M35a2 lost 2 & 3 gear !

[whatadeuce]

Hello, And while driving upward on an incline I lost 2nd and 3rd gear. At home I took off the tranny top and inspected the forks and fork motions, they seem to operate ok. Dont recognize any damage looking at the gears from the top. Could it be that the fork jumped out ? Peter Mark

 

[pinzgauer pete]

Thinking it is probably a synchro....

 

[doghead]

Thinking it is probably a synchro....

Syncros are used to transition a shift. No power is transmitted through them while in gear.

 

[whatadeuce]

Thanks Guys, And is there something I can recognize , some damage I will be able to see from the top? How can I confirm a bad synchro ?

 

[doghead]

Sycros, are not your problem.

You need to look at all the gears, not just the ones of the top shaft.

 

[DieselBob]

I was thinking maybe the keys for the 2nd ~ 3rd s[FONT=Liberation Serif, serif]ynchronizer sleeve sheared so the sleeve just spins on the main shaft. Just a thought
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[whatadeuce]

Thanks Bob, And this is what John temnis is yelling, I mean, telling me! I wonder If I can try to spin the synchronizer and observe ther shaft from ther top? Well I shall see about all this asap as I dont want to delay my trip too long. Pete

 

[doghead]

Do you start out in second gear often?

You can put the trans top back on, shift it into second gear, then lift the top back off. Start the truck and let the clutch up. Then look to see if the gear is slipping on the shaft.

 

[whatadeuce]

Thank You so much. I am going to do this as soon as I lift the rear axles off the ground. Pete

 

[DieselBob]

There is no reason you couldn't remove the top of the transmission and with the engine idling see if when the transmission is in second or third if the countershaft gears and mainshaft gears are turning. If they are than the keys would be the logical problem. Just be mindful that even at idle the gears will spin fairly fast and throw GO everywhere. All you really need to do is let the clutch out slowly and just enough so the gears just start to turn.

See DH beat me to it..

 

[whatadeuce]

Thank You, And I shall be watchfull when I do any of this...John Tennis has alrready given me a replacement tranny, so Im prepared for that option also. Pete

 

[wb1895]

That is exactly what happened to my deuce last year. I was driving and lost 2nd and 3rd gear. Just replace the main shaft and the gar that 2nd and 3rd ride on. George from White Owl has them and is a pleaser to work with.

 

[whatadeuce]

Thank You, I probably will install the replacement tranny I have, and then rebuild the one at a later date. I have loaded all my trade and automotive tools onto the deuce ( i figure 8000 pounds or better )and im driving down to Ft. Lauderdale to live. Hope i make it . Pete

 

[doghead]

You can swap the rear section of the top shaft without removing the transmission.

 

[whatadeuce]

WOW! I see I shall have to print out the tranny blue prints and read how to do this, and I hope I can. Thanks for the info. Is the correct TM on the forum selection? Pete

 

[doghead]

Tm 9-2520-246-34

 

[Goose2448]

I personally just do a trans swap along with a clutch kit. Cheap insurance especially on a very long drive.

 

[whatadeuce]

I just reviewed the beginnings of TM-9-2520-246-34, and I am not ready for this level of work while the tranny is still installed. Maybe in the future on a well lit table top with no time restraints...