would this cure a notchy manual gearbox

It will probably help a bit after a few hundred miles, but as I previously answered it does NOT fix worn gearboxes. Regards, Jimbo.

Any good for auto box

Only for manuel gear box. Best regards Christian Stiller CEO CS Classic Parts GmbH

How many do i need for 2.7 litres of gearbox oil, if i need 3 x lots, can i put in all 60g in it ? or is that to much

It does recommend 1 tube per litre, but I've used 1 tube in a 2.4 ltr box and still noticed an improvement. You could put 60 g in, but remember to check the gear oil level is correct and don't over fill.

Can this be used in gearboxes with overdrive?

It really depends on the oil you use in your manual gearbox. This product MUST NOT be used with Automatic Transmission Fluids. If you are using SAE 75W (GL-4) or up to SAE 90W then this product will be fine. It's purpose is to coat the gears to reduce friction and wear, it does NOT fix worn gearboxes. Always check with your vehicle manufacturer what is the correct oil for your particular vehicle model.

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LIQUI MOLY Gear-Oil Additive | 20 g | Oil additive | SKU: 1040

Product ID: 48394780

Details

Brand
Liqui Moly
Item weight
0.02 Kilograms
Liquid volume
20 Millilitres
Material
Molybdenum
Package information
Tube

🔥Reduces temperature peaks under high thermal load

🔧Effective for up to 1L gearbox oil capacity

⚙️MoS2 film for ultra-smooth gear operation

177.16 DT

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Description

⚙️ Shift smoother, run cooler, and outlast the pack!

EFFORTLESS MAINTENANCE - One 20g tube treats up to 1 litre of gearbox oil for easy, precise dosing
PRECISION COMPATIBILITY - Optimized for manual transmissions, differentials, and driveshafts (excluding wet clutches)
ULTIMATE GEAR PROTECTION - Builds a durable MoS2 lubrication film to prevent wear and extend gearbox life
THERMAL PERFORMANCE BOOSTER - Disperses heat spikes ensuring cooler, quieter, and smoother shifting under stress
TRUSTED QUALITY LONGEVITY - Backed by Liqui Moly’s 2-year warranty and a 4.5-star rating from over 3,000 users

LIQUI MOLY Gear-Oil Additive is a high-performance oil additive containing concentrated molybdenum disulfide (MoS2) that forms a protective lubrication film on gearbox and differential components. Designed to reduce wear, lower temperature peaks, and ensure quieter, smoother gear shifts, it is ideal for manual transmissions and driveshafts under high thermal stress. Each 20g tube treats up to 1 litre of gearbox oil, enhancing mechanical efficiency and longevity with proven reliability and a 2-year manufacturer warranty.

Specifications

ASIN	B001CZSGUI
Best Sellers Rank	95,124 in Automotive ( See Top 100 in Automotive ) 94 in Engine Oil Additives
Brand Name	Liqui Moly
Container Type	Tube
Customer Reviews	4.5 4.5 out of 5 stars (3,102)
Global Trade Identification Number	04100420010408
Item Form	Oil
Item Weight	0.02 Kilograms
Liquid Volume	20 Millilitres
Manufacturer	Liqui Moly GmbH
Material	Molybdenum Disulfide
Model Number	1040
Number of Items	1
Number of Packs	1
Part Number	1040
Product Warranty	2 year manufacturer
Recommended Uses For Product	Mechanical
SAE J300 Viscosity Grade	20W-40
Specific Uses For Product	Prevent corrosion, increase efficiency
Unit Count	20.0 gram
Viscosity	0w

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177.16 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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