6500 4wd transmission

[SPYDERLK]

Spyderlk, I have about 1200 hours. Probably 65% has been loader work.

Yeah, Im there. Loader work constantly taxes the synchros and gives plenty of opportunity for wear or an accidental stress that could break them. One of my sync directions went out instantly or was delivered that way. Since I was a bit careful with it in newness I didnt register the difference in the two directions for a little while. Then I did, but didnt want a good shifting trans messed with at 100hrs. Then when I was useing it cycling quickly in the manure pile the other one went out suddenly. Night/day difference -- probably split. Trans is still operating well at 1300hrs. My tractor is used for its strong loader about 90% ... manure pile, debris piles, forrest work, clearing, excavation.
... Im disappointed in the syncs. Ill sure be interested in what you find inside yours.
larry

 

[Bobvt]

The gears are out. The problem appears to be one of the two tapered ring gears in the forward/reverse syncro. gears. These are very narrow gears. The inside of the ring is tapered and is lined with a material similar to a brake pad. Upon shifting to either reverse or forward, pressure is applied to one of these gears brakes the driven gear so it turns at the same speed as the drive gear. The brake lining material in one of the rings was worn much more than the other. To be on the safe side, I going to purchase the complete synchronizer kit instead of the two tapered gears (additional $250).

 

[SPYDERLK]

So yours wore out with all the back and forth. I know one of mine broke/spit, allowing the cone to open, because it was a sudden appearance of grind.

 

[farmbacker]

I know this is an old thread, but I'm hoping Bobvt is still hanging around.

I am trying to remove the transmission shaft (to replace inner shaft seal) and synchronizers (because no teeth left on front ring) from the 6500 4WD transmission, and I can't for the life of me figure out how to get the shaft out. Tractor is split and trans is open from the top. I was also starting to think I would need some special tool to remove the hi/lo gears and shaft, but it seems Bobvt found a better way. I agree that the service manual is not very clear when it comes to the 4WD trans.

Any chance Bobvt or somebody else could give me a clue on how to proceed?

 

[farmbacker]

This is what I'm looking at, if that helps at all. Let me know if more pictures would be helpful.

 

[farmbacker]

Just in case anyone's interested... I was able to remove both PTO and trans shaft, both of which need to come out to replace synchro. The short version is:

1. Remove reverse gear shaft - drive out roll pin, remove lock bolt from outside trans house, thread bolt into plug on front of trans housing and pull out. You'll need a magnet to retrieve pieces that fall to bottom of trans housing. Let the gear sit off to the side.

2. Remove shift shafts and forks from right side of trans. You should now be able to pull out hollow trans shaft. It might not seem like it will come out, but it will.

3. To remove the rest of the synchro, PTO shaft needs to come out. Remove PTO engagement lever from right side trans housing, disengage inner lever from collar. Curse and spit a bunch while removing stupid snap ring from engagement collar. Remove band retaining springs and detent balls. Drive out roll pin.

4. Pull PTO shaft forward. Remove rest of synchro from top.