Compact design. Heavy-duty performance.
The FONZON Rear Differential is precision-built to handle the demands of high-speed desert and rock racing. Featuring a blend of CNC-machined and powder metallurgy components, this differential delivers smooth helical gear engagement, consistent power delivery, and long-lasting durability—all in a compact, race-ready unit.
Features
- Powder metallurgy planetary gears for reliable strength in a compact form.
- All-helical gear design for smoother, quieter operation under load.
- Metal diff case (center housing) made from 7075-T6 aluminium alloy for high rigidity and low weight.
- CNC-machined nickel-chromium alloy steel bevel gear (helical teeth)(steel makeup#4340).
- CNC-machined nickel-chromium alloy steel drive bevel gear (helical teeth)(steel makeup#4340).
- Nickel-chromium alloy steel drive cups for impact resistance and longevity(steel makeup#4340).
- Grade 12.9 gold-colored, titanium-coated screws for corrosion resistance and secure assembly.
- Fully assembled and ready to install.
Fits
- Direct fit for the rear differential mounting position of the LOSI 1/10 REY platform. (Confirm gear mesh and axle alignment before installation.)
Please Note: Due to the unique internal design of LOSI’s stock differential, it uses grease instead of differential oil. For the latest BAJA REY 2.0 models (LOS03046 and LOS03049), please use FZCSREY01 instead.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
