This means we are very limited in what we can add to this area. Unfortunately these clutches engage into the outer aluminum barrel and the design of this barrel has a very short spline area. This too is a backwards designed clutch and steel setup where the clutches are external teeth and the steels are internal. The F clutch in this unit is also a major issue. The hub wears excessively where the steels contact it and it is common for the hub to be destroyed when the E clutch fails as the steels plates then warp and embed themselves into the aluminum clutch hub. This means that the steel plates spline to the aluminum E clutch hub. The clutch plates have external teeth while the steel plates have internal teeth. Another first is that fact that the E clutch and steels are not designed in the traditional way. This hub is splined to the mainshaft of the transmission and is extremely susceptible to stripping the aluminum spline out of it. The E clutch hub in this transmission is made of aluminum. The Allison 1000 and nearly all of the other HD transmissions never used aluminum for clutch hubs and planetary gears. This compact nature also makes it very difficult to add additional clutch upgrades as there is very little space to do so.Īnother issue that both of these unit have is due to the extensive use of lightweight aluminum. All but one set of clutches resides in the internal aluminum barrels making this unit EXTREMELY compact and lightweight for its size. This means that the external case is just that, a case. The new Allison 10L1000 is barrel loaded transmission. While some will say that the GM version is better or the Ford is better, what is true is they are extremely similar. What you see here is a Allison/GM interpretation of a common design. This transmission was development hand in hand with Ford. In fact, this unit really isn’t an Allison anymore. The new Allison 10L1000 shares NOTHING with its predecessor the Allison 1000. We have jumped from 6 speeds to 10 speeds and with the change in speeds comes a massive change in form. Part numbers are strictly used for identification purposes only, and in no way indicate a part is a Genuine Allison® part unless specifically identified as such.With the ever increasing constraints that manufactures are seeing in regards to fuel economy, there has been rapid changes in technology in the transmission realm. Allison® and Allison Transmission® are registered trademarks of Allison Transmission, Inc. We also carry a complete line of stock and performance dynamometer tested Rebuilt Allison® transmissions. Xcalliber has a comprehensive product line consisting of NEW stock and performance aftermarket parts, Genuine Allison® parts, surplus ,good used and refurbished parts for Allison® transmissions. and is NOT an authorized Allison® dealer, or the OE manufacturer for Allison Transmission®, Inc. Xcalliber is not affiliated or sponsored by Allison Transmission®, Inc. Xcalliber is an independent manufacturer & supplier of replacement parts for Allison® brand transmissions. Parts & Solutions for your Performance GM/Duramax Transmission!
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