TX-8 8 Speed Transmission Operator’s Manual
Contents Safety..................................... 1 Features..................................... 2 Indications and Controls..................................... 3 Operation..................................... 4 Maintenance..................................... 5 Information.....................................
Contents © 2021 PACCAR Inc. - All Rights Reserved This manual illustrates and describes the operation of features or equipment which may be either standard or optional on this vehicle. This manual may also include a description of features and equipment which are no longer available or were not ordered on this vehicle. Please disregard any illustrations or descriptions relating to features or equipment which are not on this vehicle.
SAFETY - 1 Chapter 1 | SAFETY Using this Manual..................................................................................................................................5 Safety Alerts..........................................................................................................................................5 Illustrations............................................................................................................................................
SAFETY - Using this Manual Using this Manual Please take the time to get acquainted with your vehicle by reading this Operator’s Manual. We recommend that you read and understand this manual from beginning to end before you operate this equipment. This manual contains useful information for the safe and efficient operation of this equipment. It also provides service information, with an outline for performing safety checks and basic preventive maintenance inspections.
SAFETY - Illustrations 1 WARNING Hot engine oil can be dangerous. You could be burned. Let the engine oil cool down before changing it. Failure to comply may result in death, personal injury, equipment or property damage. Cautions The safety message following this symbol and signal word provides a caution against operating procedures that could cause equipment or property damage. The alert will identify the hazard, how to avoid it, and the probable consequence of not avoiding the hazard.
SAFETY - General Safety Instructions Before performing any repair, read and understand all of the safety precautions and warnings. The following is a list of general safety precautions that must be followed to provide personal safety. Failure to follow these instructions may cause death or injury. Special safety precautions are included in the procedures when they apply.
SAFETY - General Safety Instructions 1 • • • 8 system that contains pressure. High pressure oil or fuel can cause death or personal injury. Always wear protective clothing when working on any refrigerant lines and make sure that the workplace is well ventilated. Inhalation of fumes can cause death or personal injury. To protect the environment, liquid refrigerant systems must be properly emptied and filled using equipment that prevents the release of refrigerant gas.
SAFETY - Repairs • Coolant is toxic. If not reused, dispose of coolant in accordance with local environmental regulations. CAUTION Corrosive chemicals can damage the engine. DO NOT use corrosive chemicals on the engine. Failure to comply may result in equipment or property damage. California Proposition 65 Warning • • Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm.
SAFETY - Repairs 1 Your dealer’s service center is the best place to have your vehicle repaired. You can find dealers all over the country with the equipment and trained personnel to get you back on the road quickly—and keep you there. Your vehicle is a complex machine. Anyone attempting repairs on it needs good mechanical training and the proper tools. However, all warranty repairs must be performed by a PACCAR Powertrain distributor.
SAFETY - Repairs 1 Y53-1331 (6/21) 11
FEATURES - 2 Chapter 2 | FEATURES Auto-neutral.........................................................................................................................................13 Adaptive Driving Mode........................................................................................................................ 13 Adaptive Starting Gear........................................................................................................................13 Auto-park (option)................
FEATURES - Auto-neutral Auto-neutral The Auto-neutral feature will automatically shift the transmission into Neutral if it is left in a forward or reverse mode (such as LOW, Drive, or Reverse) and the parking brake is set. NOTE If Auto-neutral has been activated, the transmission will not shift into Drive (D) or Reverse (R) until the shifter is first moved to Neutral (N) before selecting another transmission mode.
FEATURES - Engine Overspeed and Underspeed Protection NOTE 2 If Auto-park has been activated, the transmission will not exit Park (P) until the shifter is first moved to P before selecting another transmission mode. Engine Overspeed and Underspeed Protection The transmission system will upshift, if necessary, to prevent damage during an engine overspeed condition and will also downshift to prevent engine lug (driving in a high gear at low rpm) and a potential stall during an engine underspeed condition.
FEATURES - Neutral Idle Control Plus (NIC+) Neutral Idle Control Plus (NIC+) NOTE NIC+ is only available for vehicles equipped with air brakes. This transmission will shift into neutral when the vehicle is stationary, and the service or parking brake is applied. NIC+ absolves the engine from providing power to the drivetrain when the vehicle has stopped, saving fuel and reducing the braking effort required by the operator to keep the vehicle stationary.
INDICATIONS AND CONTROLS - Chapter 3 | INDICATIONS AND CONTROLS Digital Display..................................................................................................................................... 17 3 Gearshift Lever....................................................................................................................................18 Hill Start Aid Disabled Warning Light (option).....................................................................................
INDICATIONS AND CONTROLS - Digital Display – Digital Display Transmission Gear Display Primary Gauges View Transmission Temperature 6 D N R Transmission Gear Display The Transmission Gear Display is located on the Digital Display.
