What transmission is in a 2004 Chevy 2500HD Duramax?
Chevy/GMC Duramax – 2001-2004 GM 6.6L LB7 Duramax – Transmission – Allison 1000 5 Speed.
How reliable is the 6.0 Vortec?
Overall, the 6.0 vortec is an extremely dependable and reliable motor. These engines frequently last beyond 300,000 miles with minimal issues beyond regular maintenance. However, making it to 300,000 miles will likely require some non-engine repairs and maintenance, such as suspension components.
Is the 8.1 a good motor?
The 8.1 Vortec is named the “Workhorse” and this name is completely true. Overall, these engines are extremely reliable and are built to last beyond 250,000 miles. The Allison transmissions that most are coupled with are known to be some of the most popular/favorite transmissions out there.
What kind of transmission does a Duramax diesel use?
The Allison 1000 has been the standard automatic transmission for the Duramax diesel since its inception in 2001. At this time, transmission’s size, strength, and versatility far exceeded anything available from the Duramax’s direct competitors.
When did the Duramax 6.6L turbo diesel come out?
The Duramax 6.6L V8 turbo-diesel engine is nearing its 20th year of production, after debuting in 2001. Over the engine’s lifespan it has gone through 6 different engine variations: LB7, LLY, LBZ, LMM, LML, and L5P.
Is the Duramax Allison 1000 a manual transmission?
Rather than becoming outdated, the Allison has evolved to match the performance characteristics and demands of the Duramax turbodiesel, which has undergone significant changes itself through the years. Manual transmissions are relatively rare for Duramax powered GMC/Chevrolet pickups, the primary reason being the attractiveness of the Allison 1000.
When did the LLY Duramax go to 6 speed?
It was mated to a 5-speed Allison Transmission in years 2004 and 2005. In 2006, the Allison Transmission was upgraded to a 6 speed. Although our LLY Duramax specifications chart above does mention the turbocharger found on these trucks, it doesn’t mention the fact that these are one of the largest turbochargers found on any Duramax today.