2001 Mazda B3000 No Pressure on Clutch

PHOENIX5IRE

MEMBER
2001 MAZDA B3000
6 CYL
4WD
MANUAL
90,000 MILES

I have a 2001 Mazda B3000 truck with 92K miles on it. The truck is a standard with 5speed transmission. I don't drive it very much, the other day I went to drive it and there was no pressure on the clutch, the pedal went all the way to the floor. I went to check the clutch master reservior and it was empty, I filled it up and bled the clutch several times but still no pressure. The master reservior is draining when bled. I checked all the lines for leaks but there was no leak anywhere that I can see. If I push the clutch pedal all the way down to the floor, I can still start the truck but of obviously, I can't engage any of the gears. I can also start the truck in 1st, 2nd, and 3rd gear but again, can't shift into any other gear because I have no clutch. What other areas (master/slave clutch?) Can I further diagnosis before spending money on a tow truck and expensive auto shop? Thanks in advance.

8 Replies

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,
Thank you for the donation.

You will have to check the clutch slave cylinder at the gear box for a leak, peel back the rubber boot and check for fluid. Also look under the dash where the clutch master cylinder attaches to the pedel, look for fluid leaking from the rear of the master cylinder, your problem should be one of these leaking.

Mark (mhpautos)

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Saturday, November 29th, 2008 AT 3:23 PM

PHOENIX5IRE

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5 POSTS

Hi Mark,

Thank you for the prompt response. It's been quite cold here so I haven't had a chance to look at it yet but I am planning on doing it this evening. I do have a question regarding the location of the slave cylinder. When you say look at the slave cylinder in the gear box, are you saying the slave cylinder is inside the gear box (transmission shell)? I do not remember seeing this slave cylinder anywhere on the hydraulic line from the Master cylinder to the transmission shell. Can you please help me locate this slave so I can narrow it down quicker? It's 20degrees here so it would really help me out from the cold. Thank you very much.

Lon

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Monday, December 1st, 2008 AT 1:38 PM

MHPAUTOS

MECHANIC
31,937 POSTS

Hi there,

This should be on the side of the bell housing, there is one pipe going into it, it should be quite visible.

Mark (mhpautos)

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Monday, December 1st, 2008 AT 2:50 PM

PHOENIX5IRE

MEMBER
5 POSTS

Hi Mark,

Thanks again for the quick response. After sending my previous email to you, I realized that it was the slave cylinder that I was bleeding from, which is on the side of the bell housing. How do you examine the slave cylinder if it's leaking from the outside or do you have to take the bell housing cover off to see the rubber boot. What's the easiest way to examine if the slave cylinder is leaking? It does not appear that the slave is leaking from the outside, I assume it must be inside of the bell housing if it's not evident from the oustide? From your previous questions, it's not leaking under the dash near the paddle nor underneath the master cylinder either.

Thanks again for your help.

Lon

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Monday, December 1st, 2008 AT 4:33 PM

PHOENIX5IRE

MEMBER
5 POSTS

Hi Mark,
After removing a small rubber covering directly underneath the gear box, I can see the slave cylinder inside and on the rubber boot, it is all wet and looks to be leaking. I stuck a screw drive thru the opening and touched the rubber boot and it was wet with fluid. So you're correct that the boot is leaking. What is the recommended step and do I replace the whole slave cylinder? If so, how do I get the slave cylinder out? It looks like I have to pull the gear box covering off, is this possible to do or do I need to take this to an auto shop? I am a little technical and is this something I can do myself ? I have changed timing-belt and water pump before, but nothing clutch related. I have also attached 2 pictures as visual guide to the gear box that I have, you probably know what it looks like already.

Thanks again for your help.

Lon