Bitrest clutch fork issues

[Napalm00]

For those who haven't seen I tried to install a bit rest clutch fork in my stumpy r380 today and I found that the pivot point was physically deeper than the stock style fork. The problem with a deeper pivot point is that it reduces the amount of angle that the slave can actually push the fork in and out.

I decided not to install it because I don't think it's going to have enough forward push on the throwout bearing to actually disengage the clutch.

 

[Napalm00]

@MountainD

 

[MountainD]

Awesome—thanks!!

 

[JimC]

What does Mike have to say about this?

 

[Napalm00]

Haven't bothered , too much of a hassle frankly.

 

[erover82]

Haven't bothered , too much of a hassle frankly.

It's in everyone's best interest that you do though.

 

[Napalm00]

you can feel free to send him this thread, ive got enough on my plate thanks

 

[donb]

I'm guessing it is from the plastic bushing that change the geometry. He uses stock clutch forks and then modifies them correct?

 

[Napalm00]

I'm guessing it is from the plastic bushing that change the geometry. He uses stock clutch forks and then modifies them correct?

yea the plastic bushing is further back from the face of the fork then the stock style fork bump depth. its about 8mm? deeper

 

[Napalm00]

i actually just measured it, its ~5mm deeper still not sure if thats the reason. but i do know it does not work for my stumpy trans


I sent an email to him.

 

[RDavisinVA]

For those of you who wondered "bit rest" = Britannica Restorations in Canada.

 

[Adam]

For those not aware of the clutch fork design & issues / resolution

 

[O2batsea]

Matthew would you kindly mike the diameter and length of the release bearing shaft thing? (my stumpy is still up in the truck) I'm hoping to find a hydraulic release bearing. Might need to make an adapter of some sort to fit the stumpy bearing shaft, but I'm sure there's one out there that'll work.

 

[Napalm00]

He reached out and said that the bearing does not need to come beyond the end of the slider for it to work properly. He also offered a full refund and stood behind the product. Good dude

 

[Napalm00]

Matthew would you kindly mike the diameter and length of the release bearing shaft thing? (my stumpy is still up in the truck) I'm hoping to find a hydraulic release bearing. Might need to make an adapter of some sort to fit the stumpy bearing shaft, but I'm sure there's one out there that'll work.

the red line is measured to the full rear of the slider shaft , in some places the weld sticks forward of this measurement


EDIT: also had to do this with a caliper as my micrometer is 1in only

 

[O2batsea]

Thanks a bunch. Now I gotta see if something like this Tilton one would work.

4100-Series Hydraulic Release Bearing (Flat-face)

Made from billet aluminum, Tilton's 4100-Series hydraulic release bearing features a flat-face bearing ideal 8.5" - 11.0" bent finger clutches.

tiltonracing.com

 

[Dan kemper]

I installed one of these awhile back on a full length housing r380. No issues.

 

[Napalm00]

I installed one of these awhile back on a full length housing r380. No issues.

I was fiddling around with it today again and I think it's actually also partially related to the stumpy housing. I might make another video sir but he can see it but when the clutch fork is fully seated it actually grinds on the pushrod side on the inside of the transmission case as well.

 

[Dan kemper]

You likely already have one but I have a heavy duty fork with the the welded bar on took out that you are welcome too. I didn’t realize my set up was already upgraded until I dove in.

I was fiddling around with it today again and I think it's actually also partially related to the stumpy housing. I might make another video sir but he can see it but when the clutch fork is fully seated it actually grinds on the pushrod side on the inside of the transmission case as well.

 

[Napalm00]

You likely already have one but I have a heavy duty fork with the the welded bar on took out that you are welcome too. I didn’t realize my set up was already upgraded until I dove in.

No sweat man, thanks! I also had one