my trans wont shift down automaticlly when truck comes to a stop . i have to shift it down to 1st and shift up manually . OD works normally . trans has 320 000 k on it. stock TC and ashift kit. i think it might be the governer? anyone have any ideas?

 

Not a fan of noobs helping noobs but, I would start with checking tps and you linkage. Also get under the truck and unplug at the connections to the tran spray em with cleaner and then dielectric (sp) grease.