Transmission shifts hard. Bumps really hard going from 1st to 2nd gear. on 1998 Mazda B2500

This truck has an automatic transmission. and bumps really hard going fromm 1st into second gear. Does this truck have a vacuum mogelator for the transmission?

2 answers
ck codes to start with and scan live data,could be several issues. seek FREE diag and est at aamco then shop prices
Have a mechanic check detent cable adjustment.