Losi 2.19:1 Retro Fit Transmission Case

Part No: JCS-0177

Product Overview

The much-overdue and highly anticipated 2.19:1 Retro Fit Team Losi transmission brings modern performance to your vintage JRX vehicles

Compatible with both original XX internals and JC Racing's ever-expanding range of Losi upgrade components, the Retro Fit offers unrivalled flexibility for racers and collectors alike. Mix and match components to your heart's content and build the transmission setup that best suits your needs.

Designed to fulfil everybody's build needs

• Direct fit for original moulded pocketed chassis
• Direct fit for JC Racing carbon pocketed chassis
• Fits original flat JRX non-pocketed chassis with a 1mm clearance shim
• Fits original flat JRX non-pocketed chassis without a shim, requiring only minor modifications to the underside flats of the gearbox case, as highlighted in the accompanying image above

Key Features & Specifications

• Manufactured to original specifications
• Precision injection-moulded Nylon 6
• JC Racing detailing for an authentic race look
• Designed and manufactured in the UK
• Supplied as a case only
• Designed primarily for metric screws but imperial hardware can be used
• Colour: Black only

Losi Release History

JRX2

Release Date: 1988

Key Features

• Graphite chassis
• 5-link rear suspension
• Real rubber tyres
• Low rotating mass transmission

Notes

The buggy that started it all for Team Losi. The JRX2 introduced an innovative 5-link rear suspension, setting it apart from competitors at the time.

Unlike the Associated RC10, which featured a stamped aluminium chassis, the JRX2 was supplied with a graphite plate chassis, highlighting Losi’s early focus on performance and lightweight design.

This original platform went on to form the basis for three additional buggy variants and three trucks, establishing the foundation of the Losi racing lineup.

TEAM LOSI HISTORY

JRX2-Pro

Release Date: 1990

Key Features

• Longer graphite chassis
• H-arm rear suspension
• Long front and rear shocks

Notes

The JRX2-Pro was the direct evolution of the JRX2. It introduced longer front shocks, a design direction that was later reversed in subsequent models.

The original 5-link rear suspension was replaced with a solid H-arm, improving durability and consistency. Additional updates included a revised two-piece battery holder, stronger steering bellcranks, and a move from spoked wheels to solid wheels featuring the Team Losi logo.

JRX2-Pro SE

Release Date: 1992

Key Features

• Molded composite chassis
• Revised shock towers
• Slipper transmission
• Swept front suspension arms

Notes

The JRX2-Pro SE built upon the Pro platform with significant updates. Most notably, it introduced new swept composite front arms, improved shock towers, and a slipper transmission.

Later versions were also supplied with the retrofit XX transmission. The molded composite chassis offered two wheelbase options and should not be confused with the Junior 2 chassis—it is a different composite design with additional rear mounting holes to accommodate the extended wheelbase.

This model also featured revised shock cartridges, further improving suspension performance.

Junior 2

Release Date: 1990

Key Features

• Moulded composite chassis
• Plastic shock towers
• Bushings in place of bearings

Notes

The Junior 2 was Team Losi’s first lower-cost buggy kit, designed to make competitive RC racing more accessible.

It introduced Losi’s first molded plastic chassis, replacing the flat graphite plates used in earlier models. Cost savings were achieved through the use of plastic shock towers, bushings instead of full bearings, and simple threaded-rod linkages.