Parts/Drivetrain/Differentials & diff parts/Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)
Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)
Samix

Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

Part # SAMTRX4-40754.8(6)
Where to buy
$42.99
AMain Hobbies
Seen Oct 12, 2026
$42.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

Samix Traxxas TRX-4 Brass Differential Covers are machined from heavy brass material and add a total of 60 grams of unsprung weight to the front or rear axle housing. 

Features:

  • Machined Brass 
  • Black coated with gold etching
  • Adds 60g of total weight to the axle 
  • Use in the front or rear
  • Increases durability and strength
CA Residents Prop 65 Warning WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov Details...

Reviews4.8 · 6 reviews

Mike DillonVerified owneron Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

this is very nicely made. does not interfere with the locker system

Yi Chen HsiehVerified owneron Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

Nicely built but interferes my aftermarket skip plate underneath. I had to bend the skid plate a little to fit the cover.

JoeVerified owneron Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

Quality and weight feel incredible. Looks great and is a great upgrade over the stock diff cover.

Anthony WoodruffVerified owneron Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

Installation is flawless and drops in right where the OEM cover comes off, good low weight. High quality machining.

Louis CominielloVerified owneron Samix Brass Differential Cover for Traxxas TRX-4 (Black) (60g)

Really impressed with the machining of these, perfect fit which is very nice. Adds a good amount of weight, wish I would have bought the SAMTRX4-4063-8 to widen it at the same time, they are the perfect compliment to it.

What reviewers say

Six reviews, all for the black 60g brass differential cover for the Traxxas TRX-4, average about 4.8 out of 5. Reviewers consistently praise the machining, finish and fit, and most say it drops in where the stock cover sits without interfering with the locker. One reviewer notes it adds noticeable weight and another mentions a wider-axle pairing they wished they had bought. One owner reported it clashed with an aftermarket skid plate and needed the plate bent slightly. One reviewer has not yet installed it and judged it from unboxing only.

  • + High-quality machining
  • + Good fit at stock cover position
  • + Does not interfere with locker
  • + Attractive finish
  • − Clashes with aftermarket skid plate
  • − Adds noticeable weight
Summary generated from the reviews above.

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