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1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup
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roblun
Posted 2018-01-18 7:22 AM (#556501)
Subject: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Location: Fremantle, Western Australia, Australia
Hi there, just need some info on what I need to setup the kickdown on my
1958 Plymouth Belvedere, I have a V8 318 with the original 2x4 Carter carbs setup
With the 3 speed torqueflte 727 transmission, can someone tell me what I need to get and
If possible have the original setup and also where to buy, any help would be much appreciated, thank you!

Roberto

Edited by roblun 2018-01-18 7:33 AM
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56D500boy
Posted 2018-01-18 10:02 AM (#556509 - in reply to #556501)
Subject: RE: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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This might not help. I could not find a diagram of the throttle linkage for a 58 LPS-2 Fury. These seemed as close as I could find. Hope that they help at least a little



Edited by 56D500boy 2018-01-18 10:04 AM




(ThrottleLinkageDiagram_P30.jpg)



(ThrottleLinkageDiagram_S24.jpg)



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Attachments ThrottleLinkageDiagram_P30.jpg (110KB - 348 downloads)
Attachments ThrottleLinkageDiagram_S24.jpg (87KB - 157 downloads)
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roblun
Posted 2018-01-18 10:16 AM (#556511 - in reply to #556501)
Subject: Re: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Location: Fremantle, Western Australia, Australia
Is there a place where I can buy this setup or is it hard to find... cheers
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57chizler
Posted 2018-01-18 1:11 PM (#556520 - in reply to #556501)
Subject: RE: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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What year engine/carb/trans are you using? The later linkage doesn't use the firewall bell crank but is totally mounted on the engine/trans. Easier to find and install/adjust. Here's a typical later installation.



(KD link 07 (Small).jpg)



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roblun
Posted 2018-01-19 7:03 AM (#556556 - in reply to #556501)
Subject: RE: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Location: Fremantle, Western Australia, Australia
I ended up getting this Lokar Chrysler 727 kickdown cable Hi-Tech.



(s-l1600.jpg)



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57chizler
Posted 2018-01-20 12:11 PM (#556613 - in reply to #556556)
Subject: RE: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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The problem with the Lokar is that it's generic even though advertised to fit a Mopar because of the different lengths of the transmission lever.

If the generic Lokar instructions are followed and the cable adjusted so that the trans lever is full back at carb WOT you can see (simple math) that the first 3/4" to 1 1/2" of the lever travel is already used up at idle and there's no spring to pull the lever forward.

It's not unusual to see these Lokar installations have light throttle 1-2 shifts at 25+ mph and 2-3 at 40+ mph or even higher and, possibly, no 2-3 upshift at all. If the cable is adjusted for correct light throttle shift points there is insufficient TP at WOT and no forced downshifts. Potential damage.

So, as I've repeatedly ranted, the Lokar works OK if the installer ignores the Lokar adjustment procedure and knows to match the total travel of the cable attach points and installs a spring.

You need to measure the full travel of the carb lever where the cable attaches and then measure the full travel of the transmission lever where the cable attaches; it usually won't be the same so you need to drill a new hole in the transmission lever so that the full travel of both levers is the same. Also, there should be a spring pulling the transmission lever forward.

It isn't necessary for the trans lever to be full back at WOT but be sure that WOT under the hood is the same as WOT at the pedal...misadjusted throttle linkage will prevent the carb from going wide open when the pedal is matted and that, in turn, will prevent the trans lever from going back enough to provide kickdown.

Remove the cable from the carb and measure how far the hole in the throttle lever moves from idle to WOT. Then measure how far the hole in the trans lever moves from full forward to full back. The movement of the trans lever will likely be more than the carb lever so find the spot on the trans lever that matches the travel of the carb lever and drill there.

It's unlikely that the trans lever will return to the full forward position without a spring assist.
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roblun
Posted 2018-01-21 11:02 PM (#556705 - in reply to #556501)
Subject: Re: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Location: Fremantle, Western Australia, Australia
Hi 57chizler, thanks for the added information, I will be sending this info to my mechanic when the cars goes back to the workshop next week to get a few
other things sorted out. Do you have any pictures or links to see the setup and the spring can that be purchased at summit or other similar places like that.

Cheers

Regards

Roberto
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57chizler
Posted 2018-01-22 4:44 PM (#556757 - in reply to #556705)
Subject: Re: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Hardware store spring will suffice, doesn't need to be real strong, just enough to pull the lever full forward.
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roblun
Posted 2018-01-23 1:42 AM (#556778 - in reply to #556501)
Subject: Re: 1958 Plymouth Belvedere 3 speed Torque 727 Kickdown Setup



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Location: Fremantle, Western Australia, Australia
Thanks 57chizler!
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