GPM Racing 4140 Carbon Steel +7075 Alloy Front & Center & Rear Complete Differential for Traxxas 1/5 X-MAXX (TXM1251)
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
- 1/5
- Weight
- 620 g
About this product
Precision Differential Upgrade for X-MAXX
The GPM TXM1251 differential set is precision engineered with 4140 medium carbon steel gears and durable 7075 alloy components to enhance strength and component life in TRAXXAS X-MAXX 8S drivetrains. The complete differential gear assembly reduces backlash and supports higher torque loads while maintaining accurate gear mesh for improved drive consistency.
Packing includes
- Differential Gear Set – 18pcs
- Stainless Steel Washer 16x22x0.1 – 12pcs
- Diff Case – 3pcs
- Grade 12.9 Black Cap Head Screw 3×10 – 12pcs
- Grade 12.9 Black Round Head Screw 3×10 – 12pcs
- Rubber Sealing Ring 17×1 – 3pcs
- Differential Gear Spacers – 12pcs
- Diff Case Gasket – 3pcs
- Spider Gear Shafts – 6pcs
- Diff Bevel Gear 32T – 2pcs
- Front + Rear Pinion Gear 10T – 2pcs
- Bearing 15x24x5 – 2pcs
- Black Gasket – 2pcs
- Center Diff Input Gear 20T – 1pc
- Center Diff Output Gear 51T – 1pc
Original Name / Part No:
7880+7790+7881+7791+7796
Compatible Models
- TRAXXAS-1/5 X-MAXX 8S MONSTER TRUCK-77086-4
- TRAXXAS-1/5 X-MAXX 6S MONSTER TRUCK-77076-4
- TRAXXAS 1/6 4WD XRT 8S-78086-4
- TRAXXAS 1/5 X-MAXX Ultimate 8S-77097-4
- TRAXXAS 1/5 X-MAXX 8S MONSTER TRUCK-77096-4
- TRAXXAS 1/6 XRT Ultimate 8S 78097-4
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
