Does a 2003 Duramax have an Allison Transmission?

The Allison 1000 has been the standard automatic transmission for the Duramax diesel since its inception in 2001. … GM sold Allison Transmission in 2007, although Duramax powered pickups continue to use their transmissions.

What transmission is in a 2003 Duramax?

Chevy/GMC Duramax – 2001-2004 GM 6.6L LB7 Duramax – Transmission – Allison 1000 5 Speed.

What year Duramax has the Allison Transmission?

General Motors Automatic & Manual Transmission Ratios, Model Years

Transmission Type Model Years
ZF S6-650 6 spd manual 2001 – 2006 6.6L Duramax
Allison 1000 5 spd auto 2001 – 2005 6.6L Duramax
Allison 1000 6 spd auto 2006 – current 6.6L Duramax
6L50 6 spd auto 2005 – current 2.8L Duramax

How do you tell if a Duramax has a Allison?

every duramax in a GM truck has an allison. look under the truck at the tranny, it should have a red spin on filter on it.

How much HP can a Allison 1000 handle?

As you’ve probably deduced up to this point, the stock Allison will handle roughly 350 to 400-rwhp in five-speed form and 425 to 450-rwhp in six-speed trim. However, if you push things past that point the clutches will eventually slip and bring on the Allison’s notorious “limp mode” condition (i.e. limp home mode).

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Which Duramax engine is best?

Released in 2017, the L5P is the latest a greatest version of the Duramax. It is substantially more durable than previous Duramax models and features an impressive 445 HP and 910 lb-ft of torque. The L5P replaced the LML in Chevy Silverado pickup trucks.

How much horsepower can you get out of a 6.6 Duramax?

Mind blowing. The only thing in that engine that isn’t stock is the (Banks camshft).” For reference, the 6.6L V8 L5P Duramax engine is rated at 445 horsepower at 2,800 rpm and 910 pound-feet of torque at 1,600 rpm from the factory.

Which is better LLY or LB7?

The LB7 was the simplest in terms of emissions controls, while the LLY came with the largest turbocharger ever offered. … The LML brought higher fuel pressure, cleaner emissions and nearly 400hp into the equation, while the current L5P upped the ante even further and has 600rwhp potential in ’17-newer GM trucks.

What year Duramax has injector problems?

What year Duramax has injector problems? The LB7 Duramax built from 2001 – 2004.5 is known for injector failure. The good news is the replacement injectors you purchase from us incorporate several updates to help prevent repeat failures.

How many miles can you put on a Duramax?

You can hit up to 350k miles provided with proper maintenance. Some even claim that it can go up to 500k miles but I am not that sure if these people are just exaggerated.

Why are Allison transmissions so good?

Unlike manual and automated manual transmissions (AMTs), Allison Automatics have no power interrupts during shift changes. They make the best use of the engine’s horsepower and torque by delivering more of it to the wheels. … This not only saves time and money, it also provides maximum protection for the transmission.

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Did Ford ever use an Allison transmission?

At the press event introducing its new Super Duty trucks, representatives frequently repeated the fact that Ford is the only manufacturer that designs and builds all of its own heavy-duty engines and transmissions—a not-so-subtle dig at FCA’s Cummins engine and Aisin transmission suppliers and GM’s use of Allison …

Is the Allison 1000 transmission good?

However, among truck enthusiasts, Allison is best known for its venerable 1000 transmission. While there’s nothing overly exceptional about an Allison 1000 transmission, the gearbox has a longstanding reputation for reliability and continuous improvement.

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