Any aftermarket clutch forks??

25396 Views 63 Replies 29 Participants Last post by clsmooth, 8 d ago

maxiav

Discussion Starter · Nov 1, 2008

I cant find an aftermarket clutch fork. Seems a bunch of people have had issues with the forks breaking... with ACT clutches.

Im upgrading my clutch from ACT to something that will hold over 400WTQ and was looking to upgrade the fork as well... to avoid being stranded down a road.

May be Paranoid Fabrications wants to make a clutch fork??? any other fabricators out there?

Suggestions?

1 - 20 of 64 Posts

Major Johnson

· #2 · Nov 1, 2008

My fork broke with what I think was an OEM clutch. It sucked. I didn't really know anyone ever made aftermarket forks.

FuJi K

· #3 · Nov 2, 2008

I know that NEW '06+ push types are A LOT beefier. You need to run their throwout bearing though.

Skidd

· #4 · Nov 2, 2008

2

I bought a used OEM clutch fork, and had it re-enforced by a welder friend of mine prior to pulling my engine. He just added a little steel, a few beads with a MIG and some grinding, and it looks pretty strong to me.

Before & After

(Link to photo page)

P.S. I still have the old OEM fork if you find yourself in the market for a new one to weld up before ripping down your engine.

See less See more

2slo4u

· #5 · Nov 2, 2008

I feel sorry for the poor main bearings when using a clutch setup stiff enough to require a reinforced fork, lol. Do the stock forks ever crack when using stock clutches? I was also thinking of getting mine reinforced before I install the engine and transmission. I'm only using an exedy clutch set though.

Arch4life

· #6 · Nov 2, 2008

so wait if i am going to be using the 06 clutch and flywheel and throw out bearing on the rs trans, i will need a new clutch fork?

arent the clips the same?

also, andrewtechautomotive sells billet forks... not sure if its for the rs...

2slo4u

· #7 · Nov 2, 2008

Pretty sure you're going to need an RS clutch set,fork, and flywheel if you're keeping your RS transmission. The wrx's have a different type of fork that mounts to the transmission with a swivel type of connector. The RS's have a pivot ball type fork.

Arch4life

· #8 · Nov 2, 2008

http://www.rs25.com/forums/showthread.php?t=60969&highlight=06+clutch

it seems its been done, it just isnt clear if the rs clutch fork or the wrx clutch fork is used.

2slo4u

· #9 · Nov 2, 2008

Read post 22 through the last before you get too excited. Maybe pm Fuji to see if he's got any news.

2slo4u

· #10 · Nov 2, 2008 (Edited)

You'll notice I also posted in that thread a while back, still waiting on news.

Arch4life

· #11 · Nov 2, 2008

and thats why in post 2 or 3, rs clutch fork and throw out bearing works on legacy gt trans?

so i guess your age old addage might not hold true.. and wedge (in that same thread) seemed to be able to install the 06 wrx flywheel/clutch/pp combo..

so yes, im plenty excited.

2slo4u

· #12 · Nov 2, 2008 (Edited)

Arch4life said:
and thats why in post 2 or 3, rs clutch fork and throw out bearing works on legacy gt trans?

so i guess your age old addage might not hold true.. and wedge (in that same thread) seemed to be able to install the 06 wrx flywheel/clutch/pp combo..

so yes, im plenty excited.

There is no "age old addage", and I wasn't saying not to get excited, just not "too" excited, lol. Believe me, you aren't the only one who would like to use a wrx clutch set, I've got an ej20k that's going to be running on an exedy stage one RS clutch set, and its totally going to be slipping. Looks like Fuji is running a 6 speed now. Someone else who's running WRX clutch stuff on their RS transmission needs to chime in with their results.

