When a fleet specifies an EV truck, the headline numbers — battery and range — get the attention, but the drivetrain layout decides efficiency, packaging and long-term maintenance. The two mainstream architectures are the central motor with driveshaft and the e-axle, where the motor sits at the wheel end. Using the Dongfeng TE8M electric tractor as the reference, this article explains both layouts so a buyer can choose the right electric truck drivetrain for Gulf duty, and it works through the efficiency, packaging and service trade-offs that determine which is the lower-risk buy today.
The central motor layout puts a LvKong permanent-magnet motor amidships, driving a traditional driveshaft and axle. It is the conservative, proven architecture: familiar packaging, easy service access, and a driveline that shares parts logic with diesel trucks. The TE8M uses this layout with a 282–350 kWh CATL LFP pack and a 282–350 kW LvKong motor. The advantages are maturity and repairability; the cost is the parasitic loss through the driveshaft and the space the shaft and differential occupy, which is space a battery could otherwise use.
| Attribute | Central motor | E-axle |
|---|---|---|
| Packaging | Shaft + diff take space | Compact, flat floor |
| Efficiency | Good (shaft loss) | Best (direct drive) |
| Service access | Easy, familiar | Axle-end, newer |
| Regenerated braking | Strong | Strongest |
| Maturity | Proven | Growing |
For most current Dongfeng heavy EVs the central motor is the production standard, which is why the TE8M is the available, low-risk choice today for fleets that value uptime above the last percent of efficiency.
The e-axle integrates the motor, reduction gear and axle into one wheel-end unit, removing the driveshaft entirely. This recovers the space and mass the shaft used, improves efficiency through direct drive, and enables precise torque control per wheel. The trade is newer service practice and higher integration cost. On a flat-floor cargo or a tight tractor, the e-axle’s packaging win is significant; on a heavy-haul tractor the central motor’s serviceability still wins for many fleets that already run diesel-style workshops and trained mechanics. The integration also means a single sealed unit survives harsh duty better, but it concentrates value in one part, which is why the insurance and spare strategy differ from the central-motor layout.
The efficiency gap is real but modest on the highway. A central-motor TE8M at 1.2 kWh/km on a Saudi trunk loses a few percent through the shaft; an equivalent e-axle would trim that toward 1.1 kWh/km. Over 60,000 km/year that is roughly 6,000 kWh — about US$480 at US$0.08/kWh. The bigger win is in stop-start yard and urban duty, where the e-axle’s direct regen recovers more on every stop. For long-haul Gulf trunk, the central motor’s maturity usually outweighs the small efficiency edge, and the fuel-equivalent saving alone rarely justifies the newer service chain.
The central motor has fewer unknowns: driveshaft, differential and motor are separately serviceable, and the LvKong permanent-magnet unit needs almost no maintenance beyond bearing checks. The e-axle bundles those parts, so a fault can mean a whole-axle swap rather than a component fix. For a Saudi fleet with established diesel-style workshops, the central motor keeps training and spares simple, which is why the TE8M’s layout is the pragmatic default for heavy-haul duty today, and why it carries the lower risk during the warranty and beyond.
| Maintenance factor | TE8M central motor | E-axle equivalent |
|---|---|---|
| Motor service | Separate, simple | Integrated swap |
| Spares pool | Shared LvKong parts | Axle-specific |
| 8-year pack warranty | 4,500 cycles to 70% SOH | 4,500 cycles to 70% SOH |
| Best duty | Heavy-haul trunk | Urban / flat-floor |
The e-axle’s per-wheel torque control is genuinely useful on soft sand and grade, where independent traction beats a single shaft. But the central motor with differential traction control already covers most Saudi paved-trunk conditions, and the TE8M’s 282–350 kW LvKong motor delivers the grade performance the 49 t GCW duty needs. For operators running inland to the empty-quarter fringes, the traction argument for an e-axle is stronger; for the majority on paved inter-city lanes, the central motor is enough and simpler to keep running. The heat is the other Gulf variable: an e-axle packs power electronics at the wheel end where road temperature is highest, while the central motor sits in the cooler chassis tunnel with better airflow, which matters on a 50°C summer day on the Riyadh beltway. For a fleet whose reputation rides on uptime through that heat, the central motor’s thermal position is a quiet but real advantage that the spec sheet rarely shows.
Saudi fleets value uptime and familiar service, which favours the central-motor layout for now. The Saudi Arabia electric truck market guide covers Dammam/Jeddah clearance, R100 homologation, and depot charging layout. As e-axle service networks mature, the efficiency case will grow, but today the TE8M’s central motor is the lower-risk electric truck drivetrain for Gulf heavy-haul, and the configuration Dongfeng ships in volume with proven support.
The TE8M carries the Dongfeng 8-year / 4,500-cycle warranty to 70% SOH, and the central-motor layout keeps the support simple because the motor, driveshaft and differential are separately serviceable. Hold a spare LvKong motor module and a spare inverter at the central workshop; the high-voltage items are field-swapped, so a drivetrain fault is a shift job, not a week off the road. Saudi operators used to diesel drivetrains will recognise the service logic, which is exactly why the central motor lowers training cost and keeps availability high during the warranty and beyond.
For financiers the transferable warranty is what makes the central-motor tractor bankable: a three-year-old unit still carries years of pack cover, supporting a higher residual and cheaper project finance. Record every charge event and the duty cycle, because a clean, verified history is what the next owner pays a premium for at trade-in. The combination of familiar service, shared spares and a documented warranty is what keeps a TE8M fleet above 95% availability on the Gulf trunk, and availability is the real driver of payback on a long-haul lane where every parked tractor is freight not moved.
If your duty is heavy-haul trunk with established workshops, specify the central-motor TE8M: proven, serviceable, and backed by the shared LvKong parts pool. If your duty is dense urban delivery where packaging and regen matter most, watch the e-axle as it matures and weigh the flat-floor gain. For the majority of Saudi buyers today, the central motor is the right electric truck drivetrain — efficient enough, far easier to keep on the road, and the configuration Dongfeng ships in volume. Choose it for uptime first; revisit the e-axle when the local service network proves it out.
Ready to electrify your fleet? Contact Shaanxi Fenghan Trading — authorized Dongfeng EV truck exporter. WhatsApp: +86 153 1943 1311 | Email: sales@fenghan-trade.com | dongfengevtrucks.com
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