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trans kickdown linkage setup?

Posted By: limechallenger

trans kickdown linkage setup? - 07/02/10 03:19 PM

I've got a 78 Aspen R/T that I put a 360 with a 727 trans in it ,my question is how to setup the linkage at the carb end? At what point in the travel of the throttle should the kickdown move? I've got a holley 750 double pump with manual secondaries and the k-d linkage from a 727. any good advice on how to set it up? I know I need to have it operational before I drive it too far! Thanks
Posted By: stumpy

Re: trans kickdown linkage setup? - 07/02/10 03:58 PM

You want the trans lever almost full back at full throttle. Then adjust form there until you are happy with the shift points.
Posted By: ProStDodge

Re: trans kickdown linkage setup? - 07/02/10 04:11 PM

I would highly recommend you lose the metal rod linkage and install a Lokar kick down cable. eliminates the bind in the throttle (the one most think is the "four BBL kicking in").

They install easily and work much smoother than the stock linkage.
Posted By: MoparforLife

Re: trans kickdown linkage setup? - 07/02/10 04:14 PM

To answer your quest ion further - you want the rear of the slot on the KD linkage in constant contact with the throttle pin and have it start to move rearward when the throttle starts to open and move continually through out throttle movement. This is what controls the internal throttle pressures in the transmission and controls the shift points.. The KD linkage should be held forward to the throttle pin by a small spring. (Number 13) To progress to have approx. 1/8 inch more travel (+/-) to fully back when the throttle if wide open.

Posted By: John_Kunkel

Re: trans kickdown linkage setup? - 07/02/10 08:15 PM


In addition to the above info that Holley carb needs a Mopar throttle lever extension (Holley #20-7) to make the linkage work correctly.
Posted By: MoparforLife

Re: trans kickdown linkage setup? - 07/02/10 09:31 PM

Quote:


In addition to the above info that Holley carb needs a Mopar throttle lever extension (Holley #20-7) to make the linkage work correctly.


Posted By: 1969Coronet

Re: trans kickdown linkage setup? - 08/29/10 05:53 PM

Hello all, i was driving around the other day and my 69 coronet 318 904 stopped shifting properly. It shifts the first but won't come out of 2nd. I was looking at it and the linkage came apart.

I put it back on see blue arrow and still did not work so I been experimenting with the adjustment rod green arrow and it still won't shift. Any recommendations?


Posted By: MoparforLife

Re: trans kickdown linkage setup? - 08/29/10 05:59 PM

The green is your throttle cable. Start messing with that and all you are doing is altering the throttle opening. Slide it ahead in the bracket and it very likely will not pull the throttle open all the way when the foot feed is held to the floor. Slide it too far back and it can hold the throttle plates from going closed at idle.
Posted By: 62maxwgn

Re: trans kickdown linkage setup? - 08/29/10 06:01 PM

Quote:



They install easily and work much smoother than the stock linkage.




Not if the factory linkage is complete, correct and adjusted properly.Also,Lokar can't hold a candle to the Bouchillon kit.
Posted By: JohnRR

Re: trans kickdown linkage setup? - 08/29/10 06:08 PM

Quote:

Hello all, i was driving around the other day and my 69 coronet 318 904 stopped shifting properly. It shifts the first but won't come out of 2nd. I was looking at it and the linkage came apart.

I put it back on see blue arrow and still did not work so I been experimenting with the adjustment rod green arrow and it still won't shift. Any recommendations?







First off that red spring is supposed to be in hole at the end of the rod at your blue arrow point , it's not doing it's job where you have it .
Posted By: Kowal

Re: trans kickdown linkage setup? - 08/29/10 06:23 PM

Quote:

Hello all, i was driving around the other day and my 69 coronet 318 904 stopped shifting properly. It shifts the first but won't come out of 2nd. I was looking at it and the linkage came apart.

I put it back on see blue arrow and still did not work so I been experimenting with the adjustment rod green arrow and it still won't shift. Any recommendations?





To my eye...you have a lot going on here all, working against you. I can't quite tell from the picture, but you should have a washer and clip holding the kickdown slotted lever in place so it doesn't slide to the side on the and hang up, looks like you have it. Also, your kickdown spring should be running parallel with the lever in order to get the right geometry, meaning hooked on top of the bell crank by the firewall.

To adjust...get under the car and hold the kickdown lever all the way forward at the transmission (a small bungy cord or a bent wire tied off somewhere is good for this). With the lever all the way forward at the trans, get your head back under the hood and adjust the vertical threaded rod so the bell crank lines up correctly with the bracket (on top, rear of the motor, by the firewall). If you have the right brackets, you should be able to stick a drill bit through the small hole in the bracket and the two small holes in the bell crank. There should be no pressure on the vertical piece, just nicely lined up. If you have a mismatched bracket to bell crank so there holes aren't even close, just eyeball what would look like a neutral adjustment. Let loose your kickdown lever underneath at the trans. Now adjust the slider arm (the one with the long slot) so it doesn't stop you from going to full open throttle and more importantly, so it just touches the back of the slot on the throttle pin with the car idling as normal. In other words, with the slotted rod all the way forward the inside back of the slot just touches the throttle lever pin. Then hook up your kickdown spring and return spring. If your car is shifting too early, lengthen the slotted rod a turn or two, do not mess with the threaded rod anymore. Should work!
Posted By: 62maxwgn

Re: trans kickdown linkage setup? - 08/29/10 07:15 PM

Regardlessof what you have,the spring must be connected so that the throttle pressure adjustmet rod is be pulled forward against the throttle shaft pin .

Attached picture 6165311-66342.jpg
Posted By: 1969Coronet

Re: trans kickdown linkage setup? - 08/29/10 08:46 PM

I moved the spring from to where the yellow arrow and now the adjustment rod now rests against the shaft pin (purple dot). It's been in the wrong spot for quite awhile. That makes sense but did not fix it.



The car was running and shifting pretty good and shifting until suddenly. Dont know how the retaining pin came out but maybe the bottom end of the linkage got knocked out of adjustment as well

I'll do the adjustment KOWAL mentioned next.

thanks.
Posted By: 67PLY

Re: trans kickdown linkage setup? - 08/30/10 02:12 AM

I have the same stock setup on my 67 belvy 318 engine - it works good. i'll take a pic - and post it.
Posted By: 1969Coronet

Re: trans kickdown linkage setup? - 08/30/10 01:58 PM

Quote:

I have the same stock setup on my 67 belvy 318 engine - it works good. i'll take a pic - and post it.




that would be great!

thanks everyone for the suggestions.
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