Has anyone heard of a “Jumbo” brand two-speed rear end?
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Topic author - Posts: 512
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Has anyone heard of a “Jumbo” brand two-speed rear end?
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Hello fellow Model T-ers,
Have any of you heard of a “Jumbo” brand two-speed rear end? Here is a photograph, the best I could find, of one on a 1910 model T Ford. I would be interested in whether they work similar to a Ruckstell, whether or not they are problematic, and any other information about them.
Thank you in advance for guidance you might give me on this question.
Hello fellow Model T-ers,
Have any of you heard of a “Jumbo” brand two-speed rear end? Here is a photograph, the best I could find, of one on a 1910 model T Ford. I would be interested in whether they work similar to a Ruckstell, whether or not they are problematic, and any other information about them.
Thank you in advance for guidance you might give me on this question.
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
need a better picture- looks like it may be a driveline trans of some sort, but...…………….
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
Jumbo Planator: http://www.mtfca.com/discus/messages/33 ... 1370871637
Scott Conger
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
Tyranny under the guise of law is still Tyranny
NH Full Flow Float Valves
Obsolete carburetor parts manufactured
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
Just a quick clarification. The photo offered may be of a "1910" car, maybe a wannabe 1910? But the rear end appears to be later 1910s. The Planator underdrives (either Starr or Jumbo) are a 1920s era accessory.
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
It might work fine, but since it has a modification of the driveshaft and driveshaft tube, and is not as common as the Ruckstell, I would recommend the owner keep a stock rear end complete with the driveshaft just in case the Planator breaks down, they can still use the car with a simple transfer of the rear axle assembly.
Norm
Norm
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
Planators, I think that's what you have there, can get into a neutral condition. You will want outside auxiliary brakes if you run one. I think they have a 50% reduction.
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
I had one in a 1915 that was on a Southern Wide Track chassis. I figured (guessed) it was originally used on real muddy roads, or some other low speed function. So, for me, it was pretty much useless for traveling on paved roads as all I needed was the High and Low pedal. Just extra weight for not much practical purpose.
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
The 50% reduction is the same as a Ruckstell. I believe the advantage is low gearing in high for climbing and descending grades without having to resort to the tiresome low pedal. Not very important in the relatively flat middle of the country, but quite desirable in places like Pennsylvania and the western states, both of which have long, steep grades.
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
The Jumbo planatar can’t get into neutral unless there is something seriously broken. They fixed flaws from the earlier Starr Planatar design to take care of that. If either one’s inside condition is unknown, it is always smart to have another source of brakes.
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Re: Has anyone heard of a “Jumbo” brand two-speed rear end?
The Planator, along with Moore and the Universal (brand name!) are desirable in the brass era crowd because they can be used on an early 'clamshell' rear end which the Ruckstell cannot be used on. They cannot be used on the earliest clamshell rear ends used in the first year of manufacturing due to the Babbitt pinion bearing and special torque tube. They give most of the useful advantages of a Ruckstell without having to giv up the desirable early rear axle.
The Ruckstell axle can be used on the 1913'/14 (which actually came out late in the 1912) rear end and everything later.
The Ruckstell axle can be used on the 1913'/14 (which actually came out late in the 1912) rear end and everything later.