I need help troubleshooting a 2005 international 4300 dt 466 that blows a 5 amp ignition fuse when key is turned off. The truck will not shut off … read more. Daniel Wilson. Associate Degree. 7,141 satisfied customers. 2005 …The 09+ 4L60E IMS comes with an integrated rooster comb, new roll pin and selector shaft seal. Unplug, punch out the existing roll pin, remove selector shaft and existing switch assembly. Reinstall in opposite order of removal. Please provide your first name, vehicle year and transmission if sending me a PM-thanks! A new neutral safety switch, if this is the problem, is very inexpensive to replace and will be a lot safer. If for some reason you bypassed it and left the car in drive or reverse, the car could start and take off on you without warning. So while it is possible to do this bypass, this could be dangerous and not worth the safety hazard. Pontiac. 1.) Starter is brand new (I put a new one in thinking initially, that it was the cause.). Pos (e-motor), Pos (solenoid) and Neg leads excellent contact. 2.) I understand that there is a neutral safety switch located under the dash attached to the steering column (however, when I look under there I have no idea which wires go to what). 3.)2. gather the following tools: 13mm deepwall 6 pt socket. 15mm 6pt wrench (mine's the "gear wrench" variety) 6 inch extension. 3/8" ratchet. small file. beer. 2. put the transmission in neutral. 3. disconnect NSBU wiring harness (2 in my case - I have a 2003 LB7...LLY only has 1 electrical connection).Fuller® Speed Sensor Kit (K4148) 0. $45.21. Standard® Automatic Transmission Connector (S-1605) 0. $57.93. Standard® Automatic Transmission Output Shaft Speed Sensor (SC314) 0. $143.29.To put an automatic transmission vehicle into neutral when the battery is drained, apply the parking brake, turn on the ignition switch, depress the brake pedal and then move the g...The NSBU switch is on the inside of the 6-speed Allison transmissions.Aug 11, 2016 ... The switch is located in two places on the vehicle. Column shifters have the neutral safety switch located on the of the transmission.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. Allison part number: 29542692. Details. SKU: 29542692 - 15C. Stock #: …1025R SCUT (2014 Model Year) H120 FEL, 260 Backhoe, 54D MMM, 54 Snow Blower, 54 Front Blade, JD I-match, 10P Dump Cart. Various tractor bling from: Heavy Hitch, Ken's Bolt-On Grab Hooks, Everything Attachments, Bxpanded, Artillian, Miller Tire, Larsen Lights for Agriculture. kylew. Each neutral safety switch is a direct-fit replacement electrically operated switch that replaces damaged OE units increasing road safety and restoring neutral safety function. Copper alloy conductors ensure superior electrical conductivity with low resistive losses. Robust design and high grade materials meet the stringent demands of today's ... Deuce. Some early 70's Chevy/GMC vans with the Turbo 350 have the neutral start switch mounted ON the transmission. The case has two extended prongs cast into the left side of the case just above the shift lever. Most column shifted GM's have the neutral start/back up light switch on the column.The starter motor and ignition system are usually wired through the neutral safety switch, which is actually disconnected when the gear lever is in any one of the driving gears. If it is, the switch disconnects the wiring to the ignition system, leaving the electric current open and disconnected. This prevents electric current from flowing to ...Removing and cleaning the Neutral Start Switch. Removing and cleaning the Neutral Start Switch or Neutral Safety switch. I suggest before you start this project you have these things on hand: Dielectric or boot grease, Electronic parts cleaner, Cleaning pics, paper towels, and of course tools. WARNING: Block your rear tires and …Allison 1000 6-Speed NSBU Switch | 2006 - 2019 Fits: 2006-2019 Duramax HD Part# 29542692. GM neutral safety switch for 2006-2019 Allison 1000 transmission.jtamulonis. 720 posts · Joined 2007. #3 · Aug 9, 2010. there`s only 2 wires on a 545 trans. they are for the starter neutral circuit. one wire goes to the starter switch …In going into the 2002 parts list Fig. 42RE-210 the Neutral Safety Switch OE part number for your 02 4.0 42RE transmission is below. NSS, 3747361. NSS washer, 2403143. It's the same screw in switch type as mentioned/shown in this thread.technologies such as cybersecurity and functional safety (ISO 26262) . ... Transmission is in N (NEUTRAL) . • Output speed ... Turn off the vehicle engine ignition ...Forest River Owners Club. Join Date: Jan 2012. Location: Kentville, NS. Posts: 425. Replacing Neutral Safety Switch. My 1999 Winnebago with Ford F53 chassis has been getting hard to shift into gear as the shift lever has been getting progressively stiff. While troubleshooting the problem I discovered that the neutral safety switch on the side ...Dec 7, 2011 ... p0708 - Transmission range sensor circuit high input p0700 - Transmission control system. P0093 - Large fuel leak? Looked everywhere, no fuel ...Oct 25, 2009. #7. Yeah mate, security light goes off when I turn the key. Both key fobs lock and unlock the doors too. It's got me stumped, that's what is leading me to believe that I might have accidentally unplugged or bumped a secondary neutral safety switch either on the side or INSIDE the pan on the gearbox. I hope that's not the case though. Placeholder Product Name. Placeholder Product Name. $00.00. 0000-0000 Placeholder Application. Get a OEM replacement for the malfunctioning NSBU switch in your 2004.5-2005 GM 6.6L Duramax LLY with the Allison 29541852 NSBU (Neutral Start Back Up) Switch. Placeholder Product Name. Placeholder Product Name. $00.00. 