727 won't upshift 1-2 or 2-3 without lifting throttle?

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Old 09-29-2019, 10:54 AM
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727 won't upshift 1-2 or 2-3 without lifting throttle?

Hi!
Been working fine 1.5 years ( except for 2-3 flareup below) and out of the blue I went to return home after 1 hour cool down and it wouldn't upshift (1-2 & 2-3) until I lifted throttle.
Linkage & throttle lever shaft function looks correct.
Fluid level good. First & reverse fine.
history: 40k mi on rebuild 35 years ago.
Transgo shift kit 1.5 year/5k miles ago. never got rid of a (mild) 2-3 flareup subsequent to kit install.
I plan on going over the linkage adjustment again, then dropping pan to take a look see.

Any ideas?

thanks

Last edited by droptail; 09-29-2019 at 10:55 AM. Reason: wanted to say hi
Old 10-01-2019, 05:59 AM
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Something is not rite for sure... Flairup should have went way with the shift kit. Also Reset the band adjustments if you have not done that yet.
Old 04-10-2020, 08:23 PM
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Sometimes the return spring for the kickdown rod gets weak or breaks or falls off.
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