Product Description
The ATS 303-900-4248 Allison Performance Valve Body is a precision-engineered upgrade designed for 2001-2002 GM trucks equipped with the 6.6L Duramax diesel engine and Allison 1000 transmission. This performance valve body is built to improve shift quality, increase transmission durability, and enhance overall drivetrain efficiency in both stock and modified applications.
ATS modifies the factory valve body to optimize hydraulic pressure and shift timing, resulting in firmer, more consistent shifts while reducing clutch slippage and heat buildup. These improvements help extend transmission life and provide better control under load, making it an ideal upgrade for towing, hauling, and performance use.
Designed as a direct replacement, this ATS valve body is a critical upgrade for Duramax owners looking to eliminate common Allison transmission issues while improving reliability and drivability.
FAQ
What does the ATS 303-900-4248 valve body improve?
It improves shift quality, increases line pressure, reduces clutch slippage, and enhances overall transmission durability.
Is this a direct replacement part?
Yes. This valve body is designed as a direct replacement for the factory unit in compatible Allison transmissions.
Do I need tuning with this upgrade?
Tuning is not required, but additional tuning may further enhance performance depending on your setup.
Is this good for towing applications?
Yes. The improved line pressure and shift control make it ideal for towing and heavy-duty use.
Why upgrade the Allison valve body?
Upgrading helps eliminate common factory issues such as soft shifts and clutch slippage, improving long-term reliability.
FITMENT
2001-2002 Chevrolet Silverado 2500HD 6.6L Duramax Diesel
2001-2002 Chevrolet Silverado 3500 6.6L Duramax Diesel
2001-2002 GMC Sierra 2500HD 6.6L Duramax Diesel
2001-2002 GMC Sierra 3500 6.6L Duramax Diesel
Equipped with Allison 1000 Transmission
Specifications for ATS 303-900-4248
| Specification | Details |
|---|---|
| Part Number | 303-900-4248 |
| Product Name | ATS Allison Performance Valve Body |
| Transmission Compatibility | Allison 1000 Automatic |
| Engine Fitment | 6.6L Duramax Diesel |
| Vehicle Fitment | 2001-2002 GM 2500HD / 3500 Trucks |
| Included Components | Performance Valve Body Assembly |
| Function | Improves Line Pressure, Shift Quality, and Durability |
| Installation | Direct Replacement |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Standard Ground Shipping |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