0000-0000 Placeholder Application. Get a OEM replacement for the malfunctioning NSBU switch in your 2004.5-2005 GM 6.6L Duramax LLY with the Allison 29541852 NSBU (Neutral Start Back Up) Switch. Noted below are a few of these warning signs that should alert you to contact a local ASE certified mechanic to inspect and replace the neutral safety switch if needed. 1. Engine will not crank in park but cranks in neutral. When the driver turns the ignition switch and the automatic transmission is in park, or the manual transmission is in ...2. gather the following tools: 13mm deepwall 6 pt socket. 15mm 6pt wrench (mine's the "gear wrench" variety) 6 inch extension. 3/8" ratchet. small file. beer. 2. put the transmission in neutral. 3. disconnect NSBU wiring harness (2 in my case - I have a 2003 LB7...LLY only has 1 electrical connection).Do-it-Yourself Procedures for Replacing a Neutral Safety Switch. Time and Cost. Approximate time to complete: 1-hour Cost for Neutral Safety Switch: Low $25 High $160 Note: The cost for a neutral safety switch is normally between $30 and $60. For certain imports and other high-end late model vehicles the cost can be significantly higher.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 ...Car Truck Parts New Neutral Safety Switch Connector 7pin 4pin For Gmc Chevy 4l60e 4l80e 4l65e Accessories. Wire harness installation instructions install guide 4l80e gm automatic transmission ete reman support special for the 4stb e wiring diagram neutral safty switch 1947 present chevrolet gmc truck message board network need …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 ...The neutral safety back up, or NSBU switch) is another component that is associated with the column shifter, only it is mounted on the selector shaft of the transmission. Mounting directly on the transmission housing from the outside, the NSBU switch detects the angular position of the shift selector shaft.Neutral safety switch adjustment. Hi everyone, first post here. I've been looking for an answer to my issue and haven't come across one that fits. I'm hoping someone point me in the right direction. I just replaced the transmission in my 2000 Silverado 4x4 with a remanufactured replacement. I didn't properly remove the old …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. Allison part number: 29542692. Details. SKU: 29542692 - 15C. Stock #: …Mar 26, 2019 ... Curt explains why you might need to replace your 4l60E Neutral Safety Switch . When removing the harness you could damage the switch itself. Each neutral safety switch is a direct-fit replacement electrically operated switch that replaces damaged OE units increasing road safety and restoring neutral safety function. Copper alloy conductors ensure superior electrical conductivity with low resistive losses. Robust design and high grade materials meet the stringent demands of today's ... Honda Civic Switch Assembly, Parking Pin & Indicator Lamp. Part Number: 35740-SDA-A81. Vehicle Specific. Other Name: Neutral Safety Switch. $20.89 MSRP: $29.50. You Save: $ 8.61 ( 30%) Check the fit. Add to Cart. Fits the following Vehicles:... transmission, new Allison transmission, free Allison transmission ... neutral safety switch, linkage, and speedometer gear depending on your specific application.It has a 400Cummins ISL and 4000 Series Allsion. I have narrowed it down to an issue with the neutral saftey relay circuit which when energized then pulls in the starter lockout relay. There is no issue with the keypad and showing neutral. I can jump the starter relay and the coach runs with no issues, transmission shifts as normal.Do-it-Yourself Procedures for Replacing a Neutral Safety Switch. Time and Cost. Approximate time to complete: 1-hour Cost for Neutral Safety Switch: Low $25 High $160 Note: The cost for a neutral safety switch is normally between $30 and $60. For certain imports and other high-end late model vehicles the cost can be significantly higher.The color code on that wire is 14PPL, so believe this to be a 14gauge purple wire. On manual trans cars, the switch is activated by the clutch pedal, ie it has to be depressed to start the car. Looking at the His/Hers floor shifter, the neutral safety switch is located on the shifter itself, appears to be on the left side on the shift, inside ...Between airlines ramping up safety protocols and the Department of Defense suggesting that the risk of COVID-19 transmission onboard airplanes is virtually n... Between airlines ra...Neutral safety backup switch problems. I have an 06 Silverado with a 6 speed allison. It started shifting funny and then just quit. It was dropping a P0708 code. I bought a new NSBS and then went on the hunt to find the thing. Everyone told me that the switch was on the side of the tranny, but I found it inside.Neutral Safety Switch Location. Discussion in '1st Gen. Tacomas (1995-2004 ... Male First Name: Chris San Luis Obispo/San Jose Vehicle: 2004 Double Cab 4x4 Specs in the Build Thread. Have to replace my Neutral Safety Switch because it was throwing an engine code. ... Hayden 679 Universal 11” Rapid-Cool Add-On …The NSBU has two connectors (figure one). One connector has four pins, and the other has seven. All four pins of the first connector go directly to the TCM and tell it which range the transmission is in.Take off the left fairing to make it easier to access and remove. Use pliers to lightly pull off the wire. The metal part loosely grips around the switch part but doesn't require tools to remove. Here's the switch with the wire pulled off. continued... Use the 14 mm wrench included with the bike's toolkit to remove it.Engine Coolant Temperature(ECT) sensor (figure 6) and Transmission Fluid Temperature sensor (TFT), located in the pressure switch manifold (PSM). Neutral Safety Backup Switch(NSBU) (figure 7) or Park/Neutral Position (PNP) switch. Input Speed Sensor (ISS/TSS; figure 8). Output Speed Sensor (OSS). Transmission Fluid Pressure Switch (PSM; figure 9).
