Fonzon 39/12T Full Metal Split Fr/Rr Diff - Arrma 8S Series
FONZON 39/12T FULL METAL SPLIT FR/RR DIFF - ARRMA 8S SERIES
Designed for brute power and precision control.
The FONZON Front/Rear Differential for ARRMA 8S vehicles is built to handle the extreme torque and stress of col-lg-scale bashing. With fully CNC-machined internals and a premium aluminum housing, it ensures smooth power delivery, long-term durability, and easy drop-in installation.
Whether you're pushing the limits in off-road mayhem or upgrading for drivetrain reliability, the FONZON 8S Front/Rear Differential is ready to deliver unmatched performance and confidence.
Features
- All gears CNC-machined from nickel-chromium alloy steel for maximum strength(steel makeup#4340).
- Helical gear design for smoother engagement and quieter operation under load.
- Metal diff case (center housing) crafted from 7075-T6 aluminum alloy for superior rigidity and reduced weight.
- Grade 12.9 corrosion-resistant screws ensure long-lasting assembly integrity.
- High-quality matched drive cup bearings provide stable, efficient rotation.
- Factory pre-filled with 100K cSt differential oil.
- Fully assembled and ready to install – no setup required .
Fits
Direct fit for ARRMA 8S platform models, including but not limited to:
- Kraton 8S
- Outcast 8S
- EXB Series 8S Models
Delivery
All items available for purchase are displayed with estimated despatch times, these dates are based on the product stock status and processing time.
We use two main status's we use on items,
IN STOCK - These items will ship same day if ordered before 2.30pm
AVAILABLE TO ORDER - These items aren't available for same day despatch and will take a day or two to be despatched.
If your order contains both IN STOCK and AVAILABLE TO ORDER items, the entire order will ship as one once all items are available.
Courier options are displayed at the checkout and will effect delivery times once your order is despatched. All transit times are estimates and based on our couriers advised average delivery times.
 We offer free delivery to most Mainland UK addresses on orders over £125. Deliveries to any off-shore islands, international addresses and certain parts of Scotland/Highlands may incur delivery surcharges. These charges will depend on your postcode and the product(s) you are purchasing, examples shown below. Please contact us to clarify costs prior to purchasing if you are unsure. If you place an order and a delivery surcharge is required, a member of our team will be in contact by e-mail or phone.
- Eire
- Highlands of Scotland
- Isle of Wight
- Isle of Man
- Northern Ireland
- Scottish Islands & Channel Islands
- Republic of Ireland
- EU CountriesÂ
In addition to a surcharge, deliveries to the above destinations may take an extra day or two for completion.
Collections
If you choose to collect your order, please note the stock status as this will determine if your order will be able to be collected immediately or may be ready in a day or two. We will contact you via email when your order is ready to be collect. Please wait until you have been informed your order is ready to collect before visiting us to avoid disappointment.
Returns
If for any reason you are dissatisfied with your purchase, we offer a 30 day money back guarantee on all our items that are UNUSED and in their original packaging. Should you receive an item from us that you believe to be faulty, please contact us first to allow us to confirm / diagnose the fault and in many cases we can provide an immediate solution.
All refunds are at our discretion and will only be issued once we have received the returned item(s) and are satisfied that they are in unused condition. We advise that all returned items should to be sent recorded / signed for and insured to the correct product value as Make It Build It cannot be held responsible for returned items that are lost or damaged in transit. Please be aware that any refunds will not include your return postage cost.
If you wish to return any item(s) please contact us first at enquiries@makeitbuildit.co.uk. When shipping your item, please ensure your order number is displayed on the return packaging and included with the item inside the returned packaging. This will ensure that your return is dealt with in a prompt manner.
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For more information on our returns policy please see our Terms & Conditions | Make It Build it
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Payment & Security
Payment methods
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