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Brian Jasper co. Ia 
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Joined: 11 Sep 2009
Location: Prairie City Ia
Points: 10508
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 Topic: Gear Jumping
Posted: 16 Jun 2017 at 1:09pm |
I saw an ad for a decent looking D14 that ran good, but jumped out of 3rd. My question is what is actually happening that causes this. Is it a bearing or something that gets worn and causes the main shaft or gear stack to thrust back and forth popping them out of gear? An automotive trans if they jump out it usually is a detent issue in the shift rails. I was looking at the parts breakdown of an early D17 and it looks very simple compared to an NV4500.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Charlie175
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Joined: 11 Sep 2009
Location: Shenandoah, VA
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Posted: 16 Jun 2017 at 1:13pm |
The Dog ears on the gears get worn and won't hold the gears together
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Charlie
'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8761
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Posted: 16 Jun 2017 at 1:29pm |
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Loose brgs,too much play in gear stack(snap rings or shim washers)shift rail detent needing moved for a little deeper engagement.Lots of contributors beyond gear grinding which does what Charlie shows. See if the shift lever can be pushed deeper in gear in 3rd beyond detent.If so you may make it useable by by welding/grinding a new deeper detent notch.Beyond that,it's a lot of work/$.
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Play Farmer
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Posted: 16 Jun 2017 at 5:14pm |
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And naturally 3rd gear is the one that gets used the most. I rarely use any other gear.
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DougG
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Location: Mo
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Posted: 16 Jun 2017 at 6:48pm |
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The funny part of this problem all it takes to keep it in gear is holding your hand against it with a little force and it stays right in
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B26240
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Posted: 16 Jun 2017 at 6:48pm |
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Brian, If it was me looking at buying I would figure $1000 per gear that it jumps out of, you being a good mechanic you may get by cheeper but cost can add up fast if you fix it right.
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DSeries4
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Joined: 12 Sep 2009
Location: Ontario, Canada
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Posted: 16 Jun 2017 at 9:02pm |
 DougG wrote:
The funny part of this problem all it takes to keep it in gear is holding your hand against it with a little force and it stays right in |
But that will wear out the shift fork. Then it's just another part to replace while you have the tranny apart to do a proper fix.
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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
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SteveM C/IL
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Posted: 17 Jun 2017 at 9:31am |
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LOL! Brian has rebuilt a Buda diesel....he's no stranger to spending money and hard work!!
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wfmurray
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Location: Bostic NC
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Posted: 17 Jun 2017 at 12:05pm |
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See this mentioned a lot and I also have a D 14 . Dad never let gears grind. I wondered if any one has ever welded up those dogs .I used to weld some and know you can weld to pretty close the same hardness as the shifter dogs. Retired and have a lot of time to think and some may be a bit foolish.
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CTuckerNWIL
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Location: NW Illinois
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Posted: 17 Jun 2017 at 3:15pm |
wfmurray wrote:
See this mentioned a lot and I also have a D 14 . Dad never let gears grind. I wondered if any one has ever welded up those dogs .I used to weld some and know you can weld to pretty close the same hardness as the shifter dogs. Retired and have a lot of time to think and some may be a bit foolish. |
I used to do a lot of tig welding to repair cutting surfaces in pierce dies. It takes a controlled pre-heat and post heat and the proper rod to maintain hardness without becoming brittle. That being said, when I got my 45 and found out it jumped out of 3 rd, I bought a new gear and shifting collar. There is a lot of labor involved to have to go back and do it over, so I did it right the first time.
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Brian Jasper co. Ia
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Location: Prairie City Ia
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Posted: 17 Jun 2017 at 8:55pm |
SteveM C/IL wrote:
LOL! Brian has rebuilt a Buda diesel....he's no stranger to spending money and hard work!! |
Don't forget countless 6.0/6.4 Powerstrokes and a few Duramax too. Thanks for the explanation guys. The next bit of work is the Power Director. I've been accumulating parts over about 3 years for this problem. While I'm at it I'll have a look at the bearings in the trans too.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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SteveM C/IL
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Location: Shelbyville IL
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Posted: 18 Jun 2017 at 12:10am |
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yeah...but at work your spending someone elses money....
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Clay
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Location: Udall, Kansas
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Posted: 18 Jun 2017 at 9:56am |
Great care must be taken if using any sort of electric welding device. NEVER weld through a bearing!!!!! ALWAYS disconnect the charging system before welding.
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