No third or fourth upshift by transmission after tcc module replacemet. on 1999 Chevrolet Blazer

Had no communication with tcc module until replacement. Transmission downshifts upshifts one to two fine but goes into a neutral mode when you over 30mph.It does go into 4wd drive now.

by in Schaller, IA on September 04, 2013
1 answer
ANSWER by on September 04, 2013
Whar are the codes?