Parts/Radio & control/Servos/EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo For TRX-4 & TRX4-M
EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo For TRX-4 & TRX4-M
EcoPower

EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo For TRX-4 & TRX4-M

Part # ECP-640T3.6(34)
Where to buy
$29.99
AMain Hobbies
Seen Oct 12, 2026
$29.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

The Ecopower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo is an incredibly powerful sub micro option developed to provide a more rugged upgrade for the Traxxas TRX-4. Also, when paired with the Samix TRX-4M Brass Servo Mount (SAMTRX4M-4068 - Sold Separately), this makes a great upgrade for the Traxxas TRX-4M. But, this servo is a great upgrade for any sub micro servo application! Lifetime Gear Warranty through Amain Hobbies for added confidence and durability.

Delivering 64 oz-in of torque and .09 transit speed at 6.0V, the 640T will operate at a level that makes other sub micro servos feel inadequate in comparison. The servo features an all metal gear train for durability and waterproof circuitry that will stand up to the elements. So if you're tired of your small servos delivering small performance and want to try something with more muscle, step up to a 640T and shift performance into high gear.


SIZE NOTE: The 640T is not an exact physical copy of the 2065 and is a few millimeters taller, and may not work in all other applications where the 2065 is used. Please see the Compatibility tab for verified model compatibility.

TRX-4M NOTE: This servo is only compatible with the TRX-4M when using the optional Samix Brass Servo Mount (SAMTRX4M-4068 - Sold Separately).

 

Features:
  • Lifetime Gear Warranty Backed by Amain Hobbies
  • Direct replacement for Traxxas 2065 sub micro servo (TRA2065)
  • Powerful TRX-4 Dig/Shift servo upgrade
  • Suitable for other sub micro servo applications
  • Waterproof up to 1 meter
  • 64 oz-in of torque and .09 transit speed @ 6.0V
  • Digital circuitry
  • Cored motor
  • Metal gears
  • 315mm servo lead
  • Includes plastic 4 way, dual, and single arm servo horns and mounting hardware
  • 1 Year warranty against manufacturer defects*
*NOTE: Warranty does not cover stripped gears or damage caused by abuse.

Specifications:
Operating Voltage: 4.8-6.0V
Operating Speed: .09 @ 6.0V
Dynamic Torque: 64 oz in @ 6.0V (4.6kg cm)
Weight: 13 grams
Output Shaft: 25T
Motor Type: Cored
Wire Length: 315mm
Dimensions: 23.5x12.50x25mm (30mm tall @ output)

NOTE: Be sure to set your End Point Adjustments when using this servo to ensure long life and performance. For more information on End Point Adjustments, please watch the video below.


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...

Reviews3.6 · 34 reviews

Thane Jeffrieson EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo

I needed a replacement after my stock servo stop working. The 640T fits nicely and seems to be strong. My truck shifts smoothly and effortlessly now. I have only run it a few times, but I would recommend this servo to anyone needing a shifting servo.

10 found this helpful
Jose VazquezVerified owneron EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo

I just installed two of them. The first impression is much better than stock TRX-4 microservos. Double torque and speed, seem more durable.

5 found this helpful
Chad HarknessVerified owneron EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo

BOUGHT 3 OF THESE FOR MY TRX 4 BRONCO, GREAT LITTLE SERVOS AND CANT BEAT THE PRICE. EXCELLENT UPGRADE!!!

5 found this helpful
James Masonon EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo

Bought one to use in my TRX-4. Its faster and stronger than the stock servo which died after about 2 weeks of light use. Since I bought it I've been out more driving my truck in the creek with this while its been raining and snowing and no problems at all. It doesnt get hot like the stock servo did. Great servo

4 found this helpful
Andrew RosenfeldVerified owneron EcoPower 640T 13g Waterproof Metal Gear Digital Sub Micro Servo

Overall I would recommend these servos as great replacements for the stock TRX-4 diff and trans servos they are much stronger and do better with water. I purchased three of these on March 7th 2020 and six months later one has began to fail while the other two are still working strong. Keep in mind I spend most of my time driving up streams and once in a while sinking it in deep sections... I'll be buying a replacement!

3 found this helpful
What reviewers say

Reviews of the EcoPower 640T sub micro servo are sharply divided. Many buyers, mostly on TRX-4 and TRX4-M trucks, report it is stronger and faster than stock Traxxas micro servos and has held up for a year or more, including in wet conditions. Others report early failures, dead-on-arrival units, water ingress through the wire grommet, slow or weak performance, and fit problems on the TRX4M, Latrax and mini B. Several reviewers say the Amain customer service handled replacements well. Multiple reviewers recommend Savox or other brands for true waterproofing. Fit is described as requiring modification on some chassis.

  • + Stronger and faster than stock Traxxas micro servos
  • + Metal gears and good value for the price
  • + Long service life reported by some owners
  • + Responsive replacement service from the seller
  • − Early failures and dead-on-arrival units reported
  • − Water ingress through wire grommet
  • − Fit issues on TRX4M, Latrax and other chassis
  • − Slow speed or weak centring on some units
Summary generated from the reviews above.

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