dabomb6608

iTrader: (3)

Ok guys riddle me this, last weekend I pulled my tranny to inspect the clutch/throwout bearing/flywheel due to a pretty bad vibration problem I have had. To go alittle into detail on that basically what it would do is shake/rattle the whole car when slowly letting the clutch out say in a drivethru. The higher the rpms the better it would be. Also, sitting still clutch in/out trans in N(obviously) it has a very noticeable vibration when I rev it around 2500rpm but goes away just above 3000. Some other spots it does it but not as bad. Some spots are smooth as butter. But its always in the same range.

Anyways! So I pull the trans and everything is tight and looks fine, I went ahead and pulled the pressure plate anyways and checked it the clutch and the flywheel surface and bolts. All appeared fine and nothing struck out as being wrong. Well got my clutch alignment tool out and put the clutch back together and tightened up. Went and put the bellhousing on. Put the throwout bearing on........here is the kicker. I put it in wrong.....see picture.

Got it all back together and went for a drive. It no longer had the vibration when taking off in lots/drivethrus. REALLY smooth then and has drastically made driving it more pleasant. Well thats the ONLY good that came from this. It still has the other vibrations, along with the pedal being different. The friction zone moved to a lot lower spot(near floor but still feels like it completely activates/deactivates). It also feels clunkier(for lack of better terms) when driving around like normal and shifting. It just seems to kindve clunk after I let the clutch out and apply gas.

So now for the question, do I leave it be and try bleading the clutch to get the what feels to be like air in the line out(has a lot of easy play before it gets hard) OR do I pull that darn thing out again and put it back only to get the takeoff vibrations back? And basically return to square one, but only after more cut knuckles, cussing, bleeding, anger, and a whole day gone wasted? Sorry for the lengthy story but I try to give details instead of just giving you "bearing/vibration/car"

Here is a picture showing how I installed the throwout bearing wrong.

jmd

iTrader: (4)

As for the right/wrong, that's not even a question.

Pull it, take the clutch & flywheel assy. to a rebuilder and say "here's what's happening. Is the sprung hub of the disc correct and in good shape?"

To some extent, off-idle ultra-slow release of the clutch will have some vibration. So it may be within normalcy for the clutch to need some rpm to smoothly take off depending on material & how tight the hub is sprung.

As for the rpm issue, what flywheel did you install so the 400 was correctly externally balanced? A weight plate sandwiched between crank & flywheel is necessary with a 1985 third gen flywheel and the T5 behind the 400. Or an aftermarket 153 flywheel balanced for the 400 works.

dabomb6608

iTrader: (3)

Ok, I planned on pulling it this Sunday to correct the bearing. Idk of any places to take it to check that around here. Also that off idle vibration definitely was NOT within normal description. It would literally shake/vibrate the whole car.

On the flywheel question I have a stock 305/350 replacement neutral balance flywheel with the weight sandwiched between it and the block. So I should be good there. The clutch was just the standard ZOOM stock replacement. I got it expecting to replace it once it burnt up. I kindve expected it to happen a lot sooner with me learning stick in it.

Jupiter

iTrader: (1)

Did you check the pilot bearing/bushing? Might be worth replacing it to remove that as an issue. It's very easy to get the fork set cockeyed. Did you mark the PP with the flywheel before removing it and installing it back in the same clocking? I have had issues before when i re-installed my pressure plate with diiferent clocking then when i took it out and introduced a slight vibration. I learned to mark it when it is first installed and always put it back the same whenever i remove it. Good idea to do the same with the driveshaft when removing/installing.

dabomb6608

iTrader: (3)

I did check the pilot bushing. It looked fine. It was new along with the clutch/flywheel/pressure plate just under a year ago. I didnt mark the pressure plate or driveshaft at removal.

dabomb6608

iTrader: (3)

Well got the throwing on right and took it for a drive. It definitely feels back to normal in terms of pedal movement and feel. It also doesn't have the off idle vibration that I can tell. So as of now it is better then it was when I first pulled it. Even though the slight vibration while sitting still at 2500rpm is still there. As well as when moving. I think I can deal with this for now though.