---
product_id: 330979480
title: "Castrol TranSynd 668 Full-Synthetic Auto Transmission Fluid, 5 Gallon Pail"
brand: "castrol"
price: "R19042"
currency: ZAR
in_stock: true
category: "Castrol"
url: https://www.desertcart.co.za/products/330979480-castrol-transynd-668-full-synthetic-auto-transmission-fluid-5-gallon
store_origin: ZA
region: South Africa
---

# Up to 300,000 miles extended drain interval Full-synthetic formula for peak performance Optimized for Allison TES 668 transmissions Castrol TranSynd 668 Full-Synthetic Auto Transmission Fluid, 5 Gallon Pail

**Brand:** castrol
**Price:** R19042
**Availability:** ✅ In Stock

## Summary

> ⚙️ Keep your transmission running smoother, longer — because your ride deserves the best.

## Quick Answers

- **What is this?** Castrol TranSynd 668 Full-Synthetic Auto Transmission Fluid, 5 Gallon Pail by castrol
- **How much does it cost?** R19042 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/330979480-castrol-transynd-668-full-synthetic-auto-transmission-fluid-5-gallon)

## Best For

- castrol enthusiasts

## Why This Product

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

## Key Features

- • **Bulk 5-Gallon Pail:** Ideal for fleet managers and professionals who demand convenience and value in maintenance.
- • **Enhanced Durability:** Extended anti-shudder and clutch-friction durability for smoother, more reliable shifts.
- • **Unmatched Longevity:** Drain intervals up to 12x longer than conventional fluids, saving time and money.
- • **Allison TES 668 Certified:** Specifically engineered and approved for Allison heavy-duty transmissions for guaranteed compatibility.
- • **Precision Gear Protection:** Shear-stable viscosity ensures consistent wear protection throughout the entire drain cycle.

## Overview

Castrol TranSynd 668 is a premium full-synthetic automatic transmission fluid designed exclusively for Allison TES 668 transmissions. It offers industry-leading extended drain intervals up to 300,000 miles, superior shear stability, and enhanced gear and clutch protection, making it the go-to choice for heavy-duty, on-highway vehicles seeking maximum performance and reliability.

## Description

Description Castrol® TranSynd 668® is a premium, full-synthetic automatic transmission fluid specifically formulated for Allison Transmission® heavy-duty, on-highway automatic transmissions. TranSynd 668 provides oxidative stability, anti-wear performance, and friction durability. TES 668™ specification differentiators include extended anti-shudder durability and extended clutch-friction durability. This fluid features an Allison TES 668™ approval. The TES 668 specification is fully backwards compatible with both TES 295® and TES 468™ applications.

## Features

- TranSynd is a full-synthetic, automatic transmission fluid designed specifically for ALLISON transmissions / TES 468 is now covered by TranSynd 668
- Allows for extended drain intervals of up to 300,000 miles / 48 months in general-duty transmissions and up to 150,000 miles / 48 months in severe-duty transmissions
- 12 times longer drain intervals than conventional and other non-TES 668 and non0-TES 295 fluids
- Shear stability that helps maintain a stable viscosity which provides wear protection in gears throughout the drain interval
- Improved gear protection, extended anti-shudder durability and extended clutch-friction durability

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0977Q8S49 |
| Best Sellers Rank | #43,374 in Automotive ( See Top 100 in Automotive ) #114 in Transmission Fluids |
| Brand Name | Castrol |
| Container Type | Pail |
| Customer Reviews | 4.7 4.7 out of 5 stars (336) |
| Global Trade Identification Number | 00079191219638 |
| Included Components | Transmission Fluid |
| Item Form | Liquid |
| Item Weight | 38 pounds |
| Liquid Volume | 640 fluid ounces |
| Manufacturer | Castrol |
| Material | Synthetic |
| Model Number | 15E2E0 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | 15E2E0 |
| Recommended Uses For Product | Automotive |
| SAE J300 Viscosity Grade | 5W-40 |
| Specific Uses For Product | Specific vehicle and transmission types, enhancing performance and longevity |
| UPC | 079191219638 |
| Unit Count | 640 Fluid Ounces |
| Warranty Description | 3 months |

## Product Details

- **Brand:** Castrol
- **Item Weight:** 38 pounds
- **Liquid Volume:** 640 fluid ounces
- **Material:** Synthetic
- **Package Information:** Pail

## Images

![Castrol TranSynd 668 Full-Synthetic Auto Transmission Fluid, 5 Gallon Pail - Image 1](https://m.media-amazon.com/images/I/614yvBQo87L.jpg)

## Questions & Answers

**Q: Este aceite sirve para camiones con transmisión mecánica**
A: No , es solo para transmision automatica.

**Q: What is the shelf life of an unopened container?**
A: Castrol recommends a recheck time of 48 months from the date of manufacture for Castrol TranSynd 668.

**Q: What is the shelf life of an open container in resealed**
A: Castrol recommends a recheck time of 48 months from the date of manufacture for Castrol TranSynd 668.

**Q: Will this work on thw allison 1000?**
A: Castrol always recommends following the guidelines of the original engine manufacturer for the recommended fluid for use in your specific application. This information can be found in the vehicle's owner's manual or by contacting the manufacturer directly. Before using any lubricant, ensure that the lubricant product specifications meet or exceed the lubricant specifications required by the Original Equipment Manufacturer (OEM) for that specific use.

According to Castrol's Recommendations Guide recommended for Allison 1000 Series transmissions, fluid meeting Allison TES-295 is recommended.  Castrol TranSynd 668 full synthetic transmission fluid carries the Allison specification TES 668 approval.  Allison TES 668 is backward compatible with Allison TES 295 and Allison TES 468, so Castrol TranSynd 668 can be used in applications that call for Allison TES 295 or Allison TES 468 fluid.

## Frequently Bought Together

- Castrol TranSynd 668 Full-Synthetic Automatic Transmission Fluid, 5 Gallon Pail
- Allison Filter Kit - 29539579 Screw-on Filter with Magnet - Entire kit for replacing filter on Alison transmission per OEM Specs. True OEM Filter!
- Stone River Products Castrol TranSynd 668 Allison 2021 Updated SPEC 1 GALLON ONLY BY DOXA WORLDWIDE

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**Shop now:** [https://www.desertcart.co.za/products/330979480-castrol-transynd-668-full-synthetic-auto-transmission-fluid-5-gallon](https://www.desertcart.co.za/products/330979480-castrol-transynd-668-full-synthetic-auto-transmission-fluid-5-gallon)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-01*