Technical Bulletin Listing 2010
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1 Technical Bulletin Listing 2010 January, 2010 Transmission Bulletin # # Pages Subject January Allison LCT Sets P0872, No 4th, 3rd Gear Start 4L80E Shift Shuttle/No Line Rise RE4F04A Chirp Noise During 2-3 Shift 6T70/ No Reverse/Check Engine On with DTC P0776 & P0842 ZF4HP22/ No Movement Torqshift/5R110W Solenoid ID and Interchange ATRA Page 1 of 1
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3 Transmission: Subject: Application: Issue Date: Technical Bulletin # 1300 Allison LCT 1000 Sets P0872, No 4th, 3rd Gear Start Chevrolet & GMC January, 2010 Allison LCT 1000 Sets P0872, No 4th, 3rd Gear Start Some Chevrolet and GMC vehicles with the Allison LCT 1000 transmission may experience a P0872 code before or after overhaul. The driver may also report having a third gear start or a neutral shift into fourth gear. These symptoms maybe caused by a faulty solenoid, stuck E solenoid shift valve, electrical circuits or a pressure switch. To isolate the concern, test the pressure switch operation. Connect a scan tool, turn the ignition key on and engine off. Make sure all 4 switches display the correct state (see the chart below). Block the wheels. Start the engine. Move the transmission selector to neutral. If the transmission pulls while in neutral, remove valve body and check valves or solenoids. With the transmission in neutral, each pressure switch should now be in the opposite state from when only the ignition key was on. Perform a wiggle test to ensure the wiring and harness is good. Repair the wiring or pressure switch assembly if any problems are noted. If the pressure switch operation is correct, the most likely cause of a P0872 code will be a sticky E solenoid shift valve or a faulty shift solenoid. To prevent the P0872 code from setting, observe the following: - Make sure the valve body is flat. - Torque the valve body bolts evenly to Inch lbs. - Shift solenoids C, D and E can be swapped to see if the concerns changes. - The spin-on fluid filter and magnet must be in good condition. - The correct fluid and fluid level must be verified. - The E solenoid shift valve bore in the valve body should be inspected for any burrs, wear spots, damage. Sonnax has a bore sizing tool BST available to smooth down some irregular casting marks. Pressure Switch Manifold Logic Selector PS1 PS2 PS3 PS4 P/N Key ON Open Open Open Closed P/N Engine Running Closed Closed Closed Open DS Page 1 of 1
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5 Transmission: Subject: Application: Issue Date: Technical Bulletin # L80E Shift Shuttle / No Line Rise All Years w/ 6.5L Diesel Engines January, L80E Shift Shuttle / No Line Rise Chevrolet trucks with a 6.5L diesel engine and 4L80E transmission. Intermittent complaint of a hard start condition, no codes stored. Along with a transmission complaint of a 2-3, 3-2 and a 3-4, 4-3 shift shuttle at 25% throttle or higher. Scan tool data reveals the shuttle shift being commanded by the PCM. Accelerator Pedal Position sensor (APPS) and/or Throttle Position sensor signal checked and no problems found. A failing alternator causing too much electro magnetic interference (EMI also known as AC ripple) can also cause this shift shuttle complaint. Unbolting the battery feed wire to the alternator as a quick test to eliminate it being the cause. Poor grounds will cause EMI interference with no alternator fault, disconnect and clean the battery terminals. Unbolt and clean the battery ground cable(s) on the engine block as well (both batteries and grounds on diesel engines). This procedure should be done before replacing the alternator. MS Page 1 of 4
6 Technical Bulletin #1301 This same symptom can be caused by a bad Pump Cam Optical/Fuel Temperature sensor mounted on top of the Injection Pump (figure 1). According to GM the Injection Pump Cam signal is an optical sensor that receives a 5 volt reference signal that allows the PCM to measure fuel injector pulse ring RPM and position. The PCM uses this signal to control fuel injection timing and start of injection. The PCM compares this signal with the Crankshaft Position (CKP) sensor (figure 2) for diagnostic purposes. The Fuel Temperature sensor works like an Intake Air Temperature (IAT) sensor to control fuel volume. MS Page 2 of 4
