Suzuki Jimny Sumo Gear Transfer Case Gear Set 77% Low Reduction Manual & Auto Transmission (05 - 18)

Suzuki Jimny 2005-2018 Sumo 77% Low Range Transfer Box Reduction Gears - Manual & Automatic

Improve the off-road capability of your Suzuki Jimny Generation 3 (2005-2018) with this premium Sumo 77% low-range transfer box reduction gear kit, designed for Jimnys fitted with the later electric push-button transfer box.

This kit is suitable for both 5-speed manual and 4-speed automatic gearbox models with the compatible electric push-button transfer box.

Unlike reduction gear kits that alter both high and low range, this Sumo conversion changes low-range gearing only, providing significantly lower gearing for technical off-road driving while retaining the original high-range gearing for normal road use.

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

IMPORTANT: Suitable for manual and automatic gearbox Jimnys with the electric push-button transfer box only. Not suitable for earlier lever-operated transfer boxes.

Factory High Range Gearing Retained

This Sumo gear kit retains the original high-range gearing, making it an excellent choice for Jimny owners who are happy with their existing road gearing but require substantially lower gearing when driving off-road.

Because high range remains unchanged, the transfer box conversion does not alter the vehicle's original high-range gearing.

• High-range reduction: 0% - factory gearing retained
• Automatic gearbox high-range ratio: 1.320:1 - unchanged

Please note: The 1.320:1 ratio quoted above is the supplied automatic gearbox specification. The original high-range ratio for manual gearbox models remains unchanged.

77% Low Range Reduction

The substantial 77% low-range reduction provides significantly lower gearing for demanding off-road conditions, allowing the Jimny to travel at much slower speeds while maintaining improved torque multiplication at the wheels.

This makes the kit particularly suitable for rocky terrain, steep climbs, deep ruts and other situations where precise low-speed control is essential.

• Low-range reduction: Approximately 77%
• Automatic gearbox modified low-range ratio: 4.690:1
• Recommended tyre size: 29"-30"

The 4.690:1 low-range ratio is the supplied automatic gearbox specification. Manual gearbox models retain their original high-range ratio and receive the low-range reduction provided by the compatible Sumo gear conversion.

Benefits include:

• Significantly improved low-speed off-road control
• Greater torque multiplication at the wheels in low range
• Improved control on steep climbs and descents
• Reduced need for clutch slipping during technical driving on manual gearbox models
• Better low-range gearing for larger diameter off-road tyres
• More controlled manoeuvring over rocks, ruts and difficult obstacles
• Original high-range gearing retained for normal road driving

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.

The gears are produced 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 low-range reduction kit is recommended for Suzuki Jimnys running 29"-30" tyres.

Larger diameter tyres increase the effective overall gearing, which can make technical off-road driving more difficult at low speeds.

By providing a substantial low-range reduction, this kit helps compensate for the taller gearing associated with larger tyres when the vehicle is operating in low range.

Because high range remains unchanged, this kit does not compensate for larger tyres during normal high-range road driving.

Features

• Manufactured by Sumo Gear
• Made in Japan
• Manufactured by an OE gear manufacturer
• Precision-machined from high-quality billet material
• 77% low-range reduction
• Original factory high-range gearing retained
• Designed for smooth, quiet operation
• Improved crawling capability for demanding off-road terrain
• Recommended for vehicles running 29"-30" tyres
• Suitable for 5-speed manual gearbox Jimnys
• Suitable for 4-speed automatic gearbox Jimnys
• Designed for electric push-button transfer boxes
• Includes replacement low gear and idler gear

Specifications

• Manufacturer: Sumo Gear
• Country of manufacture: Japan
• Vehicle: Suzuki Jimny Generation 3
• Model years: 2005-2018 (subject to transfer box type)
• Main gearbox: 5-speed manual or 4-speed automatic
• Transfer box type: Electric push-button operated
• Gear construction: Precision-machined billet material
• High-range reduction: 0% - factory gearing retained
• Low-range reduction: Approximately 77%
• Automatic high-range ratio: 1.320:1 - unchanged
• Automatic modified low-range ratio: 4.690:1
• Recommended tyre size: 29"-30"

Kit Contents

This Sumo low-range reduction gear kit includes:

• 1 x Low Gear - Jimny Type 5
• 1 x Idler Gear - Jimny Type 5

Please note: The kit contents listed above are the components specified by Sumo. Additional installation consumables, seals or gaskets are not listed as included.

Vehicle Fitment

Suitable for Suzuki Jimny Generation 3 models fitted with either a 5-speed manual or 4-speed automatic gearbox and the electric push-button transfer box.

• Suzuki Jimny - 2005-2018
• 5-speed manual gearbox
• 4-speed automatic gearbox
• Electric push-button transfer box

IMPORTANT: This kit fits both manual and automatic gearbox Jimnys. It is NOT suitable for vehicles fitted with the earlier manual lever-operated transfer box.

Please check your vehicle's transfer box type before ordering, particularly on vehicles near the model changeover period or those fitted with replacement transfer boxes.

Installation Information

Installation requires removal and dismantling of the transfer box to replace the original low-range gearing with the supplied Sumo reduction gears.

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

• Suitable for both 5-speed manual and 4-speed automatic gearbox models.
• Electric push-button transfer boxes only.
• Not suitable for earlier lever-operated transfer boxes.
• Low-range gearing reduced by approximately 77%.
• Original factory high-range gearing remains unchanged.
• Recommended for vehicles running 29"-30" tyres.
• Manufactured in Japan from precision-machined billet material.
• Kit includes the replacement low gear and idler gear.
• Additional installation consumables may be required.
• Professional installation or experience rebuilding transfer boxes is recommended.

Please confirm your vehicle has the electric push-button transfer box before ordering.