I have progress....kinda...

DBrown · Post by **DBrown** » Thu Mar 24, 2005 3:25 pm

ok, this is probably going to be a question for Matt but here it goes....

installed the 75 toy slave today and it works.....but there is only about 4" of pedel theat actuates the tranny. that dosen't bother me because I will get used to it. the problem is I was moving the truck around in all the gears in the back yard and BOOM! the master cyc. for the clutch exploded into 3 pieces......so I have come to the conclution that one of two things is wrong:

1. 20yr old plasic finaly bit the dust

2. too much pressure in the arem of the tranny

I guess my question is how much throw and pressure is in yours?
I replaced the part and it is working again but it is still really tight.

Post by **Nobody** » Thu Mar 24, 2005 3:54 pm

I don't know what to say. My peddle is a little hard, but nothing I think would cause a problem. In fact mine has been working flawlessly for years now. My wife drives it with no complaints.

I have full peddle travel.

So you are using stock BII peddle assembly and master with no changes.......correct??

That would lead me to suspect something with the slave or clutch fork arm. Got any pictures of how you set that up? Something doesn't sound right for sure.

DBrown · Post by **DBrown** » Thu Mar 24, 2005 5:31 pm

yeah, I'm using the stock BII peddle and master......after I asked the question I started to think and I changed the arm so that it is farther away from the rotating point of the bracket. it is pretty stiff still but it feels better and I am at about full range of the peddle like you are explaining. one thing I did think about was how it felt in the 79 with the mechanical setup and if feels close. the master was like $50, and I didn't really plan on buying that so it is hurting my pocket now.

I couldn't do the type of bracket you did because of the motor I am running. the 351M is wider at the bell housing so there is not much arm extending past the bell. so I had to use the rotating part of the z bar setup and weld another bracket on that and mount the slave pointing down. My camera is hinding from me at the minute but I will post some pics when I find it. is there anything you could compare the stiffness of the clutch to?

Post by **Nobody** » Fri Mar 25, 2005 10:24 am

I'd have to see what you did, but it sounds like the pivot isn't a 1:1 ratio and is causing your problems.

ranger5.0 · Post by **ranger5.0** » Fri Mar 25, 2005 9:15 pm

You blew up the master resivor or the whole unit

I would think that if you blew up the master cylinder and piston that your slave is fully extended before your pedal has reached the floor. And since the master is aluminum it is the weakest link because the hydrualic oil has no where else to go.

DBrown · Post by **DBrown** » Sat Mar 26, 2005 9:05 am

I blew up the master cyc where the ears hold it to the firewall. I think it was a combanation of too much pressure and old plastic. I might try to push the arm out a little more to se if I can get a softer peddle. the one on the BII's are plastic. I will get some pics up soon I am still trying to track down my camera.

ranger5.0 · Post by **ranger5.0** » Sat Mar 26, 2005 12:16 pm

That's right I forgot about the plastic master. Definetly sounds like not enough throw to the slave.

DBrown · Post by **DBrown** » Sat Mar 26, 2005 4:32 pm

well, I have great news......I changed the length of the arm to extend about 3/4" more and altered the slave bracket and it is fixed!

man, it feels almost like the old clutch, just a little stiffer but now almost the entire peddle is actuating the arm the way it should. I think it boiled down to readjusting the mechanical adjustment that goes to the arm and the slave to close to the piviot point. moved it around the yard and played a little in the backyard. thanks for the help!

I will get some pic up of the set up as soon as I get the camera back from my mother in law.

ranger5.0 · Post by **ranger5.0** » Sat Mar 26, 2005 10:33 pm

mekcanix · Post by **mekcanix** » Sun Mar 27, 2005 5:30 am

wow i had up until now never heard of them blowing up failing yes but blowing up wow i will have to re think for the tranny swap i was gonna use my stock master but now i wonder i think a trip to the wreckers is in order

DBrown · Post by **DBrown** » Sun Mar 27, 2005 7:23 am

well, it blew up because I had it set up wrong. I would recomend using the same parts to anyone, just to maybe be more careful than I was.

DBrown · Post by **DBrown** » Mon Mar 28, 2005 3:46 pm

where are some pic's of the setup:

DBrown · Post by **DBrown** » Mon Mar 28, 2005 3:49 pm

you can see that as the slave pushes the bracket rotates and actuates the fork. it works well, and you even have some adjustment with the rod that connects the bracket and fork.

ranger5.0 · Post by **ranger5.0** » Tue Mar 29, 2005 9:43 pm

Nice engineering

DBrown · Post by **DBrown** » Wed Mar 30, 2005 7:53 am

thanks, I thought about it for a long time before I made up my mind on how I wanted to do it. it just seemed like the most practical way.