| chucksue | -- 05-19-2017 @ 5:46 AM |
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I need help on my Columbia rear end. Doesn't shift all the time. When it does it doesn't want to stay in. What size tube should you use from the carb back to the rear canister? I rebuilt this when Dan Creable had parts in Temecula Ca. IT has the thin plate under the carb for the vac.The line there is 1/4 inch???
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| kubes40 | -- 05-19-2017 @ 11:45 AM |
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It would help to know the type of controls you are utilizing (year). The vacuum line is 3/8" inside diameter. That is ALL the lines, both rubber and copper plated steel.
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| 4dFordSC | -- 05-19-2017 @ 2:16 PM |
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Try shooting some Marvel Mystery Oil into the shift cannister.
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| wmsteed | -- 05-20-2017 @ 7:21 AM |
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The original vacuum lines were 3/8" steel running the length of the chassis, with short rubber hoses at the engine and rear end. I don't think the 1/4" lines will provide enough volume, I would also suspect the vacuum plate under the carb. My car picks up the vacuum from a port in the manifold below the carb.. ie; intended for the wipers.. Check the vacuum can on the Columbia, leathers might be dry or the can could be gunked up from age. Bill 36 5 win delx cpe
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| chucksue | -- 05-23-2017 @ 12:44 PM |
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The controls are the vacc. manual mounted on the dash.
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| chucksue | -- 05-23-2017 @ 12:46 PM |
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You are probably right about the leathers. I heard there was someone down south that had replacement parts for Columbias. I will have to do some research.
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| kubes40 | -- 05-23-2017 @ 2:39 PM |
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Vacuum manual mounted on the dash? Huh? I've never seen the controls mounted on the dash. Could you post a photo? That would help a lot in determining what is most likely the issue. Otherwise it's just guessing... Mike "Kube" Kubarth
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| coup | -- 05-23-2017 @ 4:26 PM |
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I'll guess with you. If it actually shifts, the over center spring will hold it there. It would need vacuum to shift it back. Bypass the control and see if it will stay.
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| wmsteed | -- 05-24-2017 @ 8:49 AM |
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I think that I'll stay with my original statement that the 1/4" lines are two small, not enough volume and that the leathers in the vacuum can are dried out... Bill 36 5 win delx cpe
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| kubes40 | -- 05-24-2017 @ 9:27 AM |
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I HAVE TO SAY, WITHOUT KNOWING MORE FROM THE ORIGINAL POSTER IN REGARD TO EXACTLY WHAT CONTROLS HE HAS, ETC. ALL A GUY CAN DO IS GUESS. IN MY OPINION, IF HE TRULY WANTS CONSTRUCTIVE HELP, HE NEEDS TO GET BACK TO US WITH MORE PRECISE INFORMATION. OTHERWISE, I SUPPOSE HE IS WILLING TO CHASE FROM ONE THING (GUESS) TO ANOTHER. ME? I PREFER TO DIAGNOSE PROBLEMS SYSTEMATICALLY. Mike "Kube" Kubarth
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| Grant | -- 05-25-2017 @ 5:14 AM |
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Photo of vacuum control for Columbia rear end in our '36, mounted on dash below the choke knob.........
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| chucksue | -- 05-25-2017 @ 6:46 AM |
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they are actually under the dash.
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| chucksue | -- 05-25-2017 @ 6:49 AM |
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Just bear with me I don't have internet at home.
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| chucksue | -- 05-29-2017 @ 8:37 AM |
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Here are the pictures of my controls.
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| chucksue | -- 05-29-2017 @ 8:39 AM |
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When the canister shifts where does the air in the opposite side of the leathers go?
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| kubes40 | -- 05-29-2017 @ 10:14 AM |
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I'd like a photo of the actually controls beneath the hood. The actuating cable really doesn't matter at this point. Mike "Kube" Kubarth
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| 4dFordSC | -- 05-29-2017 @ 12:33 PM |
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<<When the canister shifts where does the air in the opposite side of the leathers go?>> It pushes the piston toward the vacuum.
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| 40 Coupe | -- 05-30-2017 @ 4:09 AM |
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It appears you have the correct switch handle for the Columbia. The switch handle operates a valve mounted through the firewall under the hood. It also operates the speedometer changer under the dash. The second valve for shifting should be mounted on the transmission bell housing with linkage to the clutch pedal. To shift, while driving, depress the clutch pedal to the floor then move the dash control, then release the clutch pedal. The vent has to be on the firewall valve but I am not exactly sure where the vent hole,is located on the valve. This is a good question for John Connelly at "Columbia Two Speed" his Co. is now in Cottonwood, AZ with the same phone number. Shift problems can be related to the transmission clutch adjustment and the adjustment of the clutch operated vacuum valve. There is a procedure in the 35-36 installation booklet for checking the adjustments. This message was edited by 40 Coupe on 5-30-17 @ 4:48 AM
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| chucksue | -- 06-08-2017 @ 12:44 PM |
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I appreciate the help. I will try to get pictures of the control on the firewall.
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| 40 Coupe | -- 06-08-2017 @ 6:38 PM |
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The firewall valve looks like the below.
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| 40 Coupe | -- 06-08-2017 @ 6:39 PM |
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The controls look like the items below for 35-36 I believe the hole in the firewall mounted valve is the vent for the side without vacuum. This message was edited by 40 Coupe on 6-8-17 @ 6:42 PM
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| chucksue | -- 07-02-2017 @ 8:40 AM |
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here is my valve. I tried a second valve to vent the canister bu it did not work. I will have to remove it
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