7 Technical Bulletin #1301 A quick test to diagnose a shift shuttle symptom caused by this sensor would be to disconnect it. The vehicle will be difficult to start but once its running if the symptom no longer exists, replace the sensor. The Optical/ Fuel Temperature sensor is integral to the Injector Pump. A complaint of no line rise only when the wheels are turning. During a stall pressure (brake torque) test the line rise results are perfect. As soon as the wheels begin to turn approximately 5 to 7 mph line pressure no longer rises above 60 psi (base line). This problem may caused by a bad Solenoid Driver Module (figure 3) located on the side of the Injector Pump. Electronic signals from the Accelerator Pedal Position (APP) sensor, Temperature sensor, Pump Cam sensor (Optical/Fuel Temperature) and Crankshaft position sensor are received by the PCM. These signals are used by the PCM to control fuel flow through the Fuel Solenoid and Fuel Solenoid Driver. This problem may occur after a new Fuel Solenoid Driver was installed. There may not be any noticeable drivability issues with the way the engine operates. The location of Fuel Injector Pump assembly (figure 4) along with the sensors and module are in an area subject to extreme heat. The Solenoid Driver Module is available through the aftermarket with a pigtail harness to relocate it to the firewall. There are no quick tests to diagnose this sensor; the Closure Signal must be monitored with an oscilloscope (figure 5) for an erratic signal. MS Page 3 of 4
8 Technical Bulletin #1301 MS Page 4 of 4
9 Transmission: Subject: Application: Issue Date: Technical Bulletin # 1302 RE4F04A/B Chirp Noise During 2-3 Shift Nissan Quest & Altima January, 2010 RE4F04A/B Chirp Noise During 2-3 Shift While working on a Nissan Quest or Altima with a RE4F04A/B transmission, you may experience a chirp type noise coming from the transmission during the 2-3 shift at light throttle. Nissan Motor Co. has determined that this chirp noise may be coming from the high clutch assembly. Nissan Motor Co. recommends adding two (200cc each) bottles of Automatic Transmission Fluid Treatment to the transmission fluid to correct this problem. Nissan s ATF treatment part number is X61 and is available from your local Nissan dealership parts department. DESCRIPTION PART # QUANTITY ATF Treatment X61 2 PH Page 1 of 1
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11 Transmission: Subject: Application: Issue Date: Technical Bulletin # T70/75 No Reverse/Check Engine On with DTC P0776 & P0842 GM January, T70/75 No Reverse/Check Engine On with DTC P0776 & P0842 Cause: This condition may be caused by a broken 3-5 R clutch wave plate allowing the apply piston to overstroke, causing the piston to leak and loss of apply. This normally will not occur before approximately 20,000 mi. Correction: It is recommended that a new updated plate (part# ) be installed anytime the transmission is disassembled for any reason. MB Page 1 of 1
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13 Transmission: Subject: Application: Issue Date: Technical Bulletin # 1304 ZF4HP22/24 No Movement 1995-On Land Rover Range Rover January, 2010 ZF4HP22/24 No Movement Range Rover s have a 4 Wheel Tow option that allows the vehicle to be towed with all four wheels on the ground without damaging the transmission. This feature is achieved by installing a fuse that forces the transfer case to neutral. When the fuse is installed, the message center will read Transfer Neutral. The following figures show the fuse s location. JR Page 1 of 2
14 Technical Bulletin #1304 JR Page 2 of 2
15 Transmission: Subject: Application: Issue Date: Technical Bulletin # 1305 Torqshift/5R110W Solenoid ID and Interchange On Ford HD Trucks January, 2010 Torqshift/5R110W Solenoid ID and Interchange Use the following figures to indentify Torqshift/5R110W solenoid locations. If you suspect a problem with a solenoid, some of the solenoids are interchangeable with one another which can aid in diagnosis. Example: If swapping solenoids moves a problem to another gear, or a different code sets, then the solenoid is at fault. If the problem or code stays the same, then the solenoid is not the issue. Solenoids SSPC-A, SSPC-C and SSPC-E solenoids can be swapped with one another. Those solenoids are marked with a square in the figure. They cannot be swapped with any other solenoids. Solenoids SSPC-B and SSPC-D can be swapped with one another. Those solenoids are marked with a circle in the figure. They cannot be swapped with any other solenoids. The PCA and TCC solenoids cannot be swapped with one another or any other solenoids. JR> Page 1 of 2
16 Technical Bulletin # 1305 JR> Page 2 of 2
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