ok this tranny is reman and ive put 1000 miles on it hoping the valve body would get broken in so this sucker would drop into OD, and, well...it WONT.

any switch or anything of the sort that could cause this?

i recently installed a vette servo in it, but im not sure if that would cause it to not drop into OD.

heres the scenario. on the highway, going 70, ....shift it onto OD, and take my foot off the gas completly....Rpms drop, goes into OD....

press the gas the slightest bit, and itll jump back into 3rd.

whats the deal here?