Paccar TX-8 Operator's Manual
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Paccar TX-8 Operator's Manual

8 speed transmission
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Summary of Contents for Paccar TX-8

  • Page 1 TX-8 8 Speed 8 Speed Transmission Transmission Operator’s Manual Operator’s Manual...

  • Page 3: Table Of Contents

    Contents Safety........Features........Indications and Controls........Operation........Maintenance........Information........
  • Page 4 The information contained in this manual is proprietary to PACCAR. Reproduction, in whole or in part, by any means is strictly prohibited without prior written authorization from PACCAR Inc.
  • Page 6 SAFETY - Chapter 1 | SAFETY Using this Manual..........................5 Safety Alerts............................5 Illustrations............................6 General Safety Instructions........................6 Repairs..............................9 Y53-1331 (6/21)

  • Page 7: Using This Manual

    SAFETY - Using this Manual Therefore, you should pay careful attention right to make changes at any time without to the instructions that pertain to just your notice. Using this Manual vehicle. In addition, if your vehicle is equipped with special equipment or options Please take the time to get acquainted with not discussed in this manual, consult your Safety Alerts...

  • Page 8: Illustrations

    SAFETY - Illustrations When an illustration differs from what you may result in equipment or property see physically present on your vehicle, the WARNING damage. language describing the procedure will still be correct for your application. Notes Hot engine oil can be dangerous. You could be burned.
  • Page 9 SAFETY - General Safety Instructions Before performing any repair, read and loose tools, parts, ignition sources ous 30 minutes, be very careful in re- understand all of the safety precautions and hazardous substances. moving the fill cap. Protect face, and warnings. The following is a list of •...
  • Page 10 Use only genuine ignition or governor control wiring. avoid prolonged or repeated replacement parts from PACCAR. This can cause electrical damage contact with skin. DO NOT • Always use the same fastener part to the ignition or governor.

  • Page 11: Repairs

    SAFETY - Repairs • Coolant is toxic. If not reused, immediately flood eyes with water vehicle unsafe. Perform only those dispose of coolant in accordance for a minimum of 15 minutes. Avoid tasks you are fully qualified to do. with local environmental prolonged contact with skin.
  • Page 12 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. If you aren’t an experienced mechanic, or don’t have the right equipment, please leave all repairs to a PACCAR Powertrain distributor.
  • Page 13 SAFETY - Repairs Y53-1331 (6/21)

  • Page 14: Features

    FEATURES - Chapter 2 | FEATURES Auto-neutral............................13 Adaptive Driving Mode........................13 Adaptive Starting Gear........................13 Auto-park (option)..........................13 Engine Overspeed and Underspeed Protection..................14 Hill Start Aid (option)........................... 14 LOW Mode............................14 Neutral Idle Control Plus (NIC+)......................15 Parking Pawl (option).......................... 15 Y53-1331 (6/21)

  • Page 15: Auto-Neutral

    FEATURES - Auto-neutral The feedback used to determine an ideal and then press the service brake be- shift schedule also helps protect the Auto-neutral fore a new mode can be selected. transmission from shift selections falling outside the acceptable range for the The Auto-neutral feature will automatically intended gear.

  • Page 16: Engine Overspeed And Underspeed Protection

    FEATURES - Engine Overspeed and Underspeed Protection pedal. Hill Start Aid can be disabled using (except in conditions requiring the Hill Start Aid Disable switch (see Hill overspeed protection – see Engine NOTE Start Aid Disable Switch). Overspeed and Underspeed Hill Start Aid activates by default on a road Protection on page 14).

  • Page 17: Neutral Idle Control Plus (Nic+)

    FEATURES - Neutral Idle Control Plus (NIC+) is at a standstill and the ignition switch is turned to OFF. The parking pawl uses the Neutral Idle Control Plus pawl to lock the transmission output that (NIC+) engages in the meshing of the output shaft. This locks the rear wheels by means of the driveshaft.

  • Page 18: Indications And Controls

    INDICATIONS AND CONTROLS - Chapter 3 | INDICATIONS AND CONTROLS Digital Display............................. 17 Gearshift Lever............................18 Hill Start Aid Disabled Warning Light (option)..................20 Hill Start Aid Disable Switch (option)....................20 Power Take-off (PTO) Switch (option)....................20 Y53-1331 (6/21)
  • Page 19 INDICATIONS AND CONTROLS - Digital Display – Shift Position Unknown Digital Display Transmission Gear Display Primary Gauges View The following indications appear next to R (Reverse), when the feature or condition is active: Transmission Temperature Multi-reverse Gear – Shift Position Unknown Transmission Gear Display The following indications appear generally in the Gear Display when the feature or...
  • Page 20 INDICATIONS AND CONTROLS - Gearshift Lever transmission. Watch this gauge to know Transmission Modes when the transmission is overheating and if NOTE so, have it checked by an authorized service representative. Vehicles without a Park (P) mode must be in Neutral (N) to start the engine. Gearshift Lever Upshifting and Downshifting The gearshift is located on the right-hand...
  • Page 21 INDICATIONS AND CONTROLS - Gearshift Lever Manual Mode • Pushing or pulling the lever will Manual and Automatic Mode Use Manual mode when driving conditions briefly upshift or downshift the make it preferable to select a particular transmission gear respectively gear instead of allowing the transmission to (about four seconds);...
  • Page 22 INDICATIONS AND CONTROLS - Hill Start Aid Disabled Warning Light (option) transmission system will override the Manual position and perform an upshift. Hill Start Aid Disable Power Take-off (PTO) Switch (option) Switch (option) NOTE Two-position Switch Two-position Switch The transmission initiates upshifts from Manual for engine overspeed protection.
  • Page 23 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.

