Transmission Grinding Noise
 

I have a grinding noise when the clutch is engaged. It happens N-1-2-3-4 but is is 5-6. I replaced the clutch, release bearing, and tranny fluid. Noise is still there. I took a video and will attach when I have a chance to upload. I though I might be a synchro or another bearing in the transmission but not sure what. Tranny fluid had no metal flakes and looked as clean or cleaner from other posts on here.

Before the comments come in I have searched and haven't seen this issue yet.

https://youtu.be/fWYDD5x-Yg0

Car now has exedy stage 1 clutch, fa20 club turbo, and AEM meth injection. Noise started 1 year after turbo on stock clutch.

Post up the clip and we'll give it a listen.

My crystal ball tells me it may be a bad pilot bearing .......:iono:


humfrz

Would the pilot bearing not make noise even when the clutch was disengaged?

Unless the forces of the clutch are causing it...

Updated with video link.

Very loud neutral rollover. What do you hear when it's in gear? Can you have someone take a clip of you rowing through the gears?
@humfrz was teasing because without a clip we need his crystal ball. It was wrong this time.

Please elaborate on how it sounds for each gear. Your OP is unclear about that.

Sorry for the limited video, its very illegal to run a phone and drive in Ontario ($500 and 2 points). It sounds identical through 4th, its gone in 5th, and low rpm in 6 sounds different still.

I'm a but nervous to drive it. I've sourced a used tranny with 2k km on it to swap it out while I rebuild this one.

Yep, you're right!

After I turned my crystal ball "right side up" it said this:

"When the clutch is disengaged, the transmission’s input shaft and the engine’s crankshaft are rotating at different speeds. The pilot bearing allows for this difference. This is why a faulty pilot bearing makes its most noise when the clutch pedal is completely depressed and the clutch itself is completely disengaged. It’s located in the center of the crankshaft flange or flywheel."

OK, back to you @Ultramaroon.


humfrz

I will be in Cambridge for a few hours tomorrow night if you want to swing by and we can take another recording and I can give my 2 cents worth in person.
Just holler if you want a hand and I can PM you the address.

I feel honored to be getting help from the lengendary @Tcoat in person!

Ah .....ha ........ Tcoat is willing to make a house call (road call) ........:thumbsup:


humfrz

Gonna be in town anyway so easy. Wife is going to the grandson's graduation but they can only take 4 people. Just planning on chilling with the younger one so I will now introduce him to the wonderful world of car diagnostics.

Yes, but, dad, where is the dyno, laptop, OBDII cable and tuning program ...... ??

Oh, so you think you are going to figure it out with that long screwdriver stuck up to your ear ....... :confused0068:

OK, give it to me ..... I'll give it a try.

DANG! ...... no matter where I put the tip of the screwdriver on this engine ..... it sounds like it's about to fly apart ..... :eyebulge:

@RedFR-s ..... I suggest you sell this POS before it completely comes unglued.... :thumbdown:

Tcoat jr is done here!



humfrz

Grandson!


Son couldn't even tell you what make it is, has never touched a wrench and at 32 years old has never driven a mile in his life.
I am ashamed.