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Old 09-20-2020, 11:05 PM   #1
STiWanabe
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Default Mystified by my clutch.

I just picked up a wrx with a 6spd swap and a burnt clutch. I was a bit surprised when I pulled it out and saw that the clutch looked relatively new but very burnt. Plenty of clutch material left but extremely glazed and the pressure plate and flywheel black, blue, and purple

I proceeded to install a brand new clutch and flywheel. I get the air out of the slave cylinder and ready to test drive. The car will barely move with the clutch engaged and there is a high pitched whining noise.
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Old 09-21-2020, 09:46 AM   #2
Samurai Jack
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Obviously, the previous owner beat the crap out of the car before they sold it to you.

What brand clutch?
Did you buy a 5MT or a 6MT clutch kit?
Did you replace the Pilot and Throwout bearings?
Did you use an OEM Throwout bearing?
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Old 09-21-2020, 12:12 PM   #3
STiWanabe
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Quote:
Originally Posted by Samurai Jack View Post
Obviously, the previous owner beat the crap out of the car before they sold it to you.

What brand clutch?
Did you buy a 5MT or a 6MT clutch kit?
Did you replace the Pilot and Throwout bearings?
Did you use an OEM Throwout bearing?
No mystery there. He told me he launched it and roasted the clutch.
6MT clutch and flywheel.
competition clutch, pressure plate, throwout bearing, and pilot bearing. Exedy OEM replacement flywheel.
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Old 09-21-2020, 02:16 PM   #4
Max Capacity
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I wonder if the clutch fork is the problem ?

Did it by chance fall off the pivot ball while you were moving the tranny around to install it ?

That happened to me once with a 5mt. But I couldn't even get it to go into a gear with the engine running.


Go back over everything you did, hopefully something will pop out at you.
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Old 09-21-2020, 06:16 PM   #5
Samurai Jack
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Quote:
Originally Posted by STiWanabe View Post
No mystery there. He told me he launched it and roasted the clutch.
6MT clutch and flywheel.
competition clutch, pressure plate, throwout bearing, and pilot bearing. Exedy OEM replacement flywheel.
OK, so . . . are you sure you have the correct size throwout bearing? Wrong size bearing will cause issues like you described.

Have had mechanics install wrong throwout bearing before and when I took it back they couldn't figure it out. I was right there the whole time they kept trying different combinations.

Then near the end of the day I said, " Are you sure you put in the correct throwout bearing? ". Sure enough, that was the issue.
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Old 09-22-2020, 02:58 PM   #6
STiWanabe
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Quote:
Originally Posted by Max Capacity View Post
I wonder if the clutch fork is the problem ?

Did it by chance fall off the pivot ball while you were moving the tranny around to install it ?

That happened to me once with a 5mt. But I couldn't even get it to go into a gear with the engine running.


Go back over everything you did, hopefully something will pop out at you.
Clutch engages and disengages normally. Can't put it in gear with engine running and clutch pedal out. Push the clutch pedal in, plenty of resistance fro the pressure plate as normal, it will go into any gear. Let clutch pedal out and the car just barely moves. Give it some gas with the pedal out and the car doesn't move at all.
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Old 09-22-2020, 03:00 PM   #7
STiWanabe
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---- _________

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Quote:
Originally Posted by Samurai Jack View Post
OK, so . . . are you sure you have the correct size throwout bearing? Wrong size bearing will cause issues like you described.

Have had mechanics install wrong throwout bearing before and when I took it back they couldn't figure it out. I was right there the whole time they kept trying different combinations.

Then near the end of the day I said, " Are you sure you put in the correct throwout bearing? ". Sure enough, that was the issue.
Same size throwout bearing that was in the car and the new bearing came with the correct clutch kit for the transmission.

I'm beginning to wonder if I have a trans/differential issue. I feel like the input shaft is turning but the wheels aren't....
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Old 09-23-2020, 08:45 AM   #8
Samurai Jack
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Quote:
Originally Posted by STiWanabe View Post
I'm beginning to wonder if I have a trans/differential issue. I feel like the input shaft is turning but the wheels aren't....
Get car solidly up on jack stands.
Start car
Have buddy either under car or in driver's seat so one of you can apply gas while the other watches what happens.

You obviously only need a little gas to determine if your suspicions are correct.
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Old 09-23-2020, 10:31 AM   #9
STiWanabe
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---- _________

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Quote:
Originally Posted by Samurai Jack View Post
Get car solidly up on jack stands.
Start car
Have buddy either under car or in driver's seat so one of you can apply gas while the other watches what happens.

You obviously only need a little gas to determine if your suspicions are correct.
Even better, I'll put it on my lift

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