1998-2004 Nissan Frontier Automatic Transaxle AT Repair Manual

This comprehensive manual details the Automatic Transaxle (AT) for 1998-2004 Nissan Frontier models, covering removal, installation, overhaul, and troubleshooting. Part #: RL4R01A

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Nissan Models Covered & Key Technical Specifications

Models: Nissan Frontier
Sub-models / Variants: Automatic Transaxle (AT), RL4R01A, 2-door models, 4-door models, VG33E, VG33ER
Build Years: 1998–2004
Technical Data:

  • Transmission model: RL4R01A
  • Fluid capacity: 7.9 US qt (8-3/8 Imperial qt)
  • Stall torque ratio: 2.0:1
  • 1st gear ratio: 2.785
  • Reverse gear ratio: 2.272
  • Top gear ratio: 1.000
  • Overdrive gear ratio: 0.694
  • Line pressure (Idle): 471–510 kPa (68–74 psi)
  • Stall revolution range: 2,100–2,300 rpm
  • Lock-up control (D4): 105–113 km/h (65–70 MPH)
Technical Specifications
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Document Number / Seller:
26743 / Linda Phillips
File Size:
411.81 MB
File Type:
ZIP
Language:
English
Printable:
Yes
Category:
Truck
Last updated / verified
Sep 25, 2025

Nissan Manual Features & Content Preview

1998–2004 Nissan Frontier RL4R01A Automatic Transmission Documentation

  • Covers 1998–2004 Nissan Frontier automatic transmission (RL4R01A) units, including diagnostic, overhaul, and adjustment procedures
  • Official manufacturer documentation, Nissan publication PFP:00000
  • Contains 47 detailed system diagrams, torque specifications, and electrical component inspection tables
  • Downloads to your account within seconds of checkout
  • Indexed PDF search covers every chapter and appendix
  • Laid out for standard letter and A4 printing
  • This 1998–2004 Nissan Frontier reference is the specific factory documentation for the RL4R01A transmission build, detailing everything from basic fluid maintenance to internal component overhauls

Transmission Diagnostics and Procedures

This Nissan Frontier 1998–2004 service manual provides extensive details for maintaining and troubleshooting the RL4R01A automatic transmission. The documentation includes sections on the Automatic Speed Control Device (ASCD) and the A/T shift lock system, detailing power supply routing, component locations, and fail-safe system logic. Coverage includes electrical circuit diagrams, symptom charts for troubleshooting shift quality, and diagnostic procedures for solenoid valve faults and sensor inputs.

The manual details the RL4R01A automatic transmission construction, describing the dual planetary gear system, clutch operation, and hydraulic control circuits. The information covers removal and installation steps, torque values for internal components, and specialized procedures for the oil pump, control valve assembly, and torque converter maintenance. Guidance on A/T fluid checks, line pressure tests, and stall tests is provided to help determine mechanical integrity.

Technical Specifications Preview

The technical data section documents critical reference values for the RL4R01A. The line pressure at idle is documented at 471–510 kPa in the hydraulic specifications. The stall revolution standard for the Nissan Frontier 1998–2004 is listed at 2,100–2,300 rpm. Fluid capacity for the RL4R01A transmission is 7.9 US qt. This factory manual offers an authoritative guide for what an OEM service publication covers regarding the drivetrain, electrical, and control systems of the 1998–2004 Nissan Frontier.

Document Reference: Nissan PFP:00000

Manual FAQ, Purchase & Download Details

What technical reference data for the RL4R01A automatic transmission is included in this document? keyboard_arrow_down

Manual includes technical specification tables that list gear ratios, stall torque ratios, fluid capacities, line pressure values, and stall revolution ranges for the RL4R01A transmission. These tables provide a central location for reviewing the factory-specified operating data for this specific model.

Is there a diagram showing the component parts and harness connector locations for the automatic speed control system? keyboard_arrow_down

Document contains an exploded view and system layout diagrams that illustrate the positions of the ASCD motor actuator, control unit, and various switches.

Are there reference charts regarding fluid capacities for the Nissan Frontier automatic transmission? keyboard_arrow_down

Specification tables within the manual list the recommended fluid capacity in both US and Imperial quarts. These data points are provided as part of the formal service specifications for the transaxle.

Which chapters contain technical information regarding the accelerator control system? keyboard_arrow_down

Accelerator Control System is covered in Section B, which includes specifications, system components, and adjusting data for the accelerator wire.

Can this PDF be used to preview the electrical system for the cruise control unit? keyboard_arrow_down

Manual provides comprehensive wiring diagrams for the Automatic Speed Control Device, including detailed circuit references for the control unit, switches, and sensors. It also covers the logic behind the power supply and ground circuits to assist in system familiarity. You can use these schematics to examine the interconnections between the ASCD control unit and the vehicle wiring harness.

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