Extend the Life Of the Allison 1000 Transmission in Your 2006 Chevrolet Kodiak Tow Vehicle

Posted by on Monday, November 24th, 2014

The Allison 1000 is a 6-speed double overdrive transmission produced by the Allison Transmission Company in Indianapolis, IN and Baltimore, MD. It comes from a family of similar transmissions that also includes the 2000 and 2400. Early Allison 1000’s were initially 5-speed transmissions, but in 2006 they added a sixth overdrive gear. Somewhat confusingly, the company didn’t change the transmission name when they added the sixth gear. The Allison 1000 is an extremely heavy duty transmission, capable of handling up to 620 lb-ft of torque. Compare this to GM’s highest rated transmission, the 4L80E which can only handle 420 lb-ft of torque. Put into use in 2006, the Allison 1000 transmission is still in production. This heavy duty transmission can be found in all sorts of motor home and custom applications, along with the Chevrolet Silverado, the Hummer H1, the Chevrolet B-Series and the GMC Sierra. It can also be found in the Chevrolet Kodiak and the GMC Topkick.

The Chevrolet Kodiac came with the Allison 1000 automatic transmission


The Chevrolet Kodiak is considered a medium duty truck, but that is only when you compare them to something like a Peterbilt or Freightliner over-the-road commercial truck. They share many body and interior parts in common with the one ton Chevrolet Silverado, but that is where the similarities end. They come with much heavier frames, brakes, suspensions and engines. All of them are equipped with a torque monster Duramax diesel engine and Dana S 110 real axle assemblies. The Kodiak is available with many options, including a crew cab that can hold up to six people, factory-installed four wheel drive, leather interiors and power everything (windows, doors, steering, brakes, etc).

The Kodiak is most often found towing a trailer or something similar. They are a perfect match for the very long (40+ feet) fifth wheel campers and tow hauls. It’s not uncommon to see a few dozen of them pulling racing rigs at any national NHRA or circle track event. With proper care, these trucks can last a very long time. Although the Allison 1000 is a heavy duty transmission, it can still suffer from problems common with all modern automatic transmissions. Here are a couple things that you can do to extend the life of the Allison 1000 transmission in your Chevrolet Kodiak when using it exclusively for towing.

Upgrade the quality of your transmission fluid. The organic oil-based fluid found in these transmissions has a very limited life span and can easily break down under extreme temperatures. It is therefore recommended that you switch over to a synthetic-based transmission fluid. Although more expensive than traditional fluids, the cost is well justified. The fluid will last longer, delaying costly transmission services, and it will protect your transmission’s internal components when they most need it.

You can even install an aftermarket transmission cooler to supplement the factory transmission cooler. It is a well known fact that excessive heat is a transmission’s worst enemy. It’s also common knowledge that towing generates more heat than any other source. The best way to keep your transmission cool and calm is to install the largest and best quality aftermarket transmission cooler you can find. You want to run it in series, behind the original cooler. This will provide the most cooling benefit. For extra protection, look for a transmission cooler that comes with its own built-in electric fans and temperature setting. Don’t forget to invest in a transmission temperature gauge too.

If you’re looking for a quality remanufactured transmission, then you won’t do better than ETE REMAN. That’s why we offer a three-year/unlimited mileage warranty on all our products. Browse our online catalog and contact us today.

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