727 trans kickdown

[Armyvet25]

First, some history, when bought, all 3 gears no problem, kickdown broke(cable style like Lokar) replaced it, and for the life of me can't get more than 1st and second, yes reverse works so not clutches since 3rd and reverse use same.
It's a built trans with a street racer kit(not manual valve).
Question is setting up the kickdown, I've heard full throttle then pull cable with maybe a 1/4" gap at full throttle, but that keeps it in first forever, went the opposite extreme with a 1/4" at rest, this shifts from 1st to second fairly quick, the tighter I go the longer the shift till to extreme. ratio for the cable pull below and up top pretty close.
help setup please.
383/727

 

[roadrunnerh]

Which cable setup are you using now? I can say the actual Lokar kickdown setup has worked well for my 383/727 Scamp.

 

[Armyvet25]

off brand version of the Lokar, same thing it had on it when it was working

 

[Armyvet25]

is the lever for the kick down on the trans engaged at all prior to accelerating?

 

[roadrunnerh]

If you're asking if the lever on trans moves 1:1 with throttle, then no.

 

[Armyvet25]

If you're asking if the lever on trans moves 1:1 with throttle, then no.

no not that, the lever on the trans, is it engaged at all forward at rest, or completely relaxed- at idle, just trying to get an idea when it starts providing pressure

 

[roadrunnerh]

relaxed at idle.

 

[Armyvet25]

hmmmm, that's how mine is with about a 1/4" play before the throttle starts to pull it

 

[Armyvet25]

here's a weird added info, won't manual shift through 3 gears either, will going from first to second still in first, then to D goes to second, shifter linkage good

 

[roadrunnerh]

No expert here, just relaying how mine is setup. I followed the instructions with the kit last summer.

 

[GTXDAN]

With the throttle at idle and the lever on the trans forward against the stop there should be no slack in the cable.

 

[dvw]

Disconnect the cable all together. Drive it around normally, no hard accel. Does it shift into 3rd? If not it's not a throttle pressure cable issue. The lever will move easily until the cam on the throttle shaft starts to move the throttle pressure valve. If it's not the cable adjustment ? Then you need to check line pressure while moving the lever by hand (disconnected from the carb). PSI should be around 50with the lever forward, 90 with the lever all the way back. And also check governor pressure. Roughly 1 psi/mph.
Doug

 

[Geoff 2]

The Chrys KD arrangement was NOT one of their best designs. Too many variables.

 

[lemondana]

It works fine till someone that doesn't know what they are doing fucks with it. I use the factory mechanical linkage modified as needed. Mine always works. No cable **** for me!