---
product_id: 360842079
title: "40009 Transmission Fix - 710ml"
brand: "lucas oil"
price: "€ 39.03"
currency: EUR
in_stock: true
reviews_count: 13
category: "Lucas Oil"
url: https://www.desertcart.de/products/360842079-40009-transmission-fix-710ml
store_origin: DE
region: Germany
---

# Add to existing fluid, no drain Lowers operating temps Stops slip & rough shifting 40009 Transmission Fix - 710ml

**Brand:** lucas oil
**Price:** € 39.03
**Availability:** ✅ In Stock

## Summary

> 🛠️ Keep your gears smooth and your ride unstoppable!

## Quick Answers

- **What is this?** 40009 Transmission Fix - 710ml by lucas oil
- **How much does it cost?** € 39.03 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/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

- • **Easy Add-On:** Simply add to existing fluid—no draining required, saving time and hassle.
- • **Slip No More:** Eliminates slip, hesitation, and rough shifting for smooth gear changes.
- • **Seal the Deal:** Effectively stops most transmission seal leaks, preventing costly repairs.
- • **Proven Performance:** Trusted by enthusiasts and pros alike, effective in a high percentage of cases.
- • **Cooler Runs, Longer Life:** Lowers transmission operating temperatures to protect your investment.

## Overview

Lucas Oil 40009 Transmission Fix is a 710ml non-solvent additive designed to stop slip, hesitation, and rough shifting in worn transmissions while sealing leaks. Compatible with nearly all transmissions except CVTs, it lowers operating temperatures and can be added directly to existing fluid without draining. Ideal for preventative maintenance and extending transmission life, it’s a trusted solution for both manual and automatic gearboxes.

## 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: It worked on my fiat panda. - 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.
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 | 7,389 in Automotive ( See Top 100 in Automotive ) 14 in Gear Oils |
| Brand | Lucas Oil |
| Customer Reviews | 4.2 4.2 out of 5 stars (152) |
| Date First Available | 24 Aug. 2021 |
| Item Weight | 720 g |
| Item model number | 40009 |
| Manufacturer | Lucas Oil Products Inc |
| Manufacturer part number | 40009 |
| Model | Transmission Fix |
| Product Dimensions | 8.51 x 8.51 x 24.76 cm; 720 g |
| 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)

## 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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ So far so good
*by M***T on 4 July 2024*

I have an old VW with a 6 sp zf box about 150k...even though I've done 3 fluid changes, filters, I still get the old owl whoop noise....even using lifeguard 6...drained out 1 lite of the old crap, mixed up the squeak stop with 0.5 litre of new arf fluid, this stuff IS VERY THICK AND HEAVY, takes a while to get liquid, then pumped it in...a day later, massive improvement in torque converter judder at 1 - 2k... A classic issues on the zf 6sp box... This should keep it going till I scrap the car, but the driveability is so much better ... Worth the effort, just hope it lasts a few years !!

## 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

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-01-27*