SKU: 52625572573

Fonzon ARRMA Grom Rear Differential Pinion Set Aluminium FZCSGRR01

$38.70 $43.00
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Description

Fonzon ARRMA Grom Rear Differential Pinion Set Aluminium FZCSGRR01The Fonzon FZCSGRR01 ARRMA Grom Rear Differential and Pinion Set is a fully assembled rear drivetrain upgrade designed for compatible ARRMA Grom vehicles needing stronger gearing, smoother power transfer, and improved durability under high load driving. Features Fully Assembled Rear Diff Set: Supplied factory assembled with rear differential and input pinion for faster installation 7075 T6 Aluminium Case: Lightweight aluminium differential case

The Fonzon FZCSGRR01 ARRMA Grom Rear Differential and Pinion Set is a fully assembled rear drivetrain upgrade designed for compatible ARRMA Grom vehicles needing stronger gearing, smoother power transfer, and improved durability under high-load driving.

Features

  • Fully Assembled Rear Diff Set: Supplied factory assembled with rear differential and input pinion for faster installation
  • 7075-T6 Aluminium Case: Lightweight aluminium differential case provides a strong housing with an excellent strength-to-weight ratio
  • Steel And Powder Metallurgy Gears: CNC-machined nickel-chromium alloy steel and powder metallurgy gears support durable power transfer
  • Heavy-Duty Gear Design: Drive bevel, planetary, and ring gears are designed to handle increased torque and demanding terrain
  • Pre-Filled Diff Oil: Supplied filled with 3K cSt silicone differential oil for smooth and consistent operation
  • Sealed Adapter Cup Bearings: High-quality sealed bearings help support efficient drivetrain rotation
  • Grade 12.9 Screws: Titanium-coated screws provide strong and corrosion-resistant assembly hardware
  • Grom Drivetrain Upgrade: Suitable for strengthening the rear differential assembly on compatible ARRMA Grom models

Specifications

  • Brand: Fonzon
  • Part Number: FZCSGRR01
  • Product Type: Rear differential and input pinion set
  • Application: Rear differential upgrade for compatible ARRMA Grom vehicles
  • Diff Oil: 3K cSt silicone oil
  • Case Material: 7075-T6 aluminium
  • Gear Material: Steel and powder metallurgy
  • Gear Type: Drive bevel, planetary, and ring gears
  • Bearings: Sealed adapter cup bearings
  • Hardware: Grade 12.9 titanium-coated screws
  • Assembly: Fully assembled and ready to install

Compatibility

  • ARRMA Gorgon Grom
  • ARRMA Granite Grom
  • ARRMA Mojave Grom
  • ARRMA Quake Grom
  • ARRMA Typhon Grom

Includes

  • 1 x Fonzon ARRMA Grom 7075-T6 aluminium assembled rear differential and pinion set with steel gears

FAQ

Is the Fonzon FZCSGRR01 differential already assembled? Yes. The Fonzon FZCSGRR01 rear differential and pinion set is supplied fully assembled and ready to install.

What diff oil is included in the Fonzon FZCSGRR01? The Fonzon FZCSGRR01 differential is pre-filled with 3K cSt silicone differential oil.

What ARRMA vehicles does this rear differential suit? The Fonzon FZCSGRR01 rear differential is designed for compatible ARRMA Grom vehicles, including Gorgon Grom, Granite Grom, Mojave Grom, Quake Grom, and Typhon Grom models.

Is this a genuine ARRMA part? No. The Fonzon FZCSGRR01 is an aftermarket drivetrain upgrade made by Fonzon for compatible ARRMA Grom vehicles.

Does this include the input pinion? Yes. The Fonzon FZCSGRR01 set includes the rear differential assembly with input pinion.

Important Notes

  • This is an aftermarket Fonzon upgrade part, not a genuine ARRMA factory spare part.
  • Check your ARRMA Grom manual, exploded diagram, and drivetrain layout before fitting to confirm rear differential compatibility.
  • This listing is for the rear differential and pinion set only. Vehicle, diff housing hardware outside the supplied assembly, tools, and other drivetrain parts are not included.
  • After installation, check gear mesh, drivetrain movement, and screw tension before running the vehicle.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 52625572573

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4.4 ★★★★★
Based on 19 reviews
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Mahera
Lake Worth, US
★★★★★ 5
Perfect fit for our 2018 X5 35D
Perfect fit. Never replaced a filter in this car before and took me only 13 minutes. I timed it lol. That includes taking some before and after pictures from the old and new filter. What is worth mentioning is that the car was until now under the “fake maintenance” from BMW that comes with a new car and goes until 36.000 miles. Up to this mileage there is no other service the. The oil changes (3) due. The first real checkup is at a higher mileage and not covered anymore. Anyway , those filters where replaced before from a BMW dealership. When I compare the new filters and the filters I took out of the car they look the same. I was expecting to find some BMW marks on the installed filter but perhaps they don’t put their name in it anymore??? Or it could be they also put “after market” parts in. Anyway, BMW quoted me in all seriousness 700 dollar to replace those filters and the Inside filter The inside filter is on its way and is 25 dollar. Together with those filters the parts came to 55 dollar and I guess a total of 30 minute of work. Well done BMW, lol. We all need to make a living buy that should be considered “robbery” Anyway, if you thinking about replacing those filters then go for it. It’s not complicated and all you need is a screw driver to get one plastic river out that you can push back in once you are done. Those filters here from MANN are the real deal and fit perfectly and state that they are made in Germany. I have no reason not to believe it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2020
M
Verified Purchase
Mikkitorrentino
Lowell, US
★★★★★ 5
Excellent Product
It works really well. I used it on quarter tank and drove about 6 miles then filled up with top tier gas and my MPG went up by 3 miles on Highway and about 2 MPG city driving. At first there may be slight hesitation as it clears carbon. Then runs smooth as silk.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
G
Verified Purchase
Goleta
Charlottesville, US
★★★★★ 5
Quality product
Seeing as it passed the smog test without any issues, it seems this product worked exactly as intended.
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Reviewed in the United States on May 20, 2026
M
Verified Purchase
Melodie G Cross
Louisville, US
★★★★★ 5
So far so good
It seems to be working well, so far. The check engine light turned off and the my vehicle seems to be running well. Be sure to follow the instructions. A while back, I wasted some money on a different catalytic converter cleaner because I put the cleaner in on a full tank of gas. It's best to wait until you're at a half tank or less of gasoline before you put in your catalytic converter cleaner. Also, I drove around right after I put in the catalytic converter cleaner and before I filled up my tank again. A couple of days later, I went to the gas station and topped off my tank. Again, it seems to be running well for now.
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Reviewed in the United States on April 21, 2026
C
Verified Purchase
ckanchola
Phoenix, US
★★★★★ 4
Works ok for some stuff.
I tried this mainly to clean my cats. It sadly didn't work for that at all. It did however work great as a basic fuel system cleaner. It smoothed out my idle and cleaned my O2 sensors they were a bit lazy before using this product now they switch fast like they are supposed too. In terms of my recommendation I say use as a fuel system cleaner. Or if your cats aren't too clogged in my case I bought an old neglected used car that likely had that problem for years. So I don't think any pour in tank cleaner would work in my case. However if your car just started having cat issues. This might work?? I think it's worth a try at least and isn't much more expensive than a basic fuel system cleaner so why not?
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Reviewed in the United States on May 16, 2026

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