[78 monte]

Allright,a few months ago I put in a Jegs2200-2600 converter.Since installing it I lost the abilitie to pull it down into first from a roll(say30mph).I figured this to be cause o lower pump pressure due to the new converter.
Now tonight I'm swapin jets.I go to take it up the road I'm crawlin down the road in first shift to second now i feels like its in neutral.Shift to third and it feels still like neutral.Take it up the road turn around deck it to see how its runnin,shifts fine(neck snapping).
Why would it start this neutral feeling crap at low speeds all of a sudden????Is it a converter thing????Also theres no WERing(tranny slipping sound)??
The tranny fluid is full and clean.I tranny sevice it every summer.

[78 monte]

Well went to the track today.On the way back it started these antics at like 30mph.It seems lie now unless ou shift under exceleration it'll slip.And if it slips you've gotta gear down and reshift.Is this a converter problem,stuck valveoby or dieing tranny????