Suzuki Jimny Sumo Gear Transfer Case Gear Set 17% High Reduction Manual Transmission (05 - 18)

Suzuki Jimny JB43 2005-2018 Sumo 17% / 17% Transfer Box Reduction Gears - Manual

Upgrade the gearing of your Suzuki Jimny JB43 Generation 3 (2005-2018) with these high-quality Sumo 17% high-range and 17% low-range transfer box reduction gears, manufactured in Japan.

Designed for Suzuki Jimny JB43 models fitted with a 5-speed manual gearbox and electric push-button transfer box, this gear conversion helps compensate for larger diameter tyres while improving low-speed control and off-road performance.

Manufactured from high-quality billet material and precision-machined in Japan by an original equipment (OE) gear manufacturer, Sumo gears are designed with an emphasis on strength, reliability and smooth, quiet operation.

Providing a 17% reduction in both high and low range, this kit offers a moderate gearing upgrade for Jimny owners running larger off-road tyres without the extreme low-range reduction of more specialised rock-crawling gear sets.

IMPORTANT: Suitable for Suzuki Jimny JB43 2005-2018 models with a 5-speed manual gearbox and electric push-button transfer box only. Not suitable for automatic gearbox models or earlier lever-operated transfer boxes.

17% High Range Reduction

Fitting larger diameter tyres increases the effective overall gearing of a Suzuki Jimny, which can reduce acceleration and make the engine work harder when climbing hills or driving at lower speeds.

The Sumo 17% high-range reduction helps compensate for this change by lowering the transfer box gearing, providing improved mechanical advantage at the wheels.

• High-range reduction: 17%
• Transfer box: Electric push-button operated
• Recommended tyre size: 29"-30"

This reduction helps restore more suitable gearing for Jimnys fitted with larger off-road tyres.

Please note: High-range gearing is also used during normal road driving. This conversion will increase engine RPM at a given road speed compared with the original gearing when using the same tyre size.

17% Low Range Reduction

The Sumo gear kit also provides a 17% reduction in low range, improving low-speed control when driving off-road.

The lower gearing provides greater torque multiplication at the wheels, helping the Jimny negotiate difficult terrain at reduced speeds.

• Low-range reduction: Approximately 17%
• Recommended tyre size: 29"-30"

Benefits include:

• Improved low-speed off-road control
• Greater torque multiplication at the wheels
• Improved gearing for larger diameter tyres
• Better control on steep climbs and descents
• Reduced need to slip the clutch during technical off-road driving
• More controlled manoeuvring over uneven terrain
• Moderate gearing reduction suitable for everyday driving and recreational off-road use

Precision-Machined Japanese Sumo Gears

Sumo reduction gears are manufactured in Japan by an experienced OE gear manufacturer using high-quality billet material and precision machining processes.

Each gear is manufactured using modern machinery and tooling to achieve the accuracy required for reliable transfer box operation.

The emphasis on manufacturing quality is intended to provide:

• Strength and durability
• Reliable operation
• Accurate gear engagement
• Smooth, quiet running
• Consistent manufacturing quality

Ideal for 29"-30" Tyres

This Sumo reduction gear kit is recommended for Suzuki Jimnys running 29"-30" tyres.

When larger tyres are fitted, the effective gearing becomes taller, which can reduce the vehicle's available pulling power at the wheels.

By reducing both high-range and low-range gearing by 17%, this Sumo conversion helps compensate for the increased tyre diameter.

This makes the kit a practical choice for Jimny owners who want improved gearing for larger all-terrain or mud-terrain tyres without a substantial change to low-range gearing.

Features

• Manufactured by Sumo Gear
• Made in Japan
• Manufactured by an OE gear manufacturer
• Precision-machined from high-quality billet material
• 17% high-range reduction
• 17% low-range reduction
• Designed for smooth, quiet operation
• Improved gearing for larger diameter tyres
• Recommended for 29"-30" tyres
• Suitable for Suzuki Jimny JB43 Generation 3
• Designed for 5-speed manual gearbox models only
• Compatible with electric push-button transfer boxes
• Changes both high-range and low-range gearing

Specifications

• Manufacturer: Sumo Gear
• Country of manufacture: Japan
• Vehicle: Suzuki Jimny JB43 Generation 3
• Model years: 2005-2018
• Main gearbox: 5-speed manual only
• Transfer box type: Electric push-button operated
• Gear construction: Precision-machined billet material
• High-range reduction: 17%
• Low-range reduction: Approximately 17%
• Recommended tyre size: 29"-30" (approximately 736-762mm)

Vehicle Fitment

Designed specifically for the Generation 3 Suzuki Jimny JB43 fitted with a 5-speed manual gearbox and electric push-button transfer box.

• Suzuki Jimny JB43 - 2005-2018
• 5-speed manual gearbox only
• Electric push-button transfer box
• Chain-drive transfer box

IMPORTANT: This kit is for manual gearbox Jimnys with the electric push-button transfer box only. It is NOT suitable for automatic gearbox vehicles or earlier lever-operated transfer boxes.

Please check both your main gearbox and transfer box type before ordering, particularly on vehicles near the changeover period or those fitted with replacement transfer boxes.

Installation Information

Installation requires removal and dismantling of the transfer box to replace the original gearing.

As installation involves internal transfer box components, professional installation or experience with transfer box rebuilding is recommended.

Installation Instructions:

Instructions Click Here

Please note: The linked instructions are supplied by Trail-Gear for their Jimny electric push-button transfer box gear conversion. They are provided for general transfer box dismantling and assembly reference only and are not specific Sumo installation instructions. Follow the correct installation requirements for the Sumo kit.

Important Information

• Suzuki Jimny JB43 2005-2018 only.
• 5-speed manual gearbox models only.
• Electric push-button transfer boxes only.
• Not suitable for automatic gearbox vehicles.
• Not suitable for earlier lever-operated transfer boxes.
• High-range gearing reduced by 17%.
• Low-range gearing reduced by approximately 17%.
• Both high-range and low-range gearing are changed by this conversion.
• Recommended for vehicles running 29"-30" tyres.
• Manufactured in Japan by Sumo Gear.
• The linked Trail-Gear installation instructions are provided for reference only and are not specific to this Sumo kit.
• Professional installation or experience rebuilding transfer boxes is recommended.

Please confirm your vehicle is a Suzuki Jimny JB43 with a 5-speed manual gearbox and electric push-button transfer box before ordering.