GPM Racing Aluminium Front/Rear Gearbox Cover - 5pcs Set for Traxxas 1/10 TRX4 (TRX4012A)
We are the importer of record — the price you see is the price you pay.
Handled by us in the UK under the Consumer Rights Act — no sending it overseas.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
Key Specs
- Scale
- 1/10
- Weight
- 33 g
About this product
Precision CNC gearbox covers for TRX4 applications
This CNC-machined 5pc aluminium front and rear gearbox cover set is engineered for use with the TRAXXAS TRX4 Trail Crawler and carries model designation TRX4012A. The parts are intended to increase gearbox rigidity and protect the differential housing during demanding trail use.
Manufactured from 6061-T6 aluminium with high precision tolerances, the components deliver improved chassis stiffness and consistent differential alignment. An integrated oil filler port enables controlled lubrication access for routine maintenance and setup checks.
Installation requires removal of the stock covers, accurate placement of the aluminium pieces and securing with the supplied stainless steel cap head screws. These upgrade parts provide a durable reinforcement to limit gearbox flex under crawling loads and impacts.
Packing includes
- Stainless Steel Cap Head Screw 2.5×16 – 4pcs
Specifications
- Item Front/Rear gearbox cover set, 5pcs
- Material Aluminium 6061-T6
- Model Number TRX4012A
- Compatibility TRAXXAS TRX4 TRAIL CRAWLER
Specify the TRX4012A covers when seeking a precision, CNC-machined aluminium upgrade to protect and stabilise the gearbox area on TRAXXAS TRX4 Trail Crawlers.
What machining tolerances are targeted?
The covers are produced with tight CNC tolerances to ensure repeatable fitment and to minimise differential misalignment under load.
Are the parts anodised or raw finish?
Surface finish can vary by batch; verify the product listing for current finish details before ordering.
Can these covers reduce drivetrain lash?
By stiffening the gearbox housing and maintaining alignment, they can help reduce excess lash originating from flex under load.
What fasteners are supplied?
The kit includes four stainless steel 2.5×16 cap head screws for secure mounting to the stock gearbox. Write Product Review Please sign in your account before you can write any review.
Made to order: GPM Racing parts are shipped to us from GPM’s factory, so please allow around 14 days for dispatch.
What our customers say
A selection of recent five-star reviews, as written.
-
★★★★★
Ordered flishrc cobra. Communication was great. Ordered larger batteries but they were the wrong size. Olly shipped the right batteries and gave a refund for the difference I paid. Couldn't ask for more. Thanks for the help with the order.
Robert, 22 September 2026
-
★★★★★
Very helpful when the vehicle I wanted wasn't in stock. Very fast deliver too.
Anna Abbott, 17 September 2026
-
★★★★★
Excellent service speedy delivery and good customer service
GLYN, 10 September 2026
-
★★★★★
Great product and service. I enjoy buying from these guys. Thanks to radio-controllled.co.uk.
Paul Jordan, 3 September 2026
-
★★★★★
Dealt with customer services over an order I accidently placed, they were prompt and dealt with it will, completely refunded within a small window of time, thanks!
Oliver Galustian, 23 July 2026
-
★★★★★
Really good online rc store with some great products and sales on. The owner is very knowledgeable as well.
Simon, 19 July 2026
-
★★★★★
Product delivered promptly and in excellent condition 👍had very helpful and prompt responses from Olly to all my questions, I will definitely be using them again 👍
Mark Clucas, 30 January 2026
-
★★★★★
The customer service and advice were first class!
Steve Avery, 9 September 2025
-
★★★★★
The seller knew I was after one and very kindly informed me when they came back into stock so now have a Flywing Bell 206. Fantastic bit of kit. Well worth the wait.
Pete Goddard, 15 April 2025
-
★★★★★
Great service, car arrived fast and really well packaged. Also, I had a little problem....(which turned out to be me doing it wrong) but someone replied the same evening! Will definitely be buying from them again.
Graham Rousseau, 10 February 2025