Arch4life

· #13 · Nov 2, 2008

well i've seen some responses from andrew at andrewtech about the clutch fork differences, and apparently the 06 clutch fork uses a different pivot point.

fortunately, it is likely the rs trans (like every subaru part in the world it seems) already has the spot for that point, and its possible that with the pivot point switched, the new fork can be put in place.

worst case, i'm almost willing to bet the rs fork and throwout bearing will work with the wrx clutch. (dia's and such are likely the same) THEN the only problem/question, is will the clutch fork break

FuJi K

· #14 · Nov 2, 2008

The '06 WRX throwout bearing is a little different than our NA throwout bearings. They BOTH are push type. You can use your RS clutch fork with the '06 WRX clutch/FW combo. I'm thinking you could also use the '06 WRX clutch fork. I'm not sure if Subaru moved the pivit ball in the bell housing or not as they are still both hydralic style.

The cable clutch setups pivit ball joint sit a little further away.

'02-'05 has a rod that goes through the fork; pull type.
'06+ pivits on a balljoint.

I used my NA clutch fork w/ provided throwout bearing from ACT. Only thing that wasn't right was the flywheel. At the time everything was NEW, and I think they didn't have the '06 WRX FW and sent me a '02-05 WRX pull style flywheel. The '06 WRX FW has a step DOWN where the disc mates with the FW. The one they gave me didn't and it was in fact one for the pull style clutch. This is why the pressureplate was still clamping onto the disc and not allowing it to let go.

2slo4u

· #15 · Nov 3, 2008 (Edited)

I thought the 02-05 had the stepdown and the 06 and up were flat like the n/a flywheels...? So exactly which clutch/flywheel combo is supposed to work? I notice two different exedy flywheels, ff501 and ff502 for the 04-07 wrx.

FuJi K said:
The '06 WRX throwout bearing is a little different than our NA throwout bearings. They BOTH are push type. You can use your RS clutch fork with the '06 WRX clutch/FW combo. I'm thinking you could also use the '06 WRX clutch fork. I'm not sure if Subaru moved the pivit ball in the bell housing or not as they are still both hydralic style.

The cable clutch setups pivit ball joint sit a little further away.

'02-'05 has a rod that goes through the fork; pull type.
'06+ pivits on a balljoint.

I used my NA clutch fork w/ provided throwout bearing from ACT. Only thing that wasn't right was the flywheel. At the time everything was NEW, and I think they didn't have the '06 WRX FW and sent me a '02-05 WRX pull style flywheel. The '06 WRX FW has a step DOWN where the disc mates with the FW. The one they gave me didn't and it was in fact one for the pull style clutch. This is why the pressureplate was still clamping onto the disc and not allowing it to let go.

FuJi K

· #16 · Nov 4, 2008

2slo4u said:
I thought the 02-05 had the stepdown and the 06 and up were flat like the n/a flywheels...? So exactly which clutch/flywheel combo is supposed to work? I notice two different exedy flywheels, ff501 and ff502 for the 04-07 wrx.

'02-'05 are FLAT. '06+ push style are step down. Seen this step on both '06 WRX's. Never seen a step on the '02'-'05. However the 6spd is like a step.

darkevildrifter

· #17 · Feb 4, 2009

Skidd said:
I bought a used OEM clutch fork, and had it re-enforced by a welder friend of mine prior to pulling my engine. He just added a little steel, a few beads with a MIG and some grinding, and it looks pretty strong to me.

Before & After

(Link to photo page)

P.S. I still have the old OEM fork if you find yourself in the market for a new one to weld up before ripping down your engine.

Thats not even where it breaks so you just wasted your time...

qstarin

· #18 · Feb 4, 2009

darkevildrifter said:
Thats not even where it breaks so you just wasted your time...

Great. So where does it break then?

Wedge

· #19 · Feb 4, 2009

Just to give some info. Couple of us down here have gone through clutch forks as well. The legs breaking, and also putting a hole through the pivot ball (no joke).

compression

· #20 · Feb 5, 2009

Wedge said:
Just to give some info. Couple of us down here have gone through clutch forks as well. The legs breaking, and also putting a hole through the pivot ball (no joke).

That is insane, what clutches is this happening with?
Are you lubricating all the fork pivot points when you install them?
If your clutch fork has to press soooo hard that it breaks itself, imagine the insane loading on the crankshaft thrust bearings!
If this is because of high-clamp load pressure plates, you might try a multi-disc clutch instead. They have less clamping pressure, but more surface area to make up for it (and then some).

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