Welcome to Your
4x4 Theory Training

⚙ How the 4x4 Drivetrain Works

A 4x4 vehicle can send power to all four wheels instead of just two. But it is not always in 4-wheel-drive mode. Understanding when to use each mode is critical for safety and for protecting the vehicle.

2H — Two-Wheel-Drive High Range

This is your default driving mode for tar roads and good gravel roads. Power goes to the rear wheels only. The vehicle drives like a normal bakkie. Use this on any hard, dry surface where traction is good. It gives you the best fuel economy and least drivetrain wear.

4H — Four-Wheel-Drive High Range

Engage 4H when the surface becomes slippery or loose — wet gravel, light mud, sandy patches, or when rain has made the road surface unpredictable. Power now goes to all four wheels, giving you much better traction. You can drive at normal speeds in 4H, but do not use it on dry tar as it damages the transfer case and tyres.

4L — Four-Wheel-Drive Low Range

Low range is for serious off-road situations: deep mud, steep inclines, rocky terrain, or any situation where you need maximum torque at very low speed. Low range multiplies the engine's torque (pulling power) and gives you much finer control over your speed.

🔐 Differential Lock

Your vehicle has a differential lock (diff lock) that forces both rear wheels (or in some vehicles, both front and rear axles) to turn at exactly the same speed. Normally, the differential allows the inside wheel to turn slower than the outside wheel during turns. The diff lock overrides this.

When to Use Diff Lock

• Deep mud where one wheel is spinning and the other has grip
• Diagonal terrain where one wheel lifts off the ground
• Steep loose-surface inclines where maximum traction is needed
• Rutted tracks where wheels are at different heights

When NOT to Use Diff Lock

• Never on tar or hard dry surfaces — the locked axle cannot compensate in corners, causing severe drivetrain strain and tyre scrub
• Never during sharp turns — the vehicle will understeer (push wide) or the tyres will skip
• Never at high speed — loss of steering control is very likely

📈 Traction Control Systems

Modern 4x4 vehicles come with electronic traction control that automatically brakes a spinning wheel and redirects power to the wheels with grip. This works well on mild terrain, but has limits:

• Traction control works by applying the brakes — in deep mud, this can slow you down when you need momentum
• Some situations require you to switch off traction control (deep mud, soft sand) to allow wheel spin for clearing debris
• Know how to switch it off AND back on in your specific vehicle

⚡ Gear Selection for Terrain

Terrain	Drive Mode	Gear	Notes
Tar road	2H	Normal	Default driving mode
Dry gravel	2H or 4H	Normal	4H if loose or corrugated
Wet gravel	4H	Normal	Reduced speed
Light mud	4H	2nd or 3rd	Maintain steady momentum
Deep mud	4L	2nd	Diff lock on, steady throttle
Steep incline	4L	1st or 2nd	Pre-select before the hill
Steep descent	4L	1st or 2nd	Engine braking, no clutch riding
Sand	4H or 4L	2nd or 3rd	Lower tyre pressure helps
Water crossing	4L	2nd	Slow and steady, no stopping

🚶 Walk-Around Inspection Procedure

Start from the driver's door and walk clockwise around the vehicle. Check every item systematically — never rely on memory or assumption.

📝 Reporting & Defect Categories

SASOL and the Mine Health & Safety Act require you to report all defects. Defects fall into two categories:

👁 Reading Terrain

Before you drive into any challenging section, stop and assess. Get out of the vehicle if needed. The best off-road drivers spend more time reading the ground than they do driving through it.

• Look at the colour: Darker ground is usually wetter and softer. Lighter/dry patches tend to be more solid.
• Look at the surface texture: Cracked mud is usually dry and firm underneath. Smooth, shiny mud is wet and slippery.
• Check for tracks: If other vehicles have made it through, follow their tracks — they've already proven the line.
• Look for vegetation: Grass and reeds growing in mud suggest it is consistently wet and soft — avoid those areas.
• Test with your boot: If you can't walk on it easily, the vehicle will struggle.

🌊 Mud Driving — Primary Focus

Mud is the most common challenge on SASOL farm roads, especially during the rainy season. Many vehicle recoveries and incidents start with poor mud driving decisions. Master this section.

Reading Mud Before You Enter

• Check the depth — use a stick or walk the edges. If the mud is deeper than your axle height, do not attempt it without recovery equipment.
• Check the bottom — is it clay (slippery but usually has a firm base) or black cotton soil (no bottom, very dangerous)?
• Check the width — can you see the end of the mud section? Never commit to a section you cannot see the exit of.
• Check for ruts — deep ruts can trap your vehicle. If ruts are deeper than your ground clearance, find another line.

