Transmissions & Drivetrains

New 6-speed gearboxes, plus choice of 2WD or 4WD systems

New Sorento buyers will be offered a choice of transmissions and drivetrains – depending on model. In Europe, every model will feature a six-speed transmission (manual or automatic) and all will be fitted with ‘high’ top gear ratios for reduced engine revs and improved fuel economy when cruising at higher speeds.

Both the six-speed transmissions are new or upgraded. Developed primarily with European markets in mind, the six-speed manual transmission will be manufactured in two versions with different torque capacities for use with either the gasoline or diesel engines.

Both these six-speed manual transmissions feature multi-cone synchronisation, optimised gear design, reduced weight, enhanced efficiency, reduced power loss, an optimised differential casing and enhanced durability up to 300,000 kilometres and they are filled with low-viscosity oil. Both are maintenance-free units requiring no servicing during the life of the vehicle.

All-new, world-class six-speed automatic transmission

New Sorento introduces Kia’s all-new, innovative six-speed automatic transmission – the most compact six-speed unit currently available anywhere in the world. This unit has 62 fewer parts than a five-speed unit, is 54 mm shorter, weighs 12 kilos less and boosts fuel economy by up to 12%. Part of the improved fuel economy results from the innovative ‘Neutral Control’ which automatically shifts the transmission from ‘D’ to ‘N’ whenever the car is stopped for more than a few seconds – reducing engine load.

The new six-speed automatic features a unique layout which enables it to be smaller, more compact and lighter than any other six-speed automatic on the market today. Like the six-speed manual, it is a ‘filled for life’ maintenance-free unit requiring no servicing during its lifetime.

The transmission is a regular ‘torque converter’ automatic, but it incorporates a unique ‘flat’ torque converter, which accounts for 12 mm of the (54 mm) reduction in the unit’s overall length, and features three planetary gearsets and four pinion differentials. A clever redesign of the hydraulic pressure control unit allows the transmission’s eight solenoid valves to be individually calibrated at the vehicle assembly plant, to ensure ultra-fast, smooth and precise gearshifts throughout the engine speed range.

In the cabin, a gate-type shift pattern offers the driver a choice of two operating modes. For town driving, fully automatic mode delivers all the usual benefits. For greater driver involvement, sport mode allows clutch-less sequential manual gear changes – up or down, one ratio at a time.

With this transmission the Hyundai-Kia Group joins an elite group of just three automotive manufactures (Toyota and a GM/Ford joint venture), which have designed, developed and built their own six-speed automatic transmissions.

Customer choice of 2WD and 4WD Drivetrains

New Sorento buyers can select from two advanced drivetrains (2WD or 4WD), to ‘best-match’ the on-road and off-road abilities of their new Kia vehicle to their individual lifestyle. The 2WD drivetrain offers lower weight (60 kg less than the 4WD system), and enhanced fuel economy and delivers good on-road traction, aided by the standard-fit TCS (traction control system) linked to the vehicle’s ABS.

For buyers who regularly face difficult driving conditions, tow trailers (weighing up to 2,500 kilos, depending on model) or go off-road, the 4WD drivetrain will be ideal.

This is a single ratio (High) 4WD system, with a default status that delivers 100% of engine torque to the front wheels during all routine city and highway driving. While in this two-wheel drive mode, fuel efficiency is enhanced compared to 4WD motoring. Whenever a front wheel loses grip a percentage of torque is automatically transferred to the rear wheels to maintain forward motion.

For improved traction and greater safety while driving in slippery conditions – such as rain, snow, mud, unpaved roads and off-road – the driver can manually select ‘Lock Mode’. This mode splits the torque 50/50 between the front and rear axles – for better stability and maintains that split up to a speed of 30 kph (18.5 mph).

Traction is also boosted by the available HAC (Hill-start Assist Control) which prevents slipping backwards, and DBC (Down-hill Brake Control) which limits vehicle speed to just 8 kph (5 mph) during steep descents.