Bimmerworld DCT Overfill/Dry Break Kit BMW E9X M3 F8X M2/M3/M4
Product Description
Solve DCT Shift Issues Under Track G-Forces
On track, even with the factory fluid level, the BMW DCT transmission can suffer from slow shifts, mis-shifts, and fault codes due to insufficient oil circulation under sustained lateral G. We’ve experienced this first-hand in both street and full-race M3/M4 builds.
The solution is simple and effective: overfilling the DCT by 1 litre of fluid ensures proper oil coverage inside the transmission, keeping shifts sharp and reliable even in the most demanding conditions.
Motorsport-Derived GT4 Solution
This system borrows directly from the BMW M4 GT4 factory design. Instead of attempting to overfill through the side of the transmission (where fluid immediately runs out), the dry-break allows you to:
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Pump in an extra 1 quart (0.95L) of fluid after factory-level fill.
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Quickly and cleanly close the valve when complete.
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Achieve precise overfill without mess or spillage.
Installation & Use
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No modification required – banjo fitting is the correct size for BMW DCT.
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The plug features an 8AN barbed fitting, compatible with most fill pumps and tubing.
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You must follow the factory fill/level procedure first (using ISTA, Rheingold, or equivalent).
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Only add the extra fluid after confirming the factory level is correct.
BMW Fitment
2 Series (F87, 2019–2021)
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M2 Competition
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M2 CS Racing
3 Series (E90/E92, 2008–2013)
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M3
3 Series (F80, 2015–2019)
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M3
4 Series (F82, 2015–2021)
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M4
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M4 GTS
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M4 GT4
Key Benefits
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Prevents slow or missed shifts under high-G track driving.
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Reduces risk of DCT fault codes during competition use.
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Motorsport-proven design adapted from the M4 GT4.
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Plug-and-play installation with no permanent modifications.
Shipping & Delivery
Dispatch Times
Most stocked items dispatch within 1–2 business days. Some products may have longer lead times due to special ordering, availability, or build times. If your order contains multiple items, they may be shipped together once all items are ready unless otherwise agreed.
UK & International Shipping
We ship worldwide. Transit times vary depending on destination and courier. Tracking details are provided once your order is dispatched.
Import Duties & International Orders
International customers are responsible for all import duties, taxes, and clearance fees. These are not included in our prices and are outside of our control. Refusal or non-payment of import charges may result in return shipping, handling fees, and customs charges being deducted from any refund.
Damaged Shipments
If your parcel arrives visibly damaged, please refuse delivery or note the damage with the courier. If damage is discovered after opening, contact us immediately with photos. Do not install damaged items, as installation voids courier claims and return eligibility.
Returns
Returns must be authorised before sending anything back. Returns must be requested within 14 days of delivery and returned within 14 days of approval, in unused/uninstalled condition and in original packaging. Some items, including special-order, built-to-order, used, installed, or modified parts, are non-returnable.
Full details are available in our Shipping Policy and Returns & Refund Policy.
Warranty & Disclaimer
Warranty
Most products include a manufacturer’s warranty covering manufacturing defects only. Warranties do not cover wear and tear, improper installation, misuse or neglect, track use, competition or racing environments, labour costs, vehicle damage, downtime, or consequential loss. Warranty outcomes are determined by the manufacturer, not Clubsport Garage. Items must be returned for inspection at the customer’s cost unless agreed otherwise.
Fitment & Installation
Many products are aftermarket components and may require professional installation or minor adjustment. Perfect OEM-level fitment cannot be guaranteed. Professional installation by an experienced workshop is strongly recommended. Installed or used items cannot be returned.
Motorsport Use Disclaimer
Some products are intended for off-road, track, or motorsport use only and may not be legal for road use, for example non-TÜV/DOT-approved parts. It is the customer’s responsibility to ensure compliance with local laws, insurance requirements, and vehicle regulations. By purchasing and installing aftermarket parts, you accept all responsibility for ensuring compatibility, legal compliance, proper installation, and any resulting wear, damage, or failure.
Product Images & Descriptions
Product photos are illustrative and may differ slightly from the item supplied. If specific details are important, please contact us before purchasing.
Full details are available in our Terms of Service and related policy pages.
