On average, the cost to replace a transmission synchronizer in a vehicle is close to $1750, though prices could be a few hundred dollars more or less. Labor can cost between $600-$1300 depending on where you live, and parts cost around $200-$400.
How much does it cost to replace Synchros?
If you are going to replace them, you’d probably want to go ahead and do the clutch and ISB (and throwout bearing and other bearings) while you are in there, but then you are quickly looking at $1500 if you are paying to have it done.
What happens if a synchro goes bad in a transmission?
When the synchros are in good operating condition, the transmission can be shifted quickly and smoothly with no grinding, double-clutching, or RPM matching necessary. … As a result, when you shift into a gear with a bad synchro, your transmission will grind into gear.
Can you replace transmission Synchros?
First, you remove the transmission from the car. Then, you disassemble the transmission and remove the offending synchronizer. Following this, you install a new synchronizer , reassemble the transmission and reinstall it in the car.
Can I drive with a bad synchro?
I believe you can drive with bad synchros almost indefinitely like this, if you can’t get the transmission fixed.
How do I know if my Synchros are worn out?
Generally speaking, when synchros fail, it will be a gradual change from the shifter feel you’re used to. Rarely will you find the synchros are shot for each gear, so if you’re feeling more resistance or grinding when shifting into 2nd, 3rd, or 4th then it’s likely that your synchros are the culprit.
What is a transmission synchronizer?
Synchronizers are the central component of the transmission featuring interfaces to the output, the clutch and, by way of the gear shift, to the driver. The layout and design of the synchronizers play an essential role in how the driver experiences the gear shift.
How many miles do Synchros last?
If a driver is smooth on gear changes and with general driving, synchros can last up to 60,000 miles in a semi-truck.
What causes Synchros to go bad?
Improper clutch adjustment is the #1 cause for synchro failure in the 3S 5-6 speed trans. The original synchros are a good design and can withstand a lot of abuse, but once a clutch starts to drag and the driver starts to force the trans into gear, the synchro rings will be badly damaged in short time.
What causes syncros to fail?
The #1 reason for transmission synchro failure is due to clutch issues. … 1)The transmission should never feel notchy or block you from a gear while shifting (some people call it ‘lockout’). If this happens, NEVER force the transmission into gear or the synchro will be ruined! This applies at any engine RPM.
How do transmission Synchros work?
A synchronizer adjusts the speed of the shaft so that the gears align more quickly as you shift. The slider pushes against the keys or balls in the synchronizer, which then push against the blocker ring. That ring then pushes against the gear’s cone, and the friction it causes helps the shaft speeds to equalize.
What is synchronizer ring?
The synchronizer ring (2) also called blocking ring, balk ring or friction ring, has a conical surface which comes into contact with the friction cone of the gear wheel. The purpose of the synchronizer ring is to produce friction torque in order to decelerate/accelerate the input shaft during a gearshift.