---
product_id: 271063982
title: "zMax 51-306 Transmission Formula, 6 oz"
brand: "zmax"
price: "338 Lei"
currency: RON
in_stock: true
reviews_count: 5
category: "Zmax"
url: https://www.desertcart.ro/products/271063982-zmax-51-306-transmission-formula-6-oz
store_origin: RO
region: Romania
---

# Improves shifting performance Reduces wear on vital parts Lubricates metal and gears zMax 51-306 Transmission Formula, 6 oz

**Brand:** zmax
**Price:** 338 Lei
**Availability:** ✅ In Stock

## Summary

> ⚙️ Shift smoother, drive smarter — don’t let your transmission fall behind!

## Quick Answers

- **What is this?** zMax 51-306 Transmission Formula, 6 oz by zmax
- **How much does it cost?** 338 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/271063982-zmax-51-306-transmission-formula-6-oz)

## Best For

- zmax enthusiasts

## Why This Product

- Trusted zmax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seal Saver Formula:** Keeps transmission seals supple, preventing leaks and costly repairs.
- • **Effortless Application:** Just add and drive—no fluid removal needed, saving you time and hassle.
- • **Varnish & Carbon Defense:** Penetrates metal surfaces to prevent buildup, extending transmission life and reliability.
- • **Smooth Shifts, Every Drive:** Transforms hard gear changes into seamless transitions for a premium driving feel.
- • **Trusted by Pros & Enthusiasts:** Highly rated with 4.6 stars from 700+ users who demand peak performance.

## Overview

ZMAX 51-306 Transmission Formula is a 6 oz additive designed for automatic and manual transmissions that reduces carbon buildup, lubricates metal and gears, and keeps seals supple. It improves shifting performance by cleaning varnish and preventing wear, offering a simple add-and-drive solution favored by professionals and enthusiasts alike. Not suitable for CVT transmissions.

## Description

ZMAX 51-306 - Transmission Formula - For Automatic and Manual Transmissions - Reduces Carbon Build-Up - Lubricates Metal and Gears - Keeps Seals Supple - Improves Shifting Performance - 6 oz.

Review: Great Product that works very well…I buy this stuff ALL THE TIME and put it into EVERYTHING w/ an engine… Thank you 🙏
Review: We have a 2014 GMC Acadia with around 109k miles. We purchased it used and when i got it i noticed the trans fluid had yet to be replaced. So i did a flush and the transmission improved 90%. However, 1 to 2 and 2 to 3 was a little hard shifting, not bad but i knew it shifted smoother than what it was doing. So i got ZMAX which ive used before in my oil, but never in a transmission. Needless to say it cleaned the shift points up perfectly. After driving around for about 30 min it was already shifting snoother. After my wife drove it back and forth to work for a couple days its now like new. Super happy with this product. This is not a product thats going to fix mechanical issues. But i believed my issue was just a varnish issue around the solenoid actuators where the oil had not been replaced. GM recommends every 40k miles on trans oil. So yeah if your having a little harder shifts then your used too. Get this and it will clean it up. You dont need to pull any oil out, just add the product and drive, its that simple. In about 1000 miles the product will fully soak in to all the metal and clean and lubricate varnish points. This product is not designed to fix worn out trans parts. So dont bother because it will leave a bad taste in your mouth. It simply soaks into the metal, allowing varnish or carbon to not adhere to the metal services. Look into Prolong or Bestline products if you need to treat a worn out transmission.

## Features

- Reduced wear on vital parts
- Improved performance
- Improved shifting
- Not for use in CVT transmissions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00HEV2SK8 |
| Brand | ZMAX |
| Customer Reviews | 4.6 4.6 out of 5 stars (714) |
| Date First Available | 27 May 2015 |
| Item Weight | 226 g |
| Item model number | 51-306 |
| Manufacturer | ZMAX |
| Manufacturer Part Number | 51-306 |
| Product Dimensions | 7.62 x 7.62 x 13.97 cm; 226 g |

## Product Details

- **Brand:** ZMAX
- **Item weight:** 7.97 Ounces
- **Liquid volume:** 6
- **Material:** Polytetrafluoroethylene (PTFE)
- **Package information:** Bottle

## Images

![zMax 51-306 Transmission Formula, 6 oz - Image 1](https://m.media-amazon.com/images/I/711yIY1MPkL.jpg)
![zMax 51-306 Transmission Formula, 6 oz - Image 2](https://m.media-amazon.com/images/I/61HuJRiN67L.jpg)
![zMax 51-306 Transmission Formula, 6 oz - Image 3](https://m.media-amazon.com/images/I/51OVgYd-UaL.jpg)
![zMax 51-306 Transmission Formula, 6 oz - Image 4](https://m.media-amazon.com/images/I/61zrAaPu7xL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***. on 31 January 2026*

Great Product that works very well…I buy this stuff ALL THE TIME and put it into EVERYTHING w/ an engine… Thank you 🙏

### ⭐⭐⭐⭐⭐ Review
*by C***E on 15 July 2021*

We have a 2014 GMC Acadia with around 109k miles. We purchased it used and when i got it i noticed the trans fluid had yet to be replaced. So i did a flush and the transmission improved 90%. However, 1 to 2 and 2 to 3 was a little hard shifting, not bad but i knew it shifted smoother than what it was doing. So i got ZMAX which ive used before in my oil, but never in a transmission. Needless to say it cleaned the shift points up perfectly. After driving around for about 30 min it was already shifting snoother. After my wife drove it back and forth to work for a couple days its now like new. Super happy with this product. This is not a product thats going to fix mechanical issues. But i believed my issue was just a varnish issue around the solenoid actuators where the oil had not been replaced. GM recommends every 40k miles on trans oil. So yeah if your having a little harder shifts then your used too. Get this and it will clean it up. You dont need to pull any oil out, just add the product and drive, its that simple. In about 1000 miles the product will fully soak in to all the metal and clean and lubricate varnish points. This product is not designed to fix worn out trans parts. So dont bother because it will leave a bad taste in your mouth. It simply soaks into the metal, allowing varnish or carbon to not adhere to the metal services. Look into Prolong or Bestline products if you need to treat a worn out transmission.

### ⭐⭐⭐⭐⭐ Review
*by B***A on 13 November 2025*

Best stuff on the market. Not cheap. But worth every penny

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-03-07*