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Discussion Forum

WD-45 Jumps out of 3rd gear

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John (OK)

08-20-2002 20:00:16

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Our WD-45 jumps out of third gear. The other gears work and hold just fine. We have the later gear shifter as shown in the repair manual (curved) Any ideas on where to look first? I was thinking of pulling the top of the tranny cover and shift linkage and starting there. All input is appreciated.

John in OK

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08-22-2002 13:10:00

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 Re: WD-45 Jumps out of 3rd gear in reply to John (OK), 08-20-2002 20:00:16  
I don't think it's bad forks as much as it is the tollerance between the cover rail and fork.
We have fixed a lot of tractors by welding part of the detent groove in the rail and then with a carbide bit in a die grinder grind the opposite side of the groove so that the fork will move farther. You can use molding clay between the shift collar and the gear, put the cover back on andshift into gear to find out how much more you can make it move.

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08-21-2002 09:06:02

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 Re: WD-45 Jumps out of 3rd gear in reply to John (OK), 08-20-2002 20:00:16  
At reassembly, it may help to shift the tranny into reverse, as well as the shifting tower. Easier to put back together, to get the reverse fork in proper position.

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08-21-2002 07:25:48

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 Re: WD-45 Jumps out of 3rd gear in reply to John (OK), 08-20-2002 20:00:16  
John, I maintain that this was a manufacturing tolerance problem that Allis had - the detent for the gear is not positioned properlly so it refuses to stay in gear after the edges are worn some on the slider. I have fixed the problem on a CA by getting a set of forks from a different CA that didn't have the problem. When I took my transmission apart, I found the wear on the good gear sliders and the bad gear slider to be about the same. My new forks pushed the slider 0.070 inches further in gear. In addition to new forks, I believe you could make a new detent shaft for your existing forks if you have access to a good milling machine with a ball end mill. This all assumes that the gears are still in fair condition. My experience is that it isn't worn gears but bad forks.

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08-21-2002 00:38:20

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 Re: WD-45 Jumps out of 3rd gear in reply to John (OK), 08-20-2002 20:00:16  
John Sounds like you are on the right track, sometimes the springs break that hold the ball in place on the shifting rods, could be that simple
watch close how you take it apart. hope this helps


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