INDICATIONS AND CONTROLS - Gearshift Lever transmission. Watch this gauge to know when the transmission is overheating and if so, have it checked by an authorized service representative. 3 Transmission Modes NOTE Vehicles without a Park (P) mode must be in Neutral (N) to start the engine.
INDICATIONS AND CONTROLS - Gearshift Lever • Pushing or pulling the lever will briefly upshift or downshift the transmission gear respectively (about four seconds); after which, the transmission will return to the ideal gearing for the current vehicle speed and engine use. • Pushing and holding the lever away will engage the LOW Mode (see LOW Mode Operation). When in Manual mode • Pulling the lever towards the driver will upshift (+). • Pushing the lever away will downshift (–).
INDICATIONS AND CONTROLS - Hill Start Aid Disabled Warning Light (option) transmission system will override the Manual position and perform an upshift. NOTE Hill Start Aid Disable Switch (option) Power Take-off (PTO) Switch (option) Two-position Switch Two-position Switch The transmission initiates upshifts from Manual for engine overspeed protection. 3 If the start gear is changed and it causes the engine to lug at takeoff, the transmission system will override Manual mode and perform a downshift.
INDICATIONS AND CONTROLS - Power Take-off (PTO) Switch (option) will turn off immediately even though PTO disengagement may not have occurred. CAUTION Increasing engine rpm before the PTO is actually engaged could prevent the PTO from engaging and/or cause PTO damage.
OPERATION - Chapter 4 | OPERATION How to Check Transmission Fluid.......................................................................................................23 How to Add Transmission Fluid...........................................................................................................23 How to Drain the Transmission........................................................................................................... 24 4 LOW Mode Operation.......................................
OPERATION - How to Check Transmission Fluid 4. How to Check Transmission Fluid • Clean cloth or paper towel 1. Park vehicle on level surface, engage parking brake, and start engine. Idle engine at 600 rpm to 800 rpm until transmission temperature reaches 104°F ( 40°C). 2. 5. 6. Find the red-handled transmissionfluid dipstick, located drivers-side, outward of the engine. Twist and remove dipstick, and wipe clean using towel or cloth. Reinsert dipstick fully and remove again.
OPERATION - How to Drain the Transmission • O-ring (new) NOTE Fill Location DO NOT fill past the FULL line. Oil Fill Location 4 1. 2. Remove transmission oil fill plug at Oil Fill Location. Using a funnel, add a small amount of fluid at fill location. NOTE DO NOT add fluid into dipstick housing. 3. 4. 5. 24 Find the red-handled transmissionfluid dipstick, located drivers-side, outward of the engine. Twist and remove dipstick, and wipe clean using a towel or cloth.
OPERATION - Snow/Ice Operation slippage, the driver should select Manual mode. Manual mode holds the current gear position under most operating conditionsthe transmission will only shift when the driver uses the up/downshift request. Once road conditions improve, the driver should revert back to Drive mode. Parking Pawl Manual Release Start-Up and Power Down 3. 1. Manual Release Nut Located at the midpoint, driver's side of the transmission. 1. Remove nut and washer at Parking Pawl Release (1). 2.
OPERATION - Transmission Power Take-off (PTO) (option) NOTE The engine will not start if Neutral (or Park) is not selected on the gear-shift lever. • 4 When instructed to set the transmission mode or gear, press the service brake while selecting a new transmission mode using the gear-shift lever. reflect the appropriate transmission mode: N or P. NOTE If the gear display does not show a solid N (or P), the appropriate gear has not yet been obtained.
OPERATION - Vehicle Towing Vehicle Towing When towing the vehicle, the output shaft of the transmission must not be allowed to spin or turn. If the vehicle is towed with the drive wheels still in contact with the road surface, the vehicle axle shafts or driveline must be removed or disconnected. 4 CAUTION Always follow proper manufacturer towing procedures. Failure to follow proper towing procedures could result in damage to the transmission.
MAINTENANCE - Chapter 5 | MAINTENANCE Automatic Transmission Maintenance................................................................................................ 29 What is Preventative Maintenance?....................................................................................................30 Troubleshooting...................................................................................................................................
MAINTENANCE - Automatic Transmission Maintenance Automatic Transmission Maintenance An automatic transmission is a complex and expensive vehicle component requiring operational attention and proper maintenance to ensure long-lasting performance. This performance is impacted greatly by the quality of its lubricating fluid, which reduces friction between its many parts, facilitates gear shifting, and cools down the transmission components.
MAINTENANCE - What is Preventative Maintenance? What is Preventative Maintenance? 5 Preventive maintenance begins with the daily checks. Routine vehicle checks can help avoid many large, expensive, and time consuming repairs. The vehicle will operate better, be safer, and last longer. Neglect of recommended maintenance can void your vehicle’s warranty. Some maintenance operations demand skills and equipment you may not have.
MAINTENANCE - What is Preventative Maintenance? WARNING NEVER start or let the engine run in an enclosed, unventilated area. Exhaust fumes from the engine contain carbon monoxide, a colorless and odorless gas. Carbon monoxide can be fatal if inhaled. Failure to comply may result in property damage, personal injury, or death. The following pages contain a table of maintenance tasks with the related intervals for each task on the right side of the table.
