Clutch pedal vibrating

Recently had a new clutch put in my 2002 tacoma. The first thing I noticed when I drove it after having the clutch replaced was that there was a lot of vibration coming through the clutch pedal. Is this a thing that will go away after a break in period or do I need to be concerned? Thanks

 

This is a tough one to answer. It *might* be OK and go away with some break-in. Or there could be something else going on. What all did they do during the replacement? Typically you would do the following:

-Pressure plate
-Clutch Disc
-Release Bearing
-Resurface/replace flywheel
-Rear main crankshaft seal
-Transmission input shaft seal (if needed)

Most people take care of all of these since it takes some work to get in there and replacing the seals is easy and cheap. If only the first 3 were done, you may have some glazing/scoring on your flywheel surface. This may or may not get better over time as the new disc beds in. If your rear main seal is leaking, that won't get better over time and should be addressed and could be fouling the disc surface. It's possible that the new release bearing is faulty, but that's not likely.

One other thing to check is the transmission and motor mounts. They have a rubber component that degrades over time. Any one of these could cause an odd feel, or it could just be normal. Without experiencing the vibration, it is hard to tell.

 

So I know that they replaced the clutch disc, pressure plate, throw out bearing, and they had the flywheel sent out to be resurfaced. They also said that some of my transmission mounts were shit and they replaced those. Thanks for the reply.

 

Well, they likely would have told you about the seals if they told you about the mounts. Sounds like they did everything they should have done. It may be somewhere else in the driveline, maybe u-joints or carrier bearing that you are feeling, or might just need some good break-in.

 

With the truck in neutral just sitting idling with the clutch all the way out, it's still vibrating. I can crawl under the truck and see the vibration coming through that tongue that the clutch slave presses on. Not sure if that information points to anything more specific...
Edit: as a point of clarification, there was zero vibration before having this work done.

 

I'd show that to the shop that did the work. That doesn't sound right, almost like a defective part or it wasn't put back together properly. Or, it could point to a gearbox issue.

 

Do you have the master cylinder linkage adjusted properly? This might happen if the throwout bearing is in constant contact with the pressure plate.

 

should it be adjusted so that there is some amount of constant pressure from the master then? I've always heard that you shouldn't drive with your foot on the clutch pedal, so I assumed it shouldn't be adjusted down tight.

 

pressure plate needs to be replaced. Some of the fingers are higher/lower than the others. This either a defective pressure plate or the tech tightened one bolt until flush and warped the assembly or the pressure plate isn't seated properly. There are 3 alignment studs that project out of the flywheel, maybe the pressure plate is hung up on one of them. Either way, it should have not been delivered to you like this.

 

No, you want some backlash in the pedal so it travels a bit before engaging the pressure plate.

My service manual says to press the clutch in all of the way, and slowly release while bringing the shifter to reverse. The point where you hear the gears grind should be 25mm (I think, I need to double check that) from the floor.

 

You heard right. You don't want your release bearing in constant contact with the pressure plate, there should be a small gap when released. The adjustment above sounds reasonable for the bite point, but I think you need to make sure you have some free play. It is a simple adjustment. Your mechanism might be a little different for adjusting, but the concept is the same.

 

That's a good point. My clutch assembly is actually wallowed out from the throwout bearing binding on the nose of the transmission housing, requiring excessive clutch force. It's such a gradual thing I didn't know any better.

Anyway, I have so much backlash I had to adjust it so it only barely disengages when all of the way down to get the throwout bearing free when up.

 

I just had my clutch replaced in a 02 with 255K on it. Guy only charged 420 for labor. Had to convince him the spring side went towards the flywheel and not the transmission as labeled on the disc. I bought the Aisin kit but noticed the spring side wasn't as pronounced as the original Aisin clutch disc. I wonder why that is? Also the clutch went to the floor so easy but returns with normal resistance. At first I thought I was going to bleed the system but the mechanic said it was normal.