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Old 01-22-2021, 01:16 AM   #1
Crazyced
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Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default DCCD binding issues, not electrical

I'm running a V8 JDM 6MT with DCCD ran by a DCCDpro in my GD rallycross car. The transmission is used quite hard and has been through a few broken axles.


That being said, there is something wrong with my DCCD. Even with the controller disconected from the transmission, the diff stays locked. With the car fully in the air and the hand brake on, clutching out in 1st kills the engine. DCCD solenoid reads 1.9ohm on the multimeter.


I think the issue might be one of 2 possibilities:


-Clutch plates have warped/stuck togeter due to abuse.
-A planetary pin is backing out and putting pressure on the clutch pack.


Apparently the pins backing out is a 'common' problem with these but not much info out there about it. I found this:
https://fb.watch/3a9GEnSGCF/


Anyone else has had a binding DCCD issue that was mechanical? What was it?
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Old 01-22-2021, 05:40 PM   #2
Crazyced
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Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

Here's another post:
https://forums.nasioc.com/forums/sho....php?t=2894722

What do people do to prevent those pins from coming out?

Last edited by Crazyced; 01-22-2021 at 05:50 PM.
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Old 02-08-2021, 08:02 PM   #3
Crazyced
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Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

Bump, nobody?
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Old 02-15-2021, 02:57 PM   #4
04stigeorge
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Join Date: Apr 2008
Chapter/Region: E. Canada
Location: Ontario
Vehicle:
2018 STI and 08WRx
gun metalic

Default

Quote:
Originally Posted by Crazyced View Post
I'm running a V8 JDM 6MT with DCCD ran by a DCCDpro in my GD rallycross car. The transmission is used quite hard and has been through a few broken axles.


That being said, there is something wrong with my DCCD. Even with the controller disconected from the transmission, the diff stays locked. With the car fully in the air and the hand brake on, clutching out in 1st kills the engine. DCCD solenoid reads 1.9ohm on the multimeter.


I think the issue might be one of 2 possibilities:


-Clutch plates have warped/stuck togeter due to abuse.
-A planetary pin is backing out and putting pressure on the clutch pack.


Apparently the pins backing out is a 'common' problem with these but not much info out there about it. I found this:
https://fb.watch/3a9GEnSGCF/


Anyone else has had a binding DCCD issue that was mechanical? What was it?
Cover the Basics such as making sure the tire circumference is equal to all 4.
no issues with vss on each wheel.. fwiw pull and inspect the dccd
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Old 04-16-2021, 11:25 AM   #5
Crazyced
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Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

So here's an update. I finally pulled the DCCD to inspect it. As I suspected some planetary gear pins had backed out. 3 to be exact. You can see the marks on the disk.


It's a bit easier to see the recessed pins on this side:


I have to figure out a way to push them back in and make sure they stay put.

Last edited by Crazyced; 11-08-2021 at 10:02 PM.
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Old 07-16-2021, 12:19 PM   #6
Crazyced
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Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

So I ended up getting the carrier to a Subaru shop that tacked the pins with TIG welds.


I also bought a Mooresport DCCD clutch pack to replace the worn plates.


Looking forward to see how the car behaves now.

Last edited by Crazyced; 11-08-2021 at 10:06 PM.
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Old 09-12-2021, 06:55 AM   #7
snow_bound26
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Join Date: Jul 2014
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Location: SLC and Lake Placid
Vehicle:
2005 92x Aero
Beige

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Quote:
Originally Posted by Crazyced View Post
So I ended up getting the carrier to a Subaru shop that tacked the pins with TIG welds.


I also bought a Mooresport DCCD clutch pack to replace the worn plates.


Looking forward to see how the car behaves now.


I'm looking at the same repair. How has everything held up so far? How do the MSI plates compare to the OEM ones? Wondering if they are worth the extra $100
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Old 11-08-2021, 10:09 PM   #8
Crazyced
Scooby Newbie
 
Member#: 378119
Join Date: Jan 2014
Chapter/Region: E. Canada
Location: Ottawa
Vehicle:
2004 Impreza WRX
World Rally Blue

Default

Quote:
Originally Posted by snow_bound26 View Post
I'm looking at the same repair. How has everything held up so far? How do the MSI plates compare to the OEM ones? Wondering if they are worth the extra $100
So far so good but the car hasn't seen much use since. Issue is definitly fixed however. I couldn't tell how much better if any the moorsport stuff is as it't mostly durability changes.
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