MAINTENANCE - What is Preventative Maintenance? Every 60,000 mi / 96,000 km / 6 mos Oil Cooler • Clean the fins (air-to-oil type) and body. Check the hose condition and for leaks: replace as required. (Refer to Cooling System Maintenance in your chassis operator's manual maintenance instructions.) Every 37,000 mi / 60,000 km / 3 yr Main and Auxiliary Transmission – (VOCATIONAL and OFF-HIGHWAY) • Drain lubricant while warm. Flush each unit with clean flushing oil and refill.
MAINTENANCE - What is Preventative Maintenance? Peak Operational Temperature: 203°F (95°C) First 3,000-5,000 mi / 4,800-8,000 km Main and Auxiliary Transmission • Take vehicle to a PACCAR Powertrain distributor to determine the peak operating temperature for specific vehicle application. This temperature will determine which transmission maintenance intervals should be used for this vehicle (see Automatic Transmission Maintenance on page 29).
MAINTENANCE - What is Preventative Maintenance? Every 224,000 miles / 360,000 km / 4 yr Main and Auxiliary Transmission – (ON-HIGHWAY) • Drain lubricant while warm. Flush each unit with clean flushing oil and refill. Contact your PACCAR Powertrain distributor to drain the transmission.
MAINTENANCE - Troubleshooting Every 111,000 mi / 180,000 km / 3 yr Main and Auxiliary Transmission – (VOCATIONAL and OFF-HIGHWAY) • Drain lubricant while warm. Flush each unit with clean flushing oil and refill. Contact your PACCAR Powertrain distributor to drain the transmission. Every 223,000 mi / 360,000 km / 4 yr Main and Auxiliary Transmission – (CITY DELIVERY) • Drain lubricant while warm. Flush each unit with clean flushing oil and refill.
MAINTENANCE - Troubleshooting Transmission Reset Procedure In some cases, proper transmission operation can be restored by “resetting” the Transmission Control Module (TCM). Use the following procedure to reset the TCM. 1. Continue to drive the vehicle to a safe location before selecting Neutral (N). NOTE 5 Once Neutral (N is selected, a gear engagement may not be allowed depending on the specific problem. 2. 3. Place the Transmission Driver Interface Device in Neutral (N.
MAINTENANCE - Troubleshooting 5 Y53-1331 (6/21) 37
INFORMATION - Chapter 6 | INFORMATION Proper Transmission Lubrication.........................................................................................................39 General Model Information..................................................................................................................39 TX-8 Transmission Lubricant Capacities.............................................................................................40 Lubricant Specifications..................................
INFORMATION - Proper Transmission Lubrication Model Nomenclature Proper Transmission Lubrication Proper lubrication procedures are key to a good all-around maintenance program. If the lubricant is not doing its job or if the lubricant level is ignored, all other maintenance procedures are not going to keep the transmission running or assure long transmission life. Transmission internal parts are amply lubricated if these procedures are closely followed: 1. Maintain lubricant level and inspect regularly.
INFORMATION - TX-8 Transmission Lubricant Capacities Transmissions equipped with Power Takeoff (PTO) have larger capacities that those listed here. TX-8 Transmission Lubricant Capacities The oil capacities listed here reflect the approximate total amount required to maintain transmission lubrication in the operating range for the stated vehicle and hood configuration.
INFORMATION - Lubricant Specifications 6 Y53-1331 (6/21) 41
Index Index A F Adaptive Driving Mode 13 Adaptive Starting Gear 13 Adding Fluid, See How to Add Transmission Fluid Auto-neutral 13 Auto-park 13 Automatic Mode, See Manual and Automatic Mode Automatic Transmission Maintenance 29 Final Chassis Bill of Material 10 C Changing gears, See Gearshift Lever Checking Transmission Fluid, See How to Check Transmission Fluid D Diagnostics 35 Digital Display Transmission Gear Display 17 Transmission Temperature Gauge 17 DNRP, See Transmission Modes E Emergency Re
Index Lubricant Specifications 40 M Maintenance Manuals 10 Manual and Automatic Mode 19 Manual Mode 19 Manually Releasing the Parking Pawl 24 Model Nomenclature 39 Peak Operational Temperature: 221°F (105°C) Every 111,000 mi / 180,000 km / 4 yr 31 Every 37,000 mi / 60,000 km / 3 yr 31 Every 60,000 mi / 96,000 km / 6 mos 31, 33, 34 Every 74,000 mi / 120,000 km / 4 yr 31 First 3,000-5,000 mi / 4,800-8,000 km 31, 33, 34 Power Take-off (PTO) 26 Preventative Maintenance 30 Proper Transmission Lubrication 39
Index V Vehicle Towing 27
PACRI Powertrain P.O.
