70newport

My 727 in my newport has started an issue where it will shift out of first at a reasonable speed/rpm but then will not shift out of 2nd into 3rd untill I am doing atleast 55 MPH and am not even touching the throttle. I tried looking at the kickdown linkage and cant make sense of this seeing as if I make any adjustments it shifts from 1st to 2nd earlier but keeps the same shift point going from 2nd to 3rd. I did change the carb when this started but it is not making sense to me......HELP!!!!

Thanks,

Gary

TVLynn

What kind of carb did you use ? DID you add the Mopar throttle adapter ?

70newport

holley street avenger and yes i did use the adapter. I dont think it is related but wanted to give all the factors

moe7404

"holley street avenger?" really? ill try to be nice. sounds like the linkage is not set right. best thing is to find an unmolested one and copy it. i have never seen a setup the way chrysler did, that did not work. NOTE: the slotted link that goes over the pin should be pulled forward making the slot in front of the pin. the reason for the slot is if snow collects on the bottom linkage and holds the link back the carb can still close.

RacerHog

Now that's one I have not heard.....

70newport

I used the linkage the same way on my old holley carb and it worked perfect. Adjusting the linkage only changes the shift out of first into second currently.

Coronet 500

I will assume you know the proper procedure for adjusting it. My only suggestions would be are secondaries "unlocked" when pushing linkage to full throttle when adjusting or is the radius of then "pin" same as the other carb that worked. I have had a holley linkage with the proper Mopar pin only to find it closer to the throttle shaft slowing the rate that it would push the throttle pressure rod. Measured and drilled hole as close to OEM and cured the problem.

RacerHog

Trans linkage adjustment is at around 7:00 Min....... Hope this helps you...

70newport

I'm going to follow this video and go through everything in the next 48 hours. I'll report back ASAP! Thanks everyone!

RacerHog

Good Luck.... Keep us Posted....

moe7404

i have all ways had the engine running, ran the gear shift through all the gears then stop in neutral to check the level. as my 1967 coronet manual says. and my other manuals say. if you dont your clutches, servos, may not be full.

Gorts 5th

Im curius about this tell some more details

70newport

Went through everything and still can't figure this out. Is anyone thinking the tranny is just shot? I'm not sure where else to go with this......

Gorts 5th

Have you tryed adjusting the linkage at the tranny side ?
there should be a block on the end , attached to the pressuer or kick down arm off the trany ,,with the rod attached through a slot with a lock bolt to hold it
you can loosen the bolt and slide the linkage back or foward . I set mine where I feel the lever start to resist .

demetri

If first and second gear shift normally, the linkage between the throttle and transmission must be OK. May be something wrong in the valve body. If the shifts are firm, may be no need to remove the transmission from the car. May be need to take it to a transmission specialist ... some old guy that knows old torquflites.

TVLynn

Since the adjustment didn't help You may have a worn out clutch pack. Had a 904 that would not shift to hi gear unless you took your foot off the gas pedal. Time for a rebuild !

Gorts 5th

You may need a rebuild... Just a coincidence it failed with the new carb
was the vehicle sitting or was it a driver..daily ..weekly?

Rooty

The swing lever at the transmission is not a kick down lever as some think, but rather a pressure control valve. At idle this lever is completely at it's end stop in the forward position. At full throttle it is at it's end stop all the way back. Engine doesn't have to be running to verify this. The bellcrank system installed on vintage Mopars is just crap and looks as such. New technologies have replaced this system of rods
and levers with cables and no one does it better than Bouchillon Performance. Sure
looks sweet when installed. Judging by your symptoms I would say your bands are
out of adjustment or your front servo isn't moving far enough to engage it. These
can be checked without removing the tranny and as a matter of fact the buisness
section of your tranny can be fixed without even removing it including the shifter
valve. Never be afraid to work on or rebuild a 727 as there is an excellent 11 part
video on YouTube of a complete tear down and rebuild and it's highly detailed.


I have changed bands, rebuilt servos, changed shifter valves and more with tranny
still in. If you pump is bitched ( which seldom happens ) the tranny has to be out.