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Why do we replace pressure plate when replacing clutch?

Old Dec 4, 2002 | 02:48 PM
  #1  
ericdwong's Avatar
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Why do we replace pressure plate when replacing clutch?

As I'm researching clutches, this makes me wonder why do we replace the pressure plate when we replace the clutch. I read on the newsgroups that usually a pressure plate wont fail unless it breaks, or the springs become too weak to apply pressure. Im trying to find a suitable clutch to replace mine with that wont blow the tranny to shreds. These pressure plates are expensive as *****.

And please do not respond with "just sell the car".
Old Dec 4, 2002 | 03:10 PM
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Just sell the car! Well Eric it depends. MOST people put a good amount of miles in their clutches before the replace them. By that time, the tangs on the PP get weak. You "might" be able to put a low mileage PP back on w/ a new disc BUT what happens when the PP prematurely wears out when you gotta dig into the tranny again? You should always use new parts because it's too much of a pain to drop the tranny everytime.
Old Dec 4, 2002 | 03:48 PM
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The pressure plate is what provides the force that sandwiches the clutch disk to the flywheel. As it gets old, the pressure or force it applies gets weaker. The weaker it gets, the more your clutch slips. The pressure plate and friction disk should always be replaced as a set.
Old Dec 4, 2002 | 04:01 PM
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Ramius83
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Just a quick question, but are the ACT and OEM pressure plates the same? Reason I am asking this is because I had a JWT Stage II and the splines on the PP were MUCH smaller and were also shorter. Now the OEM PP and the ACT PP appeared to be the same. The JWT disk blew out in 1200 miles and when my ACT clutch wears out next time, do you think I can use the JWT PP and just buy an ACT Street Disk?

BTW, sorry to ***** up your thread Eric, but I know that all the tranny freaks will be in here reading this....
Old Dec 4, 2002 | 04:05 PM
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Originally posted by njmaxseltd
The pressure plate is what provides the force that sandwiches the clutch disk to the flywheel. As it gets old, the pressure or force it applies gets weaker. The weaker it gets, the more your clutch slips. The pressure plate and friction disk should always be replaced as a set.
Also, the face of the pressure plate wears as the clutch disc wears, almost like a brake rotor.
Old Dec 4, 2002 | 04:19 PM
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Originally posted by Ramius83
Just a quick question, but are the ACT and OEM pressure plates the same? Reason I am asking this is because I had a JWT Stage II and the splines on the PP were MUCH smaller and were also shorter. Now the OEM PP and the ACT PP appeared to be the same. The JWT disk blew out in 1200 miles and when my ACT clutch wears out next time, do you think I can use the JWT PP and just buy an ACT Street Disk?

BTW, sorry to ***** up your thread Eric, but I know that all the tranny freaks will be in here reading this....
The ACT pressure plate is a stock plate that is modified to have A LOT more holding force, I wouldn't mix the JWT PP with the ACT disk.
Old Dec 4, 2002 | 09:05 PM
  #7  
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Re: Why do we replace pressure plate when replacing clutch?

Originally posted by ericdwong
As I'm researching clutches, this makes me wonder why do we replace the pressure plate when we replace the clutch. I read on the newsgroups that usually a pressure plate wont fail unless it breaks, or the springs become too weak to apply pressure. Im trying to find a suitable clutch to replace mine with that wont blow the tranny to shreds. These pressure plates are expensive as *****.

And please do not respond with "just sell the car".
Contact Star Performance Engineered Clutches (SPEC). They're in
Alabama and make a great product for a great price.
David @ SPEC
800-828-4379 or starclutch@mindspring.com

Good luck!

Cheers,

Joaquin
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