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Old 01-04-2004, 07:53 PM
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Dodge 727

How do you adjust the throttle valve linkage. I have mixed and matched brackets on the intake. I started with a 2 barrel linkage and put a 4 barrel carb on. I had to mix and match 4 barrel linkage parts. The linkage is within adjusting range, but how do I adjust it?

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Old 01-05-2004, 06:49 PM
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You did not post what you are working on, but I will take a stab in the dark. On some vehicles, Chry used a "sliding adjuster" that was spring loaded. They had a bolt in a square block that slid on the round throttle linkage at the bottom. To adjust them, you take, I believe a 1/2" wrench and loosen the bolt enough to let the block slide. They were supposed to self adjust that way. The spring was supposed to give just enough pressure to take up the slack, without forcing the valve in.

That should get you in the ball park. You can make slight adjustments from there.

HTH
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Old 01-05-2004, 08:14 PM
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It is a '73 Challenger with a 318. There is no spring on the tranny linkage. I have a Holley carb. The carb has the Dodge adapter with the stud that goes into the linkage. The linkage is the one with the long slotted arm. It looks like it just has a bolt to adjust the throw.
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Old 01-06-2004, 03:04 PM
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Quote:
Originally posted by lluciano77
It is a '73 Challenger with a 318. There is no spring on the tranny linkage
There should be a spring on the tranny/kickdown linkage, if a friend of mine is still in town I'll see if I can scan a pic of how it should be set up out of his factory service manual.

As far as adjustment, adjust it so that the lever on the tranny is at the limit of its travel at WOT.
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Old 01-06-2004, 03:10 PM
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I usually adjust the throttle first, so that I get full pedal, then I adjust the kickdown linkage to wide open kickdown = wide open throttle.
The spring is to return the kickdown under light loads? There is a long slot on the upper kickdown linkage, the spring pulls the kickdown linkage forward for light throttle- if the kickdown is too far back the mainline pressure will be high and the shift will be late and hard.
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Old 01-06-2004, 11:45 PM
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Thanks guys!

That is what I did. I went for full travel, with the kickdown all the way at the same time as WOT on the carb. I have a Frankenstein type linkage. It took me about 4 trips to the wrecking yard and a few different types of linkages to come up with one that worked on the 4 bbl. The throw looks right and they open all the way.

I can see why so many Mopar guys go manual trans. I can also see why there are less working modified Mopars with auto transmissions on the road. There must have been a lot of people burning up their trannies.
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Old 01-07-2004, 05:51 PM
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Most MoPar tranny failures I have seen have the kickdown linkage discarded. Nothing will kill a 727 faster.
High performance stuff usually have manual valve bodies, and they do away with the kickdown. It's just the automatic shifting valve bodies that need them.

I've beaten the hell out of street racing 727 autos for years and years, never had a tranny failure. Ever.

Is your linkage single piece, or three piece with the bellcranks?
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Old 01-07-2004, 08:58 PM
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There are no bell cranks. The linkage has a triangular shaped bracket that bolts to the intake. It has a c-shaped bar that pivots with a long slotted arm that attaches to the carb.
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