Usual Jumping Out Of 3rd Gear ?

Thanks Herb.

Cen IA John,

I guess you and I are the lucky ones. I've got a D-10
that my dad bought new and 2 D-14's plus I had another D-10
a few years back. None of them have ever jumped out of gear.
The transmission in the D-10 sounds like a corn sheller but it
stays in gear. It's good to know I'm lucky at something!

Apple:  Depends on amount of damage.  Aside from gears (numbers needed may vary), you may need either an input shaft or pinion shaft (or both) - not available new.  When I rebuild mine (done 3 of them), I usually replace all of the bearings in the tranny as well.  $1000 is on the cheap side to me.  You will not know for sure until you tear down.  

    My D19 jumps out of 3rd gear (and sometimes 2nd) while going downhill, especially with something pushing hard. I can push lightly on the gear shift lever and prevent it from jumping out. It has never jumped out of a gear while pulling. It has only recently started doing this and I never grind gears, though a previous owner could have.
    Do the previous many possible problems and possible fixes all still apply, or does this narrow down the range of problems (and fixes) somewhat? Thanks!
            

LarryBarnett wrote:     My D19 jumps out of 3rd gear (and sometimes 2nd) while going downhill, especially with something pushing hard. I can push lightly on the gear shift lever and prevent it from jumping out. It has never jumped out of a gear while pulling. It has only recently started doing this and I never grind gears, though a previous owner could have.     Do the previous many possible problems and possible fixes all still apply, or does this narrow down the range of problems (and fixes) somewhat? Thanks!

Yes, this is the problem, and the solutions were posted above.  Most affected tractors do jump out of gear going downhill (especially with a load behind it), but my D14 only did it going up hill (without a load).  Either way, the problems in the tranny are still the same.  Holding the gear shift in place can get tiring after a while.  Yes, even though you are easy on the transmission, previous owners probably were not.

I have a 1959 d17 doesn't jump out of gears. A 1957 D14 that also doesn't jump out of any gears. A D19 that has jumped out of third since the day we bought it in about 1999. When I'm in third and starting to go downhill I put my hand on the shifter and it stays in gear. Doesn't take much force just a little pressure. Thinking about trying the detent fix on an extra shifter I picked up for the purpose.

As read, one source of potential cause for jumping is the grinding of gears. My D17 seems to take a long while to "relax" to slip the shifter into gear.  Doesn't seem to matter.. It is sometimes hard to get into all gears.  We never try to grind the gears, but sometimes when we stop to shift gears..it grinds and reminds us we have to wait.  Is there anything that may cause the transmission to keep running but the tractor to stop normally with the clutch pedal.   I do know... do not even try until the brush hog COMPLETELY comes to a stop.  otherwise grinding for sure..  I just think sometimes it takes forever.. 

jbelow2 wrote: As read, one source of potential cause for jumping is the grinding of gears. My D17 seems to take a long while to "relax" to slip the shifter into gear.  Doesn't seem to matter.. It is sometimes hard to get into all gears.  We never try to grind the gears, but sometimes when we stop to shift gears..it grinds and reminds us we have to wait.  Is there anything that may cause the transmission to keep running but the tractor to stop normally with the clutch pedal.   I do know... do not even try until the brush hog COMPLETELY comes to a stop.  otherwise grinding for sure..  I just think sometimes it takes forever..

The pressure plate assembly was bad in my 615 making it difficult to shift.

oldorangeiron wrote: I am doing my D14 with factory parts. My pinion shaft gears and collars were all in bad shape. I can tell you that 2000 dollar figure above is about spot on. Here is a picture of where the damage occurs, before disassembly. I will post pics over the coming days of the process. This shows the pinion shaft, if you look carefully at the gears, you are able to see rounded edges where the collars slide over to engage the gear, it's there that the problem is usually caused, not the gear teeth themselves, also, its hard to see the teeth on the collars, but they wear as well.:

I have a friend that has a L600 D15 that is jumping out of 1st gear. Can you get to the gears for repair without splitting? is this possible?

Edited by Dennis IL - 26 Mar 2015 at 3:36pm

My uncle and dad ran an Allis Chalmers dealership in the 1960's, and my dad helped me rebuild the transmission in my D-15.

He told me that third gear was a problem in the D-10, D-12, D-14 and D-15 tractors. It is due to grinding of the gears when shifting as is said above, and my dad said it was more prevalent in 3rd gear because it was a common gear used for working land.

He told me that when you replace 3rd gear you should always replace the reverse gear. 3rd gear pinion teeth lock into the reverse gear. If you only replace one gear you only replace half the problem. Other gears lock into a shifter collar as pictured in several posts above not into a gear. Because of the fact you are replacing two gears when repairing 3rd gear it is a more expensive repair.

As mentioned above you can get the gears from AGCO. They are pricey, and I agree with the 2000 dollar price given above for AGCO gears. You can get aftermarket gears from some resources.

However, when I rebuild my D-15 transmission I bought all of them except 4th gear pinion shaft from AGCO or as luck would have it some items came from the old Allis Chalmers dealership that my dad and uncle ran. Yep, they were still in the shelf in the cans! The after market 4th gear pinion had a different look to the metal than the original Allis Chalmers or AGCO gears. Is that good or bad? I won't say, but they are obviously different. Because of that I think that AGCO is the way to go for transmission parts.

On a 190xt does the tractor need split? Also will the gears from a 190 work inside a 190xt III?

Thank you Mr Jones!

On the 185 some adjustment are done by removing the shifter cover but that gets pretty complicated. Some change or move the shifter rod indents for spring and ball by re welding them and then re drilling over a bit.    

This is all good. Keep doing that.


Thank you for sharing and updating!

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How do you adjust the detente? We have the same issue with our D14