Maintaining Momentum

Momentum is your best friend in mud, but too much is your worst enemy. The goal is steady, consistent speed — enough to keep moving but not so much that you lose control.

• Select your gear BEFORE entering the mud (2nd gear in low range is often ideal)
• Keep the throttle steady — do not accelerate hard or let off suddenly
• If the engine note drops (bogging down), gently increase throttle — do not floor it
• If you feel the vehicle slowing despite throttle, you may be getting stuck. It is better to stop early and reverse than to dig in deeper.

Straight-Line Travel

Steering Corrections

When the vehicle starts to slide or drift sideways in mud:

• Make small, gentle corrections — never jerk the wheel
• Steer in the direction you want to go (not the direction you're sliding)
• Maintain throttle — lifting off will cause you to lose momentum and sink
• If the rear steps out, a slight counter-steer and steady throttle will bring it back

When to Stop vs When to Commit

Recognising When You Are Getting Stuck

• The engine revs rise but speed drops — wheels are spinning, not gripping
• Mud is spraying high into the air behind you — wheels are digging, not driving
• The vehicle drops lower — the chassis is sinking into the mud
• You hear scraping underneath — the floor pan is touching the surface
• Steering becomes very heavy or unresponsive — mud is packed around the wheels

Recovery From Mud

• Rocking technique: Gently alternate between forward and reverse, using the vehicle's own weight to create a small groove. Each rock should gain a little more distance. Do not rush this.
• Reverse out: If rocking does not work within 3-4 attempts, try reversing back out along your own tracks. Your entry tracks are already compacted.
• Tyre pressure: Reducing tyre pressure to 1.2-1.5 bar increases the tyre's footprint and improves flotation. Only do this if you have a way to re-inflate.
• Traction aids: Floor mats, branches, or sand ladders placed under the driving wheels can provide grip.
• Call for recovery: If self-recovery fails, stop and call. Continued attempts cause more damage than professional recovery.

🌾 Farm & Rural Terrain

Gravel Road Management

• Reduce speed — stopping distance on gravel is 2-3 times longer than on tar
• Avoid harsh braking — lock-ups and skids are far more likely on loose gravel
• Watch for corrugation — it reduces steering control. Slow down until the vehicle feels stable
• Stay in your lane — oncoming vehicles kick up dust and stones
• Increase following distance to at least 4-5 seconds

Ruts and Washouts

• Straddling ruts: If the ruts are shallow enough, straddle them with your wheels on the ridges. This gives better ground clearance.
• Following ruts: If ruts are deep, it may be safer to let the wheels follow the ruts. Your ground clearance between the ruts is your limit.
• Washouts: Approach slowly, assess depth. Cross at an angle if the washout is not too wide. Never drive through at speed.

Water Crossings

Farm Gates and Cattle Grids

• Slow to walking pace before a cattle grid — hitting it at speed can damage suspension
• Check the grid is intact before crossing — missing bars can trap a wheel
• Close all gates after passing through — livestock management is critical on farms

▲ Inclines & Descents

Hill Ascent

1. Assess from the bottom: Can you see the top? Is the surface firm or loose? Is there an escape line if you fail?
2. Select gear before the hill: 4L, 1st or 2nd gear. Never change gear on a steep incline.
3. Commit fully: Once you start, maintain steady throttle. Do not stop halfway. Do not hesitate.
4. The commitment point: Once past the halfway mark, you are committed. Reversing down is more dangerous than continuing up.
5. If you fail: Foot on brake, engage handbrake, select reverse. Reverse straight back down using engine braking. Do not turn on the hill.

Hill Descent

1. Stop at the crest: Assess the gradient, length, and surface before going over.
2. Select 4L, 1st gear before the descent. Let engine braking do the work.
3. Feet off the brake: On steep descents, your engine in low range 1st gear is a more effective brake than your pedal. Using the brake pedal causes lock-ups on loose ground, and overheats brakes on long descents.
4. If the vehicle starts to slide: Gently apply brakes to regain control, then release. Locking the wheels means zero steering control.
5. Descend straight: Never traverse across a steep slope — rollover risk is extreme.

