Think I killed my r154 or pressure plate...

[dok33]

Was on my way to work this morning with the E/T streets on the car (was planning a trip to the strip tomorrow night) and heard a loud bang during a 2nd gear pull and now I've got a loud rpm-based clanking that goes away when I push the clutch in.

I know the 1st gear thrust washer is a weak point in the R154 but can it let go in 2nd gear like this? Also heard that pressure plate straps tend to let go at my tq level (~500 to the wheels) but it seems like the noise would be there regardless of whether the clutch was disengaged in that case since the PP is always spinning.

Going to drop the trans when I get some spare time, was just hoping to get some ideas in the meantime...

 

[destrux]

Pressure plate straps would make less noise with the clutch pushed in. You're taking the load off of them.

 

[suprahero]

Hopefully it's a clutch issue. I don't think the tranny would break @ 500, but it could. Mine has held pretty strong for the last year and a half at 640rwhp.

 

[dok33]

Good to know, I'd rather spend the $$ on a multi-plate clutch than another trans

 

[Compton74]

not saying that this is your issue but i had the same noise, and it was the bearing retainer, and thrust washer in the tranny so if nothing else checks out then thats most likely the issue, but hey man i wish you the best of luck! About the only good part of getting a tranny done is you dont have to worry about it for a while! Good luck sir

 

[dok33]

Got the inspection covers off tonight and the pressure plate looks fine but the throwout bearing hub is difficult to turn and binds at one point in its rotation so the throwout may be damaged but I'll have to pull the trans to see if it just failed or the bearing retainer failed and damaged it...

 

[shipkiller]

pilot bearing could also be the culprit of the low rpm noise that go away when the clutch is depressed.
or flywheel that is not torqued properly will make clunking noise too