Hi guys n gals,
my wonderful old work van has issues. Straight 6 and a 4 speed trans. Clutch pedal needs to be pushed all the way to the floor and the shifting is getting difficult. Reverse is either shut-off-engine-shift-into-reverse-start-again, or grind and jam.
Anyway to tell if my trans is going or it's just the clutch?
Hope one of you can help...
Thanks in advance!

 

adjust the clutch first

 

Thanks but...hydraulic master/slave

 

Clutch no doubt! Forward gears are helical cut and with sycro's you can get it in, but reverse is straight cut gears, so trying to get into reverse with the main shaft still spinning would be impossible. That's why you have to shot the engine off, stop the input shaft from spinning and in it goes. On the hydraulic clutch, under the dash were the pedal meets the rod and then another lever hooks up to the clutch master, they have plastic bushings on them in those 2 spots if there smashed or even missing you lose a good bit of travel, which could be giving you the problem, make sure those bushings are ok, gotta jam your head under there but as you hit the clutch with your left hand you will see what I am talking about. Does the clutch grap as soon as you start to lift your foot? or do you have room before she engages, could be the pilot bearing binding, I dont know if you have a bearing of a bronze bushing. but if that binds it will give you the same result, input shaft spins cause it's tight in the crankshaft. But if it grabs at the floor and your bushings are good time for a new clutch disk at the least, might as well do it all, machine the flywheel, new pilot bearing, throw out bearing, and pressure plate, vans are easy, plenty of room from top and bottom, take out the driveshaft and slide the trans back a foot and you have room to work. Good luck

 

I'm not familiar with this exact application.
Are you saying there is no rod to adjust on the master cyl. or on the clutch linkage? Or is it a hydraulic throwout bearing ?

And

have you bled it?

 

That's not how a manual transmission works. The cut of the gear teeth have nothing whatsoever to do with how it shifts. The gears are meshed at all times, no matter what gear the shifter is engaging, they're all meshed at all times, except for reverse. The syncros are engaged with a slider that moves to engage the blocker rings with the syncro teeth on the gears. The slider is locked to the main shaft (splined to it actually, the gears spin freely on the main shaft. The grinding you hear when a shift is missed is the syncro teeth and the blocker rings getting ground down by the slider. Helical cut gears run quieter, that's the only reason they're cut that way. And also the reason reverse is noisy, due to the straight cut gears.

 

It's got a hydraulic master cylinder and a slave cylinder inside the bellhousing, there's no adjustment there. When the clutch disc is worn out, it has to be replaced.

 

The slave cylinder should be out side the bellhousing on the manual transmissions unless it's a 5 speed or aftermarket.

 

I've never seen a slave cylinder inside a bellhousing , just hydraulic throwout bearings. Please tell me where you have seen this. I'm curious.

 

Now y'all are nitpicking. A hydraulic throwout bearing is a slave cylinder. You have a "master" cylinder and a "slave" cylinder which is the throwout bearing assembly. And yes, it is a doughnut shaped cylinder pushing on the throwout bearing that makes it operate. I know of no other hydraulic devices that are not cylindrical in shape. If there are some out there, please show us what they look like.

 

No. it's not the same whether you think so or not
anyone who is a mechanic knows that



Pictures say it all
I have no need to debate you.

 

Actually the ones on the 5spds ( inside the bell housing ) are called a "concentric slave cylinder" . I've had the privilege of getting to replace a few of them.

 

Well, I AM a mechanic so I'll ask myself, "Do they do the same job" ? Yep, so while they may not "look" the same, they Do serve the same function, so in effect they are both "slave" cylinders. You have no need to debate me because you're wrong.

 

I rest my case.

 

using that logic , oil and KY are the same thing