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| No kickdown OR late shifts: can only pick one! https://slantsix.org/forum/viewtopic.php?t=37420 |
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| Author: | SlantSixDan [ Wed Oct 07, 2009 9:15 am ] |
| Post subject: | No kickdown OR late shifts: can only pick one! |
'64 Dart with 273-2bbl/auto is presenting me with an interesting shift problem. When I got the car, the 1-2 and 2-3 shifts were way too late. Couldn't get the car to go into 3rd below about 40 mph no matter what I did (lift off the throttle, etc). The rod-type kickdown adjustment works backwards compared to the slant-6 kickdown: you unsnap the ball joint from the pivot mounted on the firewall and unscrew it, lengthening the upper rod, to reduce kickdown pressure — it's because this upper rod is a pullrod, not a pushrod as in the six-cylinder setup. Once I figured that out, I was able to get the 1-2 and 2-3 shifts almost perfectly timed, but now I have no full-throttle kickdown at all. This makes me think the kickdown lever on the trans itself is incorrect (probably too long), because I can only have one part of its motion range: either I can have the rear half of its range (so I have kickdown but upshifts are too late) or I can have the front half of its range (so upshifts are correct but no kickdown). Can anyone think of another potential cause? |
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| Author: | Joshie225 [ Wed Oct 07, 2009 3:36 pm ] |
| Post subject: | |
I was going to say it sounds like the throttle pressure lever on the trans is too long. Then I read that you already suspected the lever is wrong so I guess this is a second vote. |
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| Author: | THOR [ Wed Oct 07, 2009 6:56 pm ] |
| Post subject: | |
From personal experience dealing with backyard rigged vehicles, I also vote that the arm is too long. Had a few vehicles do the same thing, only difference was the linkage on the carb was incorrectly proportioned. ~THOR~ |
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| Author: | bigslant6fan [ Wed Oct 07, 2009 8:35 pm ] |
| Post subject: | |
There is at least 3 different 904 KD levers that I know of,two different lenths and two different clockings of the "D" hole.most of the ones for the 3 piece bellcrank setups were shorter,also pre 70-ish ones had the diferent clocking. |
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