73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Preyemer on February 25, 2008, 10:41:58 pm
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I recently got a 94 ext s10. I've replaced the clutch, flywheel, throwout bearing, pilot bearing, clutch fork, master cylinder and slave cylinder. every bit of it is brand new.....When I let the truck sit over night it seems like air is getting in the line. If i pump it for a few minutes, it'll build up and do great. It shifts fine and runs awesome, but when i let it sit it all goes away and wont go into reverse without grinding like crazy and will barely go into first....
I'm thinking of replacing the line and see if that'll help since that's really the last thing to replace....any other suggestions on what it could be??
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did you double check all of the fittings? Did you bleed the system?
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I agree with Mr kaos .. i had truble with the clutch line going from the master cylinder...Might look fine but it wasnt..
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I dunno how they are on other trucks but on this one they just push in to the slave and master cylinder and there's a pin that you push in to keep it from coming out with a rubber seal inside of it....when i replaced the cylinders, i wiped it all off and got it dry, both ends are still dry...do you think air could be getting in and the fluid just isn't leaking out??
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I've seen a lot of people improperly install the release bearing. You need to make sure it's sitting on the fork correctly.
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its sittin in the fork right, you can stick a finger up in there and feel it.... it works great after you pump it for a while, i just dont know why i have to pump it when dang near everything on it is new.....oh well
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If you are positive it is installed in the fork correctly and you have no leaks then you need to bleed it.
Bulletin No.: 01-07-31-002B
Date: November 01, 2006
INFORMATION
Subject:
Improved Bleeding Procedure for Hydraulic Clutch Release System
Models:
2007 and Prior GM Passenger Cars and Light Duty Trucks (including Saturn)
2007 and Prior Chevrolet and GMC 6-7F T-Series Medium Duty Tilt Cab Models
2007 and Prior Isuzu F-Series Medium Duty Tilt Cab Models
2006-2007 HUMMER H3
Supercede:
This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 01-07-31-002A (Section 07 - Transmission/Transaxle). This bulletin is being issued to inform dealers of an improved procedure to aid in the ease of bleeding the clutch hydraulic system for the above listed vehicles. This procedure can be used anytime air is introduced into the hydraulic system. Following this procedure may also reduce the number of unnecessary parts replaced for low clutch pedal reserve and high shift effort.
Verify that all the lines and fittings are dry and secure.
Clean the dirt and grease from the reservoir cap in order to ensure that no foreign substances enter the system.
Remove the reservoir cap.
Fill the reservoir to the proper level with the required fluid.
Attach the J 43485 (Adapter) to the J 35555 (Mity Vac), or equivalent.
Brake fluid will deteriorate the rubber on J 43485. Use a clean shop cloth to wipe away the fluid after each use.
Place and hold the adapter on the reservoir filler neck to ensure a tight fit. In some cases, the adapter will fit into the reservoir opening.
Apply a vacuum of 51-68 kPa (15-20 hg) and remove the adapter.
Refill the reservoir to the proper level.
Repeat Steps 6 and 7.
If needed, refill the reservoir and continue to pull a vacuum until no more bubbles can be seen in the reservoir or until the fluid level no longer drops.
The vehicle will move if started in gear before the Actuator Cylinder is refilled and operational. Start the vehicle the first time in neutral to help prevent personal injury from vehicle movement and see if the transmission will shift easily into gear.
Pump the clutch pedal until firm (to refill actuator cylinder).
Add additional fluid if needed.
Test drive vehicle to ensure proper operation.