Side Slopes & Rollover Risk

👀 Surface Reading & Line Selection

• Gravel stability: Loose, round stones (like river pebbles) are the most slippery. Angular, compacted gravel gives better grip.
• Sand vs compacted earth: Sand shifts under the tyres and demands lower pressure and momentum. Compacted earth is firm but becomes glass-like when wet.
• Wet vs dry: Any surface becomes more treacherous when wet. Clay becomes ice. Grass becomes a slide. Even good gravel loses 40-50% of its grip.
• Line selection: The fastest line is rarely the safest. Look for the firmest ground, the least gradient, and the fewest obstacles. Your line is your plan — stick to it.

⚡ Momentum Management

Momentum is the controlled use of speed and vehicle weight to carry you through challenging terrain. It is the most misunderstood concept in off-road driving.

The rule: As slow as possible, as fast as necessary. This applies to every off-road situation.

👁 Hazard Recognition & Scanning

A defensive driver is always scanning — far ahead, to the sides, and behind. Use a systematic scanning pattern:

• Far ahead (12 seconds): Look well ahead for changes in road condition, oncoming vehicles, intersections, or hazards.
• Near ahead (4 seconds): Check the road surface immediately ahead for potholes, debris, or animals.
• Mirrors: Check every 5-8 seconds. Know what is behind and beside you at all times.
• Blind spots: Before changing lanes or turning, check your blind spot with a head turn.

🚗 Safe Following Distances

Surface	Minimum Following Distance	Why
Dry tar	3 seconds	Standard safe distance
Wet tar	4-5 seconds	Increased braking distance
Dry gravel	4-5 seconds	Loose surface, stone throw risk
Wet gravel / mud	6-8 seconds	Very long stopping distance, low visibility from spray
Behind heavy equipment	50+ metres	Load spill risk, wide turning, blind spots

🏗 Interaction with Heavy Mining Equipment

• Heavy equipment always has right of way on mine roads
• Haul trucks have massive blind spots — if you cannot see their mirrors, they cannot see you
• Never overtake heavy equipment unless you have clear visual confirmation and radio contact
• Maintain at least 50m distance when following
• Pull over and stop completely when heavy equipment is approaching on a narrow road
• Never drive under a raised bucket, boom, or load

👦 Pedestrian Awareness

• Mine sites have pedestrians in unexpected locations — always assume someone could step out
• Reduce speed near workshops, offices, change houses, and parking areas
• Make eye contact with pedestrians before proceeding
• Sound your horn at blind corners and building exits
• Never reverse without checking behind the vehicle first — walk around if necessary

🌫 Speed Management & Visibility

• Dust: When dust reduces visibility, slow down, increase following distance, and turn on headlights. If you cannot see 50m ahead, stop until the dust clears.
• Rain: Reduce speed by at least 20%. Surfaces that were safe at 60 km/h may be dangerous at 40 km/h when wet.
• Night driving: Reduce speed to match your headlight range. If you are driving at 80 km/h, you need to see at least 100m ahead to stop safely.
• Fog: Low beam only (high beam reflects back). Hazards on. Reduce speed dramatically.

💛 SASOL Life Saving Rules Alignment

SASOL's Life Saving Rules that apply directly to driving include:

• Do not exceed the speed limit — site speed limits exist for a reason
• Always wear your seatbelt — no exceptions, no excuses
• Do not use a mobile phone while driving — hands-free or not, it distracts
• Do not drive under the influence of alcohol or drugs
• Report all incidents, near-misses, and hazards immediately
• Only operate equipment you are trained and authorised to use

🛑 Emergency Braking

On Tar

Apply brakes firmly and progressively. If your vehicle has ABS (Anti-lock Braking System), press hard and hold — the ABS will pulse the brakes to prevent lock-up. You will feel a vibration through the pedal. This is normal. Keep pressing.

On Gravel

ABS is less effective on loose gravel. Press firmly but be prepared for longer stopping distances. If the vehicle starts to slide, ease off slightly and reapply. Avoid swerving while braking — one action at a time.

On Mud

Braking on mud gives almost no stopping power. The best strategy is to reduce speed before the hazard. If you must brake, pump gently (even with ABS) and steer around the hazard if possible. Downshifting to use engine braking is more effective than the brake pedal on slippery surfaces.

