Product Description
Improve torque converter performance and transmission durability with the TransGo A1-LU-BST-04 Lock-Up Boost Valve, designed for 2004-2010 GM 2500HD and 3500HD trucks equipped with the Allison transmission. This precision-engineered upgrade increases lock-up apply pressure, delivering stronger engagement, reduced slip, and improved clutch holding power under load.
WHY INSTALL THE TRANSGO LOCK-UP BOOST VALVE?
- Increases torque converter clutch apply pressure
- Reduces converter slip and heat buildup
- Improves lock-up performance under towing and heavy load
- Helps prevent premature clutch wear and failure
- Enhances transmission efficiency and power transfer
- Ideal upgrade for stock and performance Duramax builds
FITMENT
- 2004-2005 GM Silverado / Sierra 2500HD & 3500HD – 6.6L Duramax LLY
- 2006-2007 GM Silverado / Sierra 2500HD & 3500HD – 6.6L Duramax LBZ
- 2007.5-2010 GM Silverado / Sierra 2500HD & 3500HD – 6.6L Duramax LMM
- Equipped with Allison 1000 Transmission
WHAT THIS UPGRADE DOES
The factory lock-up system can allow excessive slip under load, especially in towing or tuned applications. The TransGo A1-LU-BST-04 boost valve modifies hydraulic pressure to the torque converter clutch, resulting in firmer, more reliable lock-up and reduced heat generation. This leads to improved transmission longevity and better overall drivability.
SPECIFICATIONS FOR TRANSGO A1-LU-BST-04
| Specification | Details |
|---|---|
| Part Number | A1-LU-BST-04 |
| UPC | 810159321242 |
| GTIN | 810159321242 |
| Shipping Info | Calculated at checkout |
| Application | Allison 1000 Transmission |
| Prop 65 | Yes – www.P65Warnings.ca.gov |
FAQ
What does the lock-up boost valve improve?
It increases hydraulic pressure to the torque converter clutch, improving lock-up strength and reducing slip.
Will this help with towing performance?
Yes, it significantly improves converter engagement under load, making it ideal for towing and heavy-duty use.
Does this reduce transmission temperatures?
Yes, by reducing slip in the converter, it lowers heat buildup which is critical for transmission longevity.
Is tuning required after installation?
No tuning is required, but it pairs well with tuned trucks and upgraded transmissions.
Is this a good upgrade for stock trucks?
Absolutely. Even stock trucks benefit from improved lock-up performance and reduced wear.
