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KM132 Tranny in gear while in neutral


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#1 SkyComanche

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Posted 16 November 2019 - 09:02 PM

I pulled the transmission and replaced the input shaft bearing. reinstalled it with all new clutch components. The clutch works great, but the transmission won't work properly.

I cannot shift into 1-4th gear, but I can shift into 5th and reverse. it's like this with the engine running as well as not running. In neutral, if you let out the clutch then the wheels turn forward but if it's in fifth or reverse the engine will die.

I can't tell what's wrong with it, any help would be appreciated.
Feel free to ask for more info.

Edited by SkyComanche, 16 November 2019 - 09:12 PM.






#2 mars88star

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Posted 16 November 2019 - 09:39 PM

sound like you knocked something loose in the transmission....pull it back out and retrace your steps double check everything you touched

#3 SkyComanche

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Posted 16 November 2019 - 09:45 PM

The only part of the tranny that I replaced was the input shaft bearing, nothing else was done other than taking out the old bearing and putting in the new one. When replacing the bearing could there have been a shift fork that I bent perhaps?

#4 mars88star

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Posted 16 November 2019 - 09:53 PM

pull it back out...I bet its something stupid

#5 mars88star

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Posted 16 November 2019 - 09:55 PM

pull the slave cylinder out....the clutch fork has a rubber grommet pull it out and look in there see if anything is laying in there

#6 ucw458

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Posted 17 November 2019 - 12:11 AM

It sounds like the shift forks got knocked out of position.  You may be able to drop the trans pan and manually move them back.  With the shifter in neutral the forks should all be in the middle of their range.

I had a similar thing happen on a Toyota R150f transmission.  Standing it up on the bellhousing and tapping the transfer case coupler onto the trans output caused the reverse gear assembly to drop into gear.  The shifter was in neutral at the time so it locked the shifter and was stuck in reverse.  Thankfully that was an easy fix.  Remove the reverse light switch and pry reverse back into neutral with a screwdriver.
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#7 croquest87

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Posted 17 November 2019 - 08:28 AM

https://youtu.be/vOo3TLgL0kM

Some good watching on how it all works.

Enjoy

#8 kev

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Posted 17 November 2019 - 10:22 AM

Your main shaft is no longer aligned to your input shaft.  The reason why 5th and reverse work is they are the most rearward gears.  If I had to guess, you inadvertently dropped the roller bearing between the input and main shaft when you pulled the input shaft to replace the bearing.   You need to pull it back down.  

How worn was the input bearing?  If it was really bad, it most likely caused damage to the other bearings, synchronizers, and shift forks.

#9 SkyComanche

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Posted 17 November 2019 - 12:58 PM

thanks ucw458, I pulled the pan and the shift lever was put into gear while I was working on it earlier, it easily went into neutral and works great now!

#10 kev

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Posted 19 November 2019 - 03:36 PM

Cool!  Glad it turned out to be so simple.  Thanks for posting the resolution!

Kevin




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