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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1159 (Manual Transmission - AISIN AY6) >> Description and Operation >> Transmission System Description and Operation >> 6th Gear Power Flow >> 6th Gear

6th Gear

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

the 6th gear (160) is an overdrive ratio. Moving the 5th/6th shift fork (250) forward moves the 5th/6th synchronizer sleeve (256). The synchronizer sleeve (256) slides on the synchronizer hub. The inner teeth on the synchronizer sleeve push against the synchronizer ring teeth, causing the synchronizer ring to contact, and the 6th gear (160) and the input shaft to match speeds. The synchronizer sleeve (256) then engages the selector teeth on 6th gear (160). The synchronizer hub is pressed on the input shaft (100). Power flow is now from the input shaft (100) through the synchronizer to the 6th gear (160) to the countershaft (400) and to the output shaft (150), which now turns faster than the speed of the input shaft (100).

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