Hey guys,
I got this donor truck for my f350 gas to idi swap and it's also getting a zf5. The only problem with the donor was that I guess the clutch wouldn't disengage to be able to put the transmission in gear while running. It has a new slave and what looks like a new master cylinder but there was the plastic package retainer nub on the end of the slave cylinder shaft in between the fork and the shaft. Is there supposed to be a adjuster nut or something that goes on the end of the shaft? It seems like it should because the shaft is threaded.

 

Do you have any pics? The plastic nub is normal, it allows you to install the slave while it's in the compressed position.
But I've never seen a threaded push rod on the slave on these systems.

 

The donor truck could have had a firewall flex issue as well. That is a very common issue with these trucks. It can also be difficult to bleed the system.

Both of those could mean the slave and master were fine.

Like Chevy Eater said, the plastic nub is supposed to be there. Not only does it help hold the piston into the slave during install, it also acts as a thin spacer that is required. It also helps to reduce the friction and reduce wear to the shift fork and slave cylinder push rod.

The push rod shouldn't be threaded, a picture would help. Perhaps the previous owner tried to fix one of the aforementioned problems by making an adjustable push rod (or swapping one in from something else).

 

Here is a picture of the slave cylinder



Slave cylinder with threaded shaft

 

Oh yeah, that's not stock. That's either a bolt or a piece of all-thread.

 

What's the length of the stock one then?

 

Bump......

 

Um... no idea. I would offer to go measure mine tomorrow, but knowing me, I'll forget that I even offered in about 10 minutes. You can get a good, inexpensive replacement from RockAuto though...

 

Haha thanks... that doesn't help but it's the thought that counts. Replacement rods or cylinders? I've only seen Rods on lmc truck. Overpriced.

 

Full slave cylinders. Technically I think that any Ford slave cylinder push rod should work, but even I would double check that statement before I trusted it.

 

I have no clue why, but when this thread came back up I went out in the garage and dug one out and measured it. 4 5/16"

 

Thanks Chevy eater. I'll measure it when I get back to it.

 

Because deep down, you were being a decent person responding to a request for help.

 

Unfortunately no good deed goes unpunished so I'd better watch my rear for a bit.

 

Huh... mine measures around 4 3/4"