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J.D. 4320 snchronizer slips in the high range


 
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JonS
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Joined: 15 Nov 2012
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PostPosted: Thu Nov 15, 2012 12:37 pm    Post subject: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote

This John Deere 4320 transmission slips in 3,5,7, & 8th gear. It does not do this in reverse or the low range. We have installed a completely new synchronizer. Original issue before replacing the synchronizer was that it would not go into 2, 5, or 8th gear. What could be causing the problem?
 
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buickanddeere
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PostPosted: Thu Nov 15, 2012 12:40 pm    Post subject: Re: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote

Slips ?
Grinding sounds?
 
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ben brown
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PostPosted: Thu Nov 15, 2012 12:48 pm    Post subject: Re: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote

JonS wrote:
(quoted from post at 13:37:33 11/15/12) This John Deere 4320 transmission slips in 3,5,7, & 8th gear. It does not do this in reverse or the low range. We have installed a completely new synchronize. Original issue before replacing the synchronize was that it would not go into 2, 5, or 8th gear. What could be causing the problem?
if you used the complete kit with shifter you probably have the high and low drums revised, don't ask me how i know we all pay for are education one way or the other
 
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JonS
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PostPosted: Thu Nov 15, 2012 12:49 pm    Post subject: Re: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote

It makes a grinding noise when you let out on the clutch.
 
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JD Seller
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PostPosted: Thu Nov 15, 2012 7:57 pm    Post subject: Re: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote

Take the floor pan off and remove the transmission top cover. Look and see what it not engaging all of the way.

Also did you adjust the shift rods after you put it back together??? If not then it may just not be shifting into the high range all of the way and it is grinding. I would adjust the shift rods first. Then remove the top to see what is going on.

The synchronizer can not be grinding. It is the shift collar and shifting drum grinding because they are not shifted all of the way together.

You could have got drum #27 and drum #34 interchanged. They will go together wrong and then not shift correctly.

Also the shifter can be worn where they run on the drum and not be shifting the drum in far enough.

 
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Tx Jim
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PostPosted: Fri Nov 16, 2012 3:12 am    Post subject: Re: J.D. 4320 snchronizer slips in the high range Reply to specific post Reply with quote


If the shifter mechanism on the dash has very much wear(looseness) then that needs to be repaired and as previously stated the shift rods adjusted if not already completed before removing trans cover.
 
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