ABS vs Non-ABS

Feature	ABS Vehicle	Non-ABS Vehicle
Braking technique	Press and hold firmly	Pump the brakes (cadence braking)
Steering while braking	Yes — ABS allows it	Very limited — locked wheels cannot steer
Loose surfaces	May increase distance slightly	Can be more effective (locked wheels build a wedge of material)

↺ Evasive Steering

• If an obstacle appears suddenly and you cannot stop in time, steer around it
• Steer — do not swerve. A smooth, deliberate steer is safer than a panic swerve.
• Steer to the left (towards the verge) where possible — not into oncoming traffic
• Only steer when you have released or eased off the brakes. Braking and steering at the same time overloads the tyres.
• Once past the obstacle, steer back smoothly — do not overcorrect

💥 Tyre Blowout Response

1. Do NOT brake. This is the most important thing. Braking on a blown tyre causes the vehicle to pull violently towards the blown side.
2. Hold the steering wheel firmly with both hands. The vehicle will pull — resist it with steady counter-steering.
3. Gently accelerate briefly to stabilise the vehicle and maintain forward motion.
4. Gradually ease off the throttle and let the vehicle slow down naturally.
5. Indicate and pull off the road to a safe, flat area when speed has dropped to below 30 km/h.
6. Turn on hazard lights immediately.

⚠ Rollover Prevention

• Reduce speed on curves, especially on elevated or cambered roads
• Avoid sudden steering inputs at speed
• Secure all loads — shifting cargo raises the centre of gravity
• Do not attempt slopes that feel unsafe — a 4x4 is not a tank
• If you feel the vehicle leaning, steer gently into the lean (downhill) to bring it back
• Never attempt to jump or drive at speed over a crest

📱 When to Stop and Call for Help

⚖ Mine Health & Safety Act (MHSA)

The MHSA is the primary law governing safety on South African mines. Key requirements for drivers:

• You must be medically fit and hold a valid driver's licence for the class of vehicle you operate
• You must be trained and declared competent before operating any vehicle on site
• You must report any unsafe condition or act that could lead to an accident
• You have the right to refuse work if you believe it poses a danger to your health or safety (Section 23)
• You must comply with all site traffic rules, speed limits, and safety procedures
• The employer must provide a safe vehicle, and you must report any defects

📚 Unit Standard 254135

This training programme is aligned to Unit Standard 254135: Operate a 4x4 vehicle in an off-road environment. This is a SAQA-registered unit standard that covers:

• Pre-operational checks on a 4x4 vehicle
• Driving a 4x4 on various off-road surfaces
• Negotiating obstacles, inclines, and descents
• Water crossings and mud navigation
• Basic vehicle recovery
• Environmental care and sustainability while driving off-road

🚧 Site Traffic Management

• Every mine has a Traffic Management Plan (TMP). Know yours.
• Speed limits on site are typically 40 km/h (paved) and 20-30 km/h (unpaved) unless otherwise posted
• Obey all signage, even temporary signs during construction or blasting
• Right of way rules on mine roads often differ from public roads — heavy equipment typically has priority
• Some areas may be restricted or require permits — know your access zones

📝 Reporting Obligations

• All incidents must be reported: collisions, near-misses, vehicle damage, road hazards, and injuries
• Immediately: stop, secure the scene, check for injuries, report to your supervisor
• Do not move the vehicle after an accident unless it is in danger (fire, further collision)
• Complete an incident report form as soon as practically possible — while details are fresh
• Serious incidents must be reported to the mine manager and the Department of Mineral Resources and Energy

👤 Your Responsibilities

🧠 What the Tests Measure

The psychomotor tests do not measure knowledge (that is what this theory assessment is for). Instead, they measure your brain-body connection — how fast you react, how well you coordinate, and how consistently you pay attention. These are the skills you use every second behind the wheel.

📊 How Results Connect to Your Training

Your theory assessment (the quiz below) grades you across five off-road driving competence areas. Your instructor uses these results alongside your Moto-R psychomotor scores to build your personalised practical training plan for Day 2:

Off-Road Competence Area	What It Covers
Emergency Response & Recovery	Mud recovery, failed ascents, blowouts, brake fade, emergency braking on off-road surfaces
Speed Management & Safe Following	Following distances on gravel/mud, approach speeds, water crossing depth, night driving limits
4x4 Drivetrain & Vehicle Handling	Transfer case, diff lock, gear selection for inclines/descents/mud, low range technique
Inspection & Hazard Identification	Pre-trip walk-around, defect classification, mud assessment before entry, mine hazard scanning
Terrain Reading & Route Assessment	Mud types, surface colour/texture, line selection, slope risk, vehicle symptom diagnosis

🏆 A / B / C Classification

Your theory results are classified using the A/B/C system per competence area:

Your classification tells the instructor where to focus your practical training time. A "C" in a domain does not mean you fail — it means you need more coaching in that area.