--- product_id: 360842079 title: "40009 Transmission Fix - 710ml" brand: "lucas oil" price: "NZ$84" currency: NZD in_stock: true reviews_count: 13 category: "Lucas Oil" url: https://www.desertcart.nz/products/360842079-40009-transmission-fix-710ml store_origin: NZ region: New Zealand --- # Add to existing fluid, no drain Lowers operating temps Stops slip & rough shifting 40009 Transmission Fix - 710ml **Brand:** lucas oil **Price:** NZ$84 **Availability:** ✅ In Stock ## Summary > 🛠️ Keep your ride shifting like new—don’t let worn transmissions slow you down! ## Quick Answers - **What is this?** 40009 Transmission Fix - 710ml by lucas oil - **How much does it cost?** NZ$84 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/360842079-40009-transmission-fix-710ml) ## Best For - lucas oil enthusiasts ## Why This Product - Trusted lucas oil brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Seal the Deal:** Effectively stops most seal leaks, preventing costly repairs. - • **No Drain, No Downtime:** Easily added to existing fluid—no messy draining required. - • **Universal Compatibility:** Works with nearly all transmissions except CVT, making it a versatile must-have. - • **Cooler Runs, Longer Life:** Lowers transmission operating temperatures to protect your investment. - • **Smooth Shifts, Zero Slip:** Eliminates slip, hesitation, and rough gear changes for seamless driving. ## Overview Lucas Oil 40009 Transmission Fix is a 710ml synthetic additive designed to reduce transmission slip, lower operating temperatures, and stop foaming without the need to drain existing fluid. Compatible with most transmissions except CVT, it improves shifting smoothness and seals leaks, extending transmission life and performance. ## Description Lucas Transmission Fix is a non-solvent formula that stops slip, hesitation and rough shifting in worn transmissions and completely eliminates most seal leaks. Use in any transmission for preventative maintenance. Use also in light duty manual transmissions to increase shifting ease and transmission life. Add to existing transmission fluid with engine warm and idling or with fluid change. A second bottle may be necessary in larger or badly worn transmissions. Smaller transmissions use 355ml. Compatible with all transmissions and transmission fluids with the exception of CVT transmissions and transmission fluids. Review: Good - Good Review: Finally! Something which masked my syncro crunch issue! - I have tried various gearbox oil additives and found not many are for bad gearbox syncros. Like its not going to repair something that is already broken. Even Redline’s Shockproof gear oil failed to cure/mask my failing syncros. Additives like Molybdenum are too slippery for gears in higher quantities therefore I can’t use this for something which has issue gripping to begin with. I was originally going to use the Lucas Oil Stabiliser until I saw a video on YouTube conducted by ProjectFarm who showed improvements of an automatic gearbox gripping gears better with the Lucas Stop Slip additive. Therefore, I was convinced that this might do the trick. The car I used this in is a Nissan Skyline R33 GT-R. It says to use two bottles for badly worn transmissions. Considering I could still get into all gears, some with crunching, i figured I’d try 1.5 of a bottle for the gearbox and split the remaining of the bottle, so 0.25 of a bottle in each differential (front and rear). Alongside Lucas Gear Oil 80w90. Something just overall thick and consistent. This did just the trick! 3rd and 4th gear syncro crunch cured! Its not buttery smooth, still might need to double clutch to get into first gear from neutral for example but its definitely an improvement when driving! If you are looking for an additive to help prolong the life of failing syncros or worn transmissions. I recommend buying this to keep the car running until you can either replace/repair the gearbox. ## Features - Contains no solvents - Lowers operating temperatures and stops foaming - Can be added to existing fluid without draining any out - Effective in an extremely high percentage of cases ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09DGQDKL1 | | Best Sellers Rank | 6,328 in Automotive ( See Top 100 in Automotive ) 16 in Gear Oils | | Brand Name | Lucas Oil | | Container Type | Bottle | | Country of Origin | USA | | Customer Reviews | 4.3 4.3 out of 5 stars (159) | | Included Components | One Bottle | | Item Form | Liquid | | Item Type Name | Oil Additive | | Item Weight | 0.72 Kilograms | | Liquid Volume | 809 Millilitres | | Manufacturer | Lucas Oil Products Inc | | Material | Synthetic | | Model Number | 40009 | | Number of Items | 1 | | Part Number | 40009 | | Recommended Uses For Product | lubricating and improving the performance of vehicle transmissions | | SAE J300 Viscosity Grade | 0W | | Specific Uses For Product | Lubrication, Performance Improvement for Vehicle Transmissions | | UPC | 049807800093 049807400095 049807300098 | | Unit Count | 710.0 millilitre | | Viscosity | 0w | ## Product Details - **Brand:** Lucas Oil - **Item weight:** 0.72 Kilograms - **Liquid volume:** 809 Millilitres - **Material:** Synthetic - **Package information:** Bottle ## Images ![40009 Transmission Fix - 710ml - Image 1](https://m.media-amazon.com/images/I/71FncDP+lXL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Why is it not good for CVT?** A: Because its not make for cvt, its for automatic transmission as in original type! ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good *by A***S on 27 February 2026* Good ### ⭐⭐⭐⭐⭐ Finally! Something which masked my syncro crunch issue! *by M***N on 11 February 2024* I have tried various gearbox oil additives and found not many are for bad gearbox syncros. Like its not going to repair something that is already broken. Even Redline’s Shockproof gear oil failed to cure/mask my failing syncros. Additives like Molybdenum are too slippery for gears in higher quantities therefore I can’t use this for something which has issue gripping to begin with. I was originally going to use the Lucas Oil Stabiliser until I saw a video on YouTube conducted by ProjectFarm who showed improvements of an automatic gearbox gripping gears better with the Lucas Stop Slip additive. Therefore, I was convinced that this might do the trick. The car I used this in is a Nissan Skyline R33 GT-R. It says to use two bottles for badly worn transmissions. Considering I could still get into all gears, some with crunching, i figured I’d try 1.5 of a bottle for the gearbox and split the remaining of the bottle, so 0.25 of a bottle in each differential (front and rear). Alongside Lucas Gear Oil 80w90. Something just overall thick and consistent. This did just the trick! 3rd and 4th gear syncro crunch cured! Its not buttery smooth, still might need to double clutch to get into first gear from neutral for example but its definitely an improvement when driving! If you are looking for an additive to help prolong the life of failing syncros or worn transmissions. I recommend buying this to keep the car running until you can either replace/repair the gearbox. ### ⭐⭐⭐⭐⭐ It worked on my fiat panda. *by P***Z on 25 May 2025* Fixed the gearbox leak in my Fiat Panda 2011 1.2 manual. Do yourself a favour after unscrewing the top put a small hole in the foil seal then stand in a pan of simmering water for an hour, a rubber tube easily fits over the conical shaped end. I managed to put half of this to the existing oil no problem, gotta squeeze hard though. It was possible to move the breather pipe away from the air filter housing and push tube up through the engine bay and other end in gearbox do it stood up. Hope that makes sense. ## Frequently Bought Together - Lucas Oil 40009 Transmission Fix - 710ml - Lucas Oil 10001 Heavy Duty Oil Stabiliser, 946 ml - Lucas Oil 10278 Engine Stop Leak, 946 ml --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nz/products/360842079-40009-transmission-fix-710ml](https://www.desertcart.nz/products/360842079-40009-transmission-fix-710ml) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-05-17*