NAK Rotary Shaft Seal Oil Seal 198400B-NAK 54.5x72x7mm
Ex VAT: £14.70
✓ In stock at our Arlesey workshop
Order before 2pm on a working day and this is picked and dispatched the same day by express courier, normally with you in 1–2 working days.
Collection from Arlesey also available — choose it at checkout.
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Get it installed
Visit our workshop and have it fitted by our own transmission specialists.
Delivery and Shipping
Delivery and Shipping
UK delivery — parts we hold in stock
Ordered before 2pm on a working day, these are dispatched the same day by express courier and normally arrive within 1–2 working days.
Parts supplied from our European supplier
A large part of our range is held by our supplier in Germany rather than on our own shelves. We order these in for you as soon as you place the order. They normally dispatch within 7–10 working days, and are then sent on by express courier like anything else. Nothing ships to you direct from Germany — it comes to our Arlesey workshop first, so you deal only with us for returns and warranty.
Collection from Arlesey
Click and collect is available on parts we physically hold. If an item has to come in from our supplier it cannot be collected, and checkout will tell you so before you pay.
International
3–5 working days once dispatched. Any customs charges or excise duties are the responsibility of the buyer.
*Delivery times are estimates and can be affected by factors outside our control.
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NAK Rotary Shaft Oil Seal 198400B-NAK – 54.5 x 72 x 7 mm
This NAK rotary shaft lip seal (part number 198400B-NAK) is a precision gearbox oil seal measuring 54.5mm inner diameter, 72mm outer diameter and 7mm height. It is used to prevent oil leakage at rotating shaft exits on a range of manual and automatic transmission applications. A deteriorated shaft seal causes oil leaks, which can lead to gearbox damage if left unattended.
Dimensions: ID 54.5 mm × OD 72 mm × Height 7 mm
Brand: NAK
OE / Cross-Reference Part Numbers: 198400B-NAK (NAK) · 19037052 (Corteco)
What is a rotary shaft seal used for in a gearbox?
Rotary shaft seals prevent transmission fluid from escaping around rotating shafts — such as input shafts, output shafts, and differential shafts. A failing seal causes leaks that can contaminate the clutch or deplete gearbox oil.
What dimensions do I need to check before ordering?
You must confirm the inner diameter (54.5 mm), outer diameter (72 mm), and height/width (7 mm) match your application exactly. Even a 0.5 mm difference will result in a poor seal.
Is this the same part as Corteco 19037052?
Yes — Corteco 19037052 is a recognised cross-reference for the NAK 198400B-NAK seal. Both share the same dimensions and lip design.
How do I know if my shaft seal has failed?
Signs include oil spots under the vehicle in the gearbox area, low gearbox oil level, and visible oil weeping or residue around a shaft exit point.
Can I fit this seal myself?
Shaft seal replacement typically requires removing the relevant shaft or axle and using a seal driver tool to press the new seal in squarely. It is recommended to have this done by a gearbox specialist.
Why Choose Eco Torque?
As specialists in gearbox rebuilds and repairs, Eco Torque takes pride in offering genuine gearbox parts, high-quality aftermarket alternatives and competitive pricing.
Need Help Finding the Right Part?
If you are unsure whether this part is compatible with your vehicle, send us your UK registration number or VIN and we will help you find the correct part.
Reference Number: ET2584
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