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Drivetrain & Engine – Power Delivery, Gearing & Reliability
The Drivetrain & Engine range focuses on getting torque to the ground with robust, serviceable components. From differential lockers and ring & pinion sets to locking hubs, CV shafts and clutch kits, these are the parts that improve traction, gearing precision and reliability across road, trail and towing.
In this section: Browse all categories • Drivetrain & Engine – Quick Comparison • How to Choose the Right Setup • Related Sections • FAQ
Drivetrain & Engine Subcategories
- Air Actuator – pneumatic control for lockers and engagement mechanisms
- Clutch Kits – OE-grade and heavy-duty options for smooth, reliable power transfer
- CV Shafts & Boots – front axle and IFS components built for lifted and touring setups
- Differential Lockers – selectable and automatic lockers for maximum traction
- Hubs & Swivel Kits – complete rebuild kits for tight steering and leak-free service
- Locking Hubs – manual or automatic hubs to reduce wear and improve economy
- Portal Axle – gear-up hubs for extra ground clearance and torque multiplication
- Ring & Pinion – ratio changes for larger tyres, towing or low-range control
Drivetrain & Engine – Quick Comparison
| Subcategory | Purpose | Key Benefits | Considerations |
|---|---|---|---|
| Air Actuator | Actuate lockers / systems | Fast, reliable engagement | Requires air supply; routing integrity |
| Clutch Kits | Engine to gearbox coupling | Smoother take-up, durability | Match to torque & intended load |
| CV Shafts & Boots | Front axle articulation | Stronger joints, lift-friendly angles | Boot quality and angle limits |
| Differential Lockers | Maximise traction | True 50:50 drive, control | On-road behaviour, air/elec control |
| Hubs & Swivel Kits | Steering knuckle service | Reduced play, leak prevention | Correct shimming and torque |
| Locking Hubs | Engage/disengage front axle | Lower wear, improved economy | Manual operation vs convenience |
| Portal Axle | Clearance via hub reduction | + Ground clearance, torque | Unsprung mass, gearing alignment |
| Ring & Pinion | Final drive ratio change | Restores power band w/ larger tyres | Front/rear ratio match, break-in |
How to Choose the Right Setup
- Define use case: Daily driving, towing, overlanding or technical rock sections?
- Tyre size first: Larger tyres usually need ring & pinion changes to restore drivability.
- Traction next: Add lockers for controlled grip when and where you need it.
- Reliability pass: Service hubs & swivels, CVs and choose a clutch rated for the torque you plan to run.
Example: Moving from 31" to 33–35" tyres? Re-gear with a suitable ring & pinion ratio, add a rear locker for climb control and consider manual locking hubs to reduce front-end wear on long motorway stretches.
Fitment & Compatibility Guide
- Match axle ratios: Front and rear must use identical ratios to avoid drivetrain bind.
- Break-in procedure: New ring & pinion sets need gentle heat cycles and fluid changes.
- Compressor readiness: Air lockers need a reliable air source and protected lines.
- Clutch selection: Consider towing weight, remaps and tyre diameter when choosing a pressure plate and friction disc.
Upgrade Sequence Roadmap
| Stage | Focus Area | Why It Matters |
|---|---|---|
| 1 | Service & Rebuild | Restore baseline: bearings, seals, hub & swivel kits for reliability. |
| 2 | Gearing | Ring & pinion ratios to suit tyres, towing and terrain. |
| 3 | Traction | Selectable or automatic lockers for predictable grip. |
| 4 | Protection & Clearance | Portal axles (where applicable) for lift without suspension geometry stress. |
Related Sections
Frequently Asked Questions
- Do I need to change ring & pinion when fitting larger tyres?
- Often yes. Re-gearing restores factory-like acceleration and cruise RPM, improves towing and reduces clutch/gearbox strain.
- Which locker is better for daily use?
- Selectable (air/electric) lockers provide open-diff behaviour on-road and full lock off-road. They’re usually the best balance for mixed use.
- Are manual locking hubs worth it?
- For part-time 4WD, manual hubs can reduce front-end wear and improve fuel economy when disengaged. They require manual operation.
- What’s special about portal axles?
- Portal hubs raise the axle centreline, gaining ground clearance and torque multiplication without increasing suspension lift. They add weight and require gearing considerations.
- Do you ship drivetrain parts across Europe?
- Yes. OFM4x4 supplies and ships drivetrain components across the UK and Europe, with local stock options for faster delivery.
