How manual transmission synchros work

 · The dealer stated in the work order I was experiencing a ***;synchro problem with the transmission***; I was then told at some point the transmission will need to be replaced. I almost fell out of my chair. Are you serious? A car at 80K miles has this problem. I had a GMC S manual for K miles, and I never experience this. The gears of a manual transmission on the main shaft are always meshed with the counter shaft gears. To put the transmission in a gear (1,2,3,4,5) a synchro collar slides over and engages small teeth on one of the gears at a time. The synchro collar matches the speed of a gear with the speed of the main shaft with brass synch rings with small teeth by friction.  · This video explains the operation of a synchromesh unit in a typical manual transmission, detailing synchromesh (blocker/baulk ring) www.doorway.ru Synchromes.

How Does a Manual Transmission Work? To effect a gear change, selecting first gear, for example, the driver depresses the clutch, disengaging the input shaft. Using the shift lever, the driver selects first gear, and the linkage moves the shift fork to connect the 1 st -2 nd locking collar with 1 st gear, locking it to the output shaft. Below we provide professional syncro ring kits for most popular manual transmissions. Ring kits are available for: Acura C3P4 G3T4, K4A6, S1 A1, Y80 GSR, RS LS GS AMC Borg Warner T5 World Class, Buick Saginaw 3 Speed, Saginaw 4 Speed, T10, M20, M21, M Chevrolet HM, NV, Muncie M20, M21, M22, NV, SM, NV, Borg Warner T5 World. The first manual transmissions were unsynchronized, or "non-synchro." They were also called rock crushers because drivers would grind the gears together trying to get them to mesh. Trucks used this type of transmission well into the early s because these transmissions were very strong.

Synchromesh transmissions are a further refined version of the constant mesh system, although less common. How it improves the system is by adding another stage to the process of connecting the gears to the drive shaft through the dog clutch. It splits the dog clutch in two – a gear fixed to the drive shaft called the synchronizer hub, and a collar around the outside of it that could slide back and forth called the shift sleeve. www.doorway.ru animation explains the basic principle of a blocker ring synchromesh unit as it is used in modern manual tra. The gears of a manual transmission on the main shaft are always meshed with the counter shaft gears. To put the transmission in a gear (1,2,3,4,5) a synchro collar slides over and engages small teeth on one of the gears at a time. The synchro collar matches the speed of a gear with the speed of the main shaft with brass synch rings with small teeth by friction.