I'm looking for an idea on where to put the ****on or lever. A dump truck 2- speed would work, maybe weld a tube along my floor shifter to hide the cable and dress it up. Pictures would be appreciated.
The Woodward roadster has a manually shifted columbia. I dont kmow all the details but I think it was made using mech brake linkage parts.
Vacuum truck 2 speed controls were around before electric, the later shift lever mounted controls look similar. You will need 2 tubes at the switch.
Not knowing much about Columbia's, I thought they were all vacuum ***isted. The SCoT blower I'm running doesn't have the capabilities for a vacuum connection. An electric solenoid may be another option. This would certainly be a simplified, cleaner look.
Well,,,before vacuum shift in trucks, 2 speed was a separate shift lever in the floor with linkage to the rear Another way would be a l o n g push/pull cable like OD.
Just a silly question, but what kind of gear do you get in a dump truck rear? 4.11 in the high, and a stumb puller in low? And is the 2speed Columbia anything like the dry lake style/QC rear most people see? Or is like any other 2speed truck rear? Putting it in what? To what purpose? I always liked the truck styled lokation on the shifter, with in a thumbs reach.
A dump truck is usually a reduction, maybe about 25% or less...designed to give a little extra to the trans 1st gear when starting out and then can be used to "split" gears for hauling to heavy loads ...While an Over Drive gives you no extra pulling power in 1st gear as it puts the overall ratio between 1st and 2nd gear it still can be used to "split" gears if desired, gives a little more flexability to a 3spd trans and then of course give a lower overal gear ratio for hopfully improved economy...
Some guys use late model truck dual gas tank fuel line selector valves to pipe the vacuum to shift the rear vacuum canister back and forth. Get out a piece of paper and figure it out.
Maybe I didn't make myself clear. It's not a dump truck 2-speed it would be a p***enger car one. I was only referencing the shift ****on for a possible way to shift without all the vacuum parts and pieces. As far as to what it's going into, it's a 32. I have a Halibrand 201 , but didn't want to cut the original floor for the A-frame rear cross member. This is some kind of mental brain disorder I have left over from my matching numbers days, but I'm getting better. So I thought the columbia would be a comparable solution to get a little more drivability .
So what you are saying is excatly the same is I tryid to say. Dump truck rear is only good when having a small motor pulling big loads. But does not do anything for your top speed! But makes your, 100ish horsepower, 3 speed box and two speed rear, makes it possible to move 2 ton Dirt from point A to point B. Regartless of Hills. EDIT, sorry I dident get you right. But now I see. The 2speed Columbia gives Quick Change and OD, but all with in the rear?
The fuel valve for a vac. shift should work ok, but a small line. An early dashboard type of truck 2 speed switch was a similar type of 1/4 turn rotary switch, usually with a 3/8 hose line. As for a truck 2 speed, hell, yes you go faster for a given RPM. My '57 F600 with a 292 has a 2speed ratio of 6.33/8.81 with 8.25-20 tires, 39" dia. With a .78 OD 5th gear I have an overall ratio of 5.o somthin', I can run about 65 at 2700.
I'm currently running a Columbia 2 speed rear in my 40. It is vac*** shifted and works great. There are vac*** switches on ebay all the time or you can get them from the guy in California if you want to go that route instead of the cable.
Check "Columbia Two Speed " web site they offer modern replacement for the old electrical vacuum valves. The Columbia is not supposed to be shifted under load (clutch has to be depressed) With that said, I saw this picture and copied it. It looks home made.
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