Auto Systems and Repair
Synchronizers
A synchronizer is a manual transmission engagement assembly that rests between two gears and contains a set conical brass rings. When the brass rings are pressed together during a gear shift, they adjust and match the speed of the two gears, allowing them to smoothly engage. Often these are called "synchros" in everyday conversation.

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5th gear jumps out when you let off the fuel and you hear a noise when your in 5th gear on a 1999 dodge 2500 diesel 4x4 manual transmission
Q&A > Dodge > 1999 Dodge Ram 2500
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There is knocking coming from the manual transmission when the clutch is engaged. The sound goes away when the clutch is no longer engaged.
Q&A > Mazda > 2005 Mazda RX-8
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I have a 5 speed Kia Rio that is making a pretty nasty sound as you depress the clutch pedal. A mechanic friend said the transmission could be low on fluid, on this manual transmission is there a s...
Q&A > Kia > 2006 Kia Rio
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I have a distinct clunking noise from the rear differential especially in the drive mode of the smg. After coming to a complete stop, the transmission is slow to engage first gear upon acceleration...
Q&A > BMW > 2007 BMW M6
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When I reverse with foot slightly on the brake, rolling down incline there is a wining/moaning noise, not really grinding but more like a moan. This is when it is a cold start. Seems like it woul...
Q&A > Nissan > 2007 Nissan Sentra
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