New Acquisition: Rocky Mountain Transmission

[Tom Dove Jr]

Found this recently and picked up Sunday. I’ll be needing to open it up in a bit to check condition.

Tom
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[Dan McEachern]

I made up some new counter shafts for these a few years ago and still have a few if it turns out you need one.

[ClaytonPaddison]

Found this recently and picked up Sunday. I’ll be needing to open it up in a bit to check condition.

Tom
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Those are neat gearboxes. That looks like it may be the TT 1-ton version. I think those were available as a "6-Speed" (under, direct and Overdrive) and a 2-spd (under and Direct or Direct and Overdrive). Should be marked on the case what it is.

If it is a TT version, might be a challenge to get it in a car chassis.

[TWrenn]

Hard to read the nomenclature but it does look like a "beat up" number 6 in front of "speed transmission"

[Tom Dove Jr]

TWren, you are correct. Close examination shows a 6 speed. Also appears the S/N has been shaved off. Might just be under the paint.

Clayton, my thoughts as well. The unit was reputed to be rebuilt some years ago prior to the TT's owner passing away. The TT itself found a new home and this was discovered just a few weeks ago and was to have been installed at some point. I likely will sell in hopes of getting a more appropriate unit.

Dan, you may be called into service for those shafts.

Tom
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[ClaytonPaddison]

TWren, you are correct. Close examination shows a 6 speed. Also appears the S/N has been shaved off. Might just be under the paint.

Clayton, my thoughts as well. The unit was reputed to be rebuilt some years ago prior to the TT's owner passing away. The TT itself found a new home and this was discovered just a few weeks ago and was to have been installed at some point. I likely will sell in hopes of getting a more appropriate unit.

Dan, you may be called into service for those shafts.

Tom
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Its very similar to my Universal.



They were bought up and the name changed under the Rocky-Mountain banner. Mine is a 2spd underdrive version...so "Slow and Slower" I'ts going to go away I think in favor of an Iron Warford and a set of high-speed gears for the axle.

[Dennis Prince]

I am working on a Rocky Mountain 6 speed trans and after looking at the pictures here, I am wondering what I have. The pictures on this thread show a different design and have made in Seattle Washington on it, the one I have says it was made in Los Angeles California on it and I am including pictures. Any info would be greatly appreciated. Thanks, Dennis

[Wayne Sheldon]

Dennis P, Your transmission looks like a car unit. They can be a bit confusing looking at photos knowing whether they are a three speed U-D-O unit or a two speed direct and one other gear unit.
Most of the ones I had with the three speed (3X2=6) had a bulge for the additional gearing that I do not see on yours. However, I have been told I was wrong about that before? The couple I had that looked like yours were two speed units. But again, I have been wrong before.

[Norman Kling]

There are mountains around both Los Angeles and Seattle, but the "Rocky Mountains" are in Colorado, Wyoming and Montana and on into Canada. Wonder why they didn't name it San Gabriel Mountains or Cascades?
Norm

[Dennis Prince]

Thanks guys for the responses, it looks like you have to pull the output/pinion shaft out if the trans to be able to set up the pinion to ring gear depth and backlash, has anyone set up one of these that can tell me how it is done? Thanks, Dennis

[Dan McEachern]

Yes you can remove the output shaft, mount the pinion and set up the ring/pinion mesh. The shaft will come out from the output end. Here is what they look like removed from the transmission:

[Dennis Prince]

Thanks Dan, That is what I was looking for.