Traxxas Trx-4 Defender Aluminum Alloy Front / Rear Gearbox Differential Lock Servo Installation Instead Of Accessory # 8240 - Parts & Accs - AliExpress
Amazon.com: GPM For Traxxas TRX-4 Trail Defender Crawler/TRX-6 Merc-Benz G63 Upgrade Parts Aluminum Front and Rear Gear Box 2-Speed Diff Lock Servo Mount - 1Pc Set Red : Toys & Games
TRAXXAS TRX4 TRAIL CRAWLER Aluminum Servo Horn W. Built-in Spring (For Locking Differential ) - 4pc set - GPM TRX4025T/S