concerning Allison Transmission products. This publication is revised periodically to include improvements, new models, special tools, and procedures. A revision is indicated by a new date on the title page and in the lower left corner of the rear cover. Check with your Allison Transmission service outlet for the currently applicable publication.. Fenix parts moultrie previously ctv
Between airlines ramping up safety protocols and the Department of Defense suggesting that the risk of COVID-19 transmission onboard airplanes is virtually n... Between airlines ra...The neutral gear disengages all gears in the transmission and disconnects the transmission from the wheels, allowing the wheels to roll without using the power of the engine. It al...When an Allison 1000/2000 transmission produces a pressure-switch code, it does not necessarily mean the pressure switch is faulty. A solenoid needs to stroke a valve, which then sends oil pressure to the switch to close it. If the solenoid is performing poorly, or the valve is sticking, the pressure switch will not close, causing the …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 ...If the neutral switch was simply added in ... position doesn't necessarily mean the trans is in the exact neutral position. ... via the neutral ...Check the new switch by turning on the engine while setting the transmission in ‘park’, ‘neutral’, ‘gear’, and ‘reverse’. It should start while in ‘park’ and ‘neutral’ only. As can be seen, the neutral safety switch plays a crucial role in starting a vehicle’s engine. The replacement cost for a bad switch can be ...SOURCE: How to replace a neutral safety switch. The switch should be on the drivers side of the tranny where the shift linkage attaches to it. You will need a 13mm socket and a 15 mm socket . You will also need a heat gun , the electrical plug is glued into the connectors and must be warmed up to be removed . these rarly go bad but they do get ...Oct 9, 2019 ... 2004 gmc duramax/allison transmission. Similar with all rwd/4wd full size transmission.Select delivery location. ... SecosAutoparts 4L60E 4L80E 65E Neutral Safety Switch Pigtails Switch Connectors 7 & 4 Wire fit for GM 1995 to 2004 4-Speed Automatic Transmission 88862288 15305920 15305887 350-0077-1P 186-24229422 ... Right part for my 05 3500 duramax Allison transmission. Read more. One person …R&R park neutral switchNeutral Safety Switch / Range Sensor Connector. ... ^ Could ship from same location as parts in cart ... Allison trans. DORMAN 511102. $90.79 ...Aug 30, 2022 ... Finding a replacement backup light switch for an International Scout II can be really, really expensive. Please watch this video to find out ...Nov 29, 2011 · Verified. Hello , my name is Joe , and I will be happy to assist. From your description , it sounds like you may have a defective neutral safety - or "multi function" switch. Sometime water gets inside of the switch and causes intermittent problems like you describe. Also , inspect the harness connector for dirty or corroded pins. 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. Allison part number: 29542692. Details. SKU: 29542692 - 15C. Stock #: …A new neutral safety switch, if this is the problem, is very inexpensive to replace and will be a lot safer. If for some reason you bypassed it and left the car in drive or reverse, the car could start and take off on you without warning. So while it is possible to do this bypass, this could be dangerous and not worth the safety hazard. Pontiac.Typical problems of an Allison transmission include abnormal shifts, abnormal stall check speeds, slipping of the clutch and abnormal responses. Abnormal shifts in an Allison trans...Help. I have a 1993 Vectra with the MD3060 6-speed Allison. The key will not always start or engage the starter. I replaced the ignition switch and had a new solenoid installed on the starter and had it tested. When it doesn't start, I get no power to the solenoid. (The small wire from ignition) I believe it is the neutral safety switch.NSBU Switch Allison 1000 | 2001 - 2004. $249.93. Add to Wish List. Description. One of the most common problems with the Allison transmissions on 2001-2004 GM Duramax diesel equipped trucks is a failed NSBU switch. The NSBU is the Neutral Safety Back Up Switch and a failed switch can cause your truck not to start.If you follow all the small wires going out of the battery box area you will find the connector. It is 2-3ft down the wire. Most likely when you had the batteries changed you disturbed it and caused the problem. Without power to the Allison transmission ECU the neutral safety switch will not let it start..
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