Oliver HG and OC3 crawler aux trans info

JDEM

Well-known Member
I was asked to post info on an aux-trans setup I built and installed. I did several, all the same. All around 30 years ago before I had a digital camera. So photos not great. The crawler I did for my self I am still using as a trail-machine in the Michigan UP. 30 years and it's worked flawlessly (as far as the trans goes). Hard to imagine using it without the aux trans. I was involved with several people also trying to do it with various differences. For me, I wanted a stock Ford Model A trans to work with no mods to it. The original optional aux that Oliver offered, made by Trasco, modified the Ford Model A trans with a special input shaft and retained the original Oliver clutch-disk. I did not. Mine uses a stock Ford Model A trans and a repro Ford Model A disk that is cheap and the same diameter as the Oliver-Cletrac disk. I did add sealed input and output bearings since the original Ford design has no oil-sealing. Here are some photos ands specs. Also a few photos of the original setup from Oliver.
 

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  • A trans installed 1bb.jpg
    A trans installed 1bb.jpg
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  • Actuatiing arm.jpg
    Actuatiing arm.jpg
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  • Assembled Model A trans. unit.jpg
    Assembled Model A trans. unit.jpg
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  • Back mod hous 3.jpg
    Back mod hous 3.jpg
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  • Installed pressureplate and imput shaft.jpg
    Installed pressureplate and imput shaft.jpg
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  • disks and pressure plate.jpg
    disks and pressure plate.jpg
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  • Back mod housing 4bb.jpg
    Back mod housing 4bb.jpg
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  • Installed trans 1 bcolor.jpg
    Installed trans 1 bcolor.jpg
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  • Mod A Trans 1.jpg
    Mod A Trans 1.jpg
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  • mod_couplerb.jpg
    mod_couplerb.jpg
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I was asked to post info on an aux-trans setup I built and installed. I did several, all the same. All around 30 years ago before I had a digital camera. So photos not great. The crawler I did for my self I am still using as a trail-machine in the Michigan UP. 30 years and it's worked flawlessly (as far as the trans goes). Hard to imagine using it without the aux trans. I was involved with several people also trying to do it with various differences. For me, I wanted a stock Ford Model A trans to work with no mods to it. The original optional aux that Oliver offered, made by Trasco, modified the Ford Model A trans with a special input shaft and retained the original Oliver clutch-disk. I did not. Mine uses a stock Ford Model A trans and a repro Ford Model A disk that is cheap and the same diameter as the Oliver-Cletrac disk. I did add sealed input and output bearings since the original Ford design has no oil-sealing. Here are some photos ands specs. Also a few photos of the original setup from Oliver.
I could only post 10 photos so not all posted. Like this.
 

Attachments

  • Side modified with specs.jpg
    Side modified with specs.jpg
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