My 4 speed manual stuck in gear? - Page 2
 

My 4 speed manual stuck in gear?

Started by Carbone, April 10, 2012, 02:15:26 PM

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Jaime

I used to start with the clutch depressed until I read in the operators Manuel that depressing clutch prevented correct lubrication of the rear main bearing by forcing the crank shaft forward prior to oil pressure build up. Don't know if its true or how many start it would take to have an effect.

Carbone

Unhooked the linkage, messed around with it for a while, figuring out that the extra hole over the transmission is probably just for this situation. Seems awfly convenient. Any advice for this stage? I have rocked the shift levers back and forth and cant seem to get it un-stuck. Thinking about pulling it (the bus) forward a few feet to see if that helps me out. That might unlock or line up what needs to happen.... On a positive note, I got the sub floor installed.
1975 MCI-8
8V71 4 on the floor

gus

The clutch needs to be released, then it isn't too hard.

Disconnecting the levers is not necessary if the problem is actually with the trans and not the linkage.
PD4107-152
PD4104-1274
Ash Flat, AR

bevans6

Make sure it isn't stuck in reverse - the reverse rail can hang up sometimes.  Look at where the linkage from the reverse solenoid engages onto a rail on the passenger side of the trans - that rail should be tight against the housing but you should be able to lever it out a half inch or so if the gearbox is in neutral.  The transmission uses the one/two lever to shift both first and second gears, and reverse.  When you hit the toggle switch for reverse, the solenoid pulls the rail that the one/two lever is on over a half inch, and it moves from working the one\two shift fork to moving the reverse shift fork.  You should be able to move it with a little pry-bar left and right, and see what I mean.

With the shift linkage off, you should be able to shift into all the gears, and if you are in a gear, the other lever should be locked.  If the box is in neutral, the shift levers should be at 90 degrees (vertical, in other words) relative to the transmission top.  If a gear is engaged, they lean forward or back about 15 degrees from vertical.

Now, if you can move the shift levers back and forth by that 15 degrees, one at a time (checking that the other lever is locked when the one is moved into gear) and you can feel them click into the locked in gear position, then it's possible the transmission is fine and the problem is elsewhere. 

Brian
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia