The Indianapolis-based engineering firm, which was once a owned by GM, introduced its 1000-series transmission in 1999, which has since been used in Duramax diesel powered versions of both the Chevrolet Silverado HD and GMC Sierra HD.
While these transmissions are robust and fairly reliable, they have a ton of moving parts, so something is bound to go wrong in them eventually. That’s where Kodiak Truck in North Prarie, Wisconsin steps in – a diesel truck shop that specializes in rebuilding these wildly complicated five- and six-speed automatics, among other things.
YouTuber Truck Master recently paid a visit to Kodiak Truck, which he hired to rebuild his six-speed Allison 1000 transmission for his Duramax diesel Chevrolet Silverado HD. Truck Master had previously paid to have the transmission rebuilt and to have a different clutch pack and other upgrade parts installed in order to help it handle more torque, but after experiencing issues with it, he knew he needed to take it in to see the professionals at Kodiak.
This video provides a fascinating look at how a professional dismantles an Allison 1000, diagnoses its issues and replaces the necessary parts. It’s also interesting to see him precisely measure the clearances within the transmission as he goes along – obviously a crucial part to ensuring it works as designed.
If you’re a diesel truck fan and want more insight into how the professionals service a high-quality heavy duty transmission like the Allison 1000, you definitely won’t want to miss the video embedded above.
Source: Truck Master on YouTube