Hard Shift from 1st to 2nd

zmarty27 said
Howdy, gang.

I took the Holley 1945 off for some much needed maintenance, and the thing is running like a champ. Only problem is, my slightly higher idle setting is causing it to shift hard from 1st to 2nd. Its gentle in relation to other "hard shifts," but it is certainly not normal for this occurrence. Is there a relationship between my Carb maintenance and my transmission. Crunching the numbers in my head and the only thing I can think of is lowering my idle setting.

Thanks for the help as always!

PSA: Running a '74 225 with the 1bbl (mentioned). Stock transmission and linkage. Only thing new are the gaskets and choke thermo.
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It's all that new found power you've got now!
Actually, it's not your idle setting (you didn't say if you meant idle speed or idle mixture when you say "setting", but I digress)- because you're not at idle when it shifts from first to second. My guess is your kickdown linkage isn't properly adjusted after you removed and replaced the carburetor.