Differential service

Gaterunner 2WD kit40144, rear axle differential only.

Start with the correct reference

Rear differential assembly drawing. The center drivetrain is a spool; this reference does not establish a center differential.

Rear differential assembly, PDF p. 11 (opens in a new tab)
Assembly drawing · Gaterunner40144 kit manual
An assembly drawing shows the components; it does not provide a complete service sequence.

Parts, tools and consumables

Listed in the reference

Black grease or a thin coating of 500k cSt differential fluidconsumable
Alternative suggestions for the rear differential assembly; not two mandatory replacements.
Requirement source, PDF p. 11 (opens in a new tab)

Part links open an exact-model OEM listing. Quantities, reused hardware and condition-dependent replacements may need checking in the manual. A listed part is not an instruction to replace it.

Setup specifications

Differentials: Spool center, open rearStock
Sources
Source 1: img2c.associatedelectrics.com (opens in a new tab)
Source 2: 60years.associatedelectrics.com (opens in a new tab)

Keep the axle positions and original units shown. Values describe the cited configuration. Replacement-derived and community figures keep their stated basis.