  • Page 24: Operation

    OPERATION - Chapter 4 | OPERATION How to Check Transmission Fluid.......................23 How to Add Transmission Fluid......................23 How to Drain the Transmission......................24 LOW Mode Operation......................... 24 Manually Releasing the Parking Pawl....................24 Snow/Ice Operation..........................25 Start-Up and Power Down........................25 Transmission Power Take-off (PTO) (option)..................26 Vehicle Towing............................

  • Page 25: How To Check Transmission Fluid

    OPERATION - How to Check Transmission Fluid Find the red-handled transmission- NOTE fluid dipstick, located drivers-side, How to Check outward of the engine. Transmission Fluid Observe markings at end of dipstick. Twist and remove dipstick, and Your dipstick has a full and add line for wipe clean using towel or cloth.

  • Page 26: How To Drain The Transmission

    Take Manually Releasing the DO NOT add fluid into dipstick hous- your vehicle to a PACCAR Powertrain ing. Parking Pawl distributor for maintenance processes that require draining transmission lubricant.

  • Page 27: Snow/Ice Operation

    OPERATION - Snow/Ice Operation slippage, the driver should select Manual mode. Manual mode holds the current gear Parking Pawl Manual Release position under most operating conditions- the transmission will only shift when the driver uses the up/downshift request. Once road conditions improve, the driver should revert back to Drive mode.

  • Page 28: Transmission Power Take-Off (Pto) (Option)

    OPERATION - Transmission Power Take-off (PTO) (option) reflect the appropriate transmission The PTO is geared to the transmission NOTE mode: N or P. torque converter, so the PTO will run at speeds proportional to engine rpm. The engine will not start if Neu- Bring the vehicle to a complete NOTE tral (or Park) is not selected on...

  • Page 29: Vehicle Towing

    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.

  • Page 30: Maintenance

    MAINTENANCE - Chapter 5 | MAINTENANCE Automatic Transmission Maintenance....................29 What is Preventative Maintenance?....................30 Troubleshooting...........................35 Y53-1331 (6/21)
  • Page 31 PACCAR Powertrain distributor technician The hydraulic pressure needed to shift degrading its lubricating properties. early in the truck's life (collected during the...
  • Page 32 (2) block the wheels, and (3) When working underneath the vehicle PACCAR Powertrain distributor. ensure that the shift lever or selector is without appropriate safety stands but in Neutral. Failure to comply may re-...
  • Page 33 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).
  • Page 34 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 74,000 mi / 120,000 km / 4 yr Main and Auxiliary Transmission –...
  • Page 35 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 120,000 miles / 193,000 km / 4 yr Main and Auxiliary Transmission –...
  • Page 36 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. Peak Operational Temperature: 185°F (85°C)
  • Page 37 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 –...
  • Page 38 They can’t answer your warranty safe location before selecting questions, but can get you in Neutral (N). Roadside Assistance contact with a PACCAR Powertrain Call toll-free to talk to someone at the distributor who can. NOTE PACCAR Customer Center: •...
  • Page 39 MAINTENANCE - Troubleshooting Y53-1331 (6/21)

  • Page 40: Information

    INFORMATION - Chapter 6 | INFORMATION Proper Transmission Lubrication......................39 General Model Information........................39 TX-8 Transmission Lubricant Capacities.....................40 Lubricant Specifications........................40 Y53-1331 (6/21)

  • Page 41: Proper Transmission Lubrication

    INFORMATION - Proper Transmission Lubrication Model Nomenclature Proper Transmission Following is a nomenclature tree that describes the multiple configurations of the Lubrication transmission model numbers: Proper lubrication procedures are key to a 8 0 - 14F 1 12 C 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...

  • Page 42: Transmission Lubricant Capacities

    INFORMATION - TX-8 Transmission Lubricant Capacities Transmissions equipped with Power Take- off (PTO) have larger capacities that those listed here. TX-8 Transmission Lubricant Capacities Lubricant Specifications The oil capacities listed here reflect the approximate total amount required to PACCAR approves the use of ZF-Ecofluid...
  • Page 43 INFORMATION - Lubricant Specifications Y53-1331 (6/21)
  • Page 44 Index Index Adaptive Driving Mode Final Chassis Bill of Material Adaptive Starting Gear Adding Fluid, See How to Add Transmission Fluid Auto-neutral Auto-park Automatic Mode, See Manual and Automatic Mode Gear Display Automatic Transmission Maintenance Gear stick, See Gearshift Lever Gearshift Lever General Safety Instructions Changing gears, See Gearshift Lever...
  • Page 45 Every 335,000 miles /540,000 km / 4 yr Troubleshooting Every 60,000 mi / 96,000 km / 6 mos 31, 33, TX-8 First 3,000-5,000 mi / 4,800-8,000 km 31, 33, Peak Operational Temperature: 203°F (95°C) Every 120,000 miles /193,000 km / 4 yr...
  • Page 46 Index Vehicle Towing...
  • Page 48 PACRI Powertrain P.O . Box 1518 x 1518 Bellevue , WA 98009 A 98009 Y53-1331...

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