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Transmission wont go into gear after new clutch


pSycHOarsOnisT

Well-Known Member
Joined
Jan 3, 2013
Messages
160
City
Pitt Meadows B.C.
Vehicle Year
2002
Transmission
Manual
Picked my truck up from the shop yesterday after getting a new master, slave, and clutch. After getting home i went to run a few errands and it is very difficult to get into any gear when stopped with the engine running. After getting moving its easier to shift but still not like it should be.

When stopped and trying to get into gear without the brake on the truck does roll a bit when pushing then shifter.


Ill be taking it to the shop after work today and get them to fix it. Im guessing the clutch isnt fully releasing. just curius what it might be.
 
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They probably did not bench bleed the master cylinder. Bleeding the slave may work but they should have at least know to do that already.
 
Not uncommon after new clutch disc is installed.

Could be air in the system, doesn't take much with new clutch disc, as clutch disc wears down a small bit of air doesn't matter as much.

The transmission always spins at rear wheel speed, there is no disconnect for that, so when you are stopped the transmission is at 0 RPMs
Engine idling is at 700RPMs
The clutch disconnects engine RPMs from transmission RPMs so you can shift gears

The clutch disc is sandwiched between the flywheel and pressure plate.
Flywheel and pressure plate always spin at engine RPM
Clutch disc is connected to input shaft of transmission so always spins at transmission RPM(except in Neutral)

When slave pushes in on the pressure plate it releases the sandwich pressure on the clutch disc allowing it and input shaft RPMs to be different than engine RPMs.
With new and thick clutch disc the release of all pressure means slave must extend fully

If clutch disc pressure is not fully released then clutch disc will rub on the 700 RPM flywheel and/or pressure plate and be hard to slow down to 0 RPMs(stopped rear wheel).
You have a 10" clutch disc you are trying to slow down with a 4" syncro, thats what the syncro does, it matches input shaft RPM with output shaft(rear wheel) RPMs
As you push shifter into 1st the syncro slows down the input shaft to 0 RPMs to match transmission RPMs
So when stopped with engine idling and clutch disc not fully release it would be hard to get into 1st gear.

When moving and shifting gears the RPM matching is easier when there is a little clutch disc rubbing, but as you said it is noticeable


Long shot is Pilot Bearing is bad, pilot bearing is in the flywheel/crank shaft, it supports the end of the input shaft, it allows flywheel to spin at engine RPMs and input shaft to spin at different RPMs, if this bearing is bad then input shaft RPM would stay at engine RPM and be hard to slow down.
But I would expect a noise when you were in 1st gear and stopped with clutch pedal down, that 700RPM to 0RPM would make a bad bearing "cry" :)
 
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Jeeze-o-Pete! Are there any good Shops left? There seem to be an increasing number of posts about shoddy work and the jobs not being done properly. I'd be damned if they made me wait. They would be sending a wrecker to pick up the truck and it would be their first priority. I am sure they demanded Full payment.
 

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