Manual Value Proposition:
Essential for owners and mechanics needing to service or rebuild the R380 gearbox, saving on labor costs.
Niche Applicability:
Highly specialized for owners and mechanics dealing with the robust R380 manual gearbox, a key component in Land Rover's off-road legacy.
Manual Uniqueness:
Focuses specifically on the R380 gearbox overhaul, a critical component for these vehicles, unlike broader service manuals that might cover it less extensively.
Diagrams:
Detailed step-by-step diagrams
Instructions:
Clear, comprehensive instructions for workshop procedures
Practicality:
Enables users to maintain their vehicles effectively and save money.
Primary Focus:
R380 Manual Transmission Overhaul
Related Systems:
Clutch System (in relation to transmission removal/installation), Transfer Box (in relation to removal/installation and interaction with R380)
Gears And Shafts:
Detailed procedures for disassembly, inspection, and replacement of all gear sets, shafts (input, output, layshaft), and synchronizer assemblies.
Bearings And Seals:
Comprehensive instructions for identifying, replacing, and correctly seating all internal and external bearings and oil seals.
Casings And Housings:
Procedures for inspecting gearbox casings and housings for damage, cracks, or wear, and instructions for cleaning and preparation.
Transmission Overhaul:
Complete bench overhaul procedures for the R380 gearbox.
Component Replacement:
Step-by-step instructions for replacing internal transmission components.
Diagnostic Procedures:
Implied troubleshooting steps through detailed overhaul procedures.
Torque Specifications:
Essential torque settings for internal components, fasteners, and casing bolts.
Reassembly Sequence:
Precise step-by-step sequence for reassembling the R380 gearbox.
Special Tool Identification:
Identification and usage instructions for any specialized tools required for R380 overhaul.
Gearselector Mechanism:
Procedures for the external gear selector mechanism and its connection to the gearbox, as well as internal selector components.
Depth:
Comprehensive: Covers complete gearbox disassembly, inspection, repair, and reassembly on the bench.
Target Audience:
Professional Mechanics and Skilled DIY Technicians
Diagnostic Charts:
Likely includes diagnostic flowcharts or tables for common transmission faults.
Troubleshooting Guide:
Specific troubleshooting tips related to R380 operation and common failure modes.
File Type:
Portable Document Format (PDF)
Searchability:
Likely text-searchable (standard for quality PDF manuals)
Printability:
High (designed for printing sections or the entire manual)
Digital Delivery:
Instant download post-purchase
Delivery Method Binding:
N/A (Digital Download)
Delivery Method Paper:
N/A (Digital Download)
Image Resolution:
High-resolution images and diagrams suitable for clear viewing and printing.
Text Clarity:
Crisp, readable text for easy comprehension of instructions.
Applicable Engines For R380:
Typically mated to Rover V8 gasoline engines (e.g., 3.9L, 4.0L, 4.6L) and Land Rover's 300Tdi diesel engine.
Common Engine Displacement Range:
2.5L (Tdi) to 4.6L (V8)
Engine Configurations:
Inline 4-cylinder (diesel), V8 (gasoline)
Fuel Type:
Petrol (Gasoline), Diesel
Fuel Delivery Methods:
Diesel: Direct Injection; Gasoline: Multi-point Fuel Injection (MPI).
Engine Power Range:
Engines paired with R380 typically produced between 107 hp (300 Tdi) and 182 hp (4.6L V8), with torque figures varying significantly.
Transmission Type:
5-speed Manual Synchromesh
Gearbox Producer:
Rover Group (later adapted by Land Rover)
Gear Ratios:
Specific gear ratios would be detailed within the manual, but common ratios for R380 were: 1st: 3.32:1, 2nd: 2.04:1, 3rd: 1.32:1, 4th: 1.00:1, 5th: 0.77:1 (approximate and can vary by application).
Fluid Type Specification:
Typically uses GL-1 or GL-4 SAE 75W/90 or 80W/90 gear oil. Manual will specify exact Land Rover part number and viscosity.
Fluid Capacity Specification:
Approximately 2.25 litres (2.4 US quarts) for the gearbox. Manual will confirm.
Transfer Box Interaction:
Designed to integrate with Land Rover's LT230 transfer case (or similar variants), which is also a subject of removal/installation in the context of R380 service.
Applicable Vehicle Platform:
Defender (often XD/Wolf variants), Discovery 1, Range Rover Classic (later models).
Vehicle Body Styles With R380:
Range Rover Classic (3-door and 5-door), Discovery 1 (5-door), Defender (90, 110, 130 wheelbases).
Transmission Weight Approx:
The R380 gearbox itself is a heavy unit, typically weighing around 70-80 kg (150-175 lbs) before fluids.
Vehicle Era Infotainment:
Basic radio systems, optional cassette or CD players typical for mid-1990s vehicles. Transmission manual does not cover infotainment.
Vehicle Era Driver Assistance:
Limited to ABS braking systems, perhaps rudimentary traction control on some V8 models. Transmission manual does not cover driver assistance.
Transmission Fluid Change Interval:
Typically every 30,000 to 50,000 miles (48,000 to 80,000 km), or as specified by Land Rover. Manual will provide precise intervals.
Recommended Gear Oil Viscosity:
75W/90 or 80W/90 (GL-1 or GL-4 rated) - refer to manual for specific Land Rover approval.
Land Rover Part Number Guidance:
The manual is crucial for obtaining the correct LR part number for transmission fluid.
Common R380 Wear Items:
Wear in synchromesh rings, input shaft/output shaft bearings, selector seals, and potential wear on the reverse idler gear.
Symptoms Of Worn Components:
Difficulty engaging gears, grinding when shifting, gear whine, oil leaks.
Clutch Related Maintenance:
While not directly covered in this manual's overhaul, clutch wear and adjustment are critical for R380 longevity and will be in the vehicle's general repair manual.
Reverse Gear Issues:
Some R380 variants could experience wear in the reverse idler gear or its engagement mechanism, leading to potential grinding or disengagement.
Land Rover Transmission Legacy:
Land Rover has a long history of robust, off-road focused manual transmissions. The R380 is an evolution of previous gearboxes like the LT77.
R380 Transmission Introduction:
The R380 was introduced as a stronger, more refined manual gearbox, replacing earlier designs to handle increased torque and improve shift quality.
Vehicle Production Era:
Range Rover Classic: ~1970-1996, Discovery 1: ~1989-1998, Defender: ~1983-present (various iterations)
R380 Production Years In Context:
R380 was used in Land Rover vehicles through the late 1990s and early 2000s.
