GPM Racing 4140 Steel + 7075 Alloy Front/Rear Complete Differential 13/43T/1.0 Mod for Losi Team Losi 1/8 LMT 4WD Solid Axle Monster Truck (LMT1343S)

Aftermarket replacement differentials for LOSI LMT

The LMT1343S front and rear complete differential assemblies are designed as aftermarket replacements for LOSI LMT solid axle monster truck kits and RTR models. Components are pre-assembled and combine 4140 steel with 7075 alloy parts, and the package includes the internal helical gears plus a 13T pinion gear. The assemblies are intended for drivetrain maintenance, repairs, or upgrades where direct-fit aftermarket parts are required.

Design notes: the gearset uses a 10T driving gear and a 43T driven gear at a 1.0 module to maintain LOSI gear geometry. Critical load paths use 4140 steel and 7075 alloy to balance durability and weight. Differential oil is not included, so fill the units during installation following LOSI guidance or your preferred setup.

Installation advice: verify final alignment and torque on your chassis despite pre-assembly. Consider replacing both front and rear to preserve matched wear and gear mesh. Use a medium-strength thread locker on external fasteners and set gear lash carefully to avoid premature wear.

Compatible Models

• LOSI 1/8 LMT 4WD Solid Axle Monster Truck-LOS04022
• LOSI 1/8 LMT 4WD Solid Axle Monster Truck-LOS04021
• LOSI 1/8 LMT 4WD Solid Axle Mega Truck Brushless-LOS04024
• LOSI 1/10 TLR Tuned LMT 4WD Solid Axle Monster Truck KIT-LOS04027
• LOSI 1/8 LMT 2.0 Grave Digger 4X4 Solid Axle Brushless Monster Truck-LOS04028

For LOSI LMT owners needing a direct-fit aftermarket differential, the LMT1343S assemblies offer pre-assembled front and rear units in 4140 steel and 7075 alloy; follow LOSI recommendations for oil, torque, and matched replacement of both ends when appropriate.

Which LOSI kits are listed as compatible?

Compatibility is shown in the list above and includes LOS04022, LOS04021, LOS04024, LOS04027, and LOS04028. Always verify your vehicle’s part numbers before ordering.

Is lubrication provided with the assemblies?

No lubrication is supplied. Add differential oil during installation to achieve the desired internal characteristics as per LOSI guidance or your setup preferences.

What are the internal gear specs?

The internal gearset comprises a 10T driving gear and a 43T driven gear at a 1.0 module, and a 13T pinion is included in the package.

Do these units require setup out of the box?

They arrive pre-assembled but require oil fill, fit verification, and final torque checks. Adjust gear mesh and retorque fasteners after initial running to ensure reliability.

Should I replace front and rear at the same time?

For balanced wear and consistent gear engagement across the driveline, replacing both front and rear with matching sets is recommended.

What materials are used for load-bearing parts?

Load-bearing components and housings are built from 4140 steel and 7075 alloy to provide improved wear resistance while controlling mass compared with typical stock castings. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.