So just started to have this issue. Drove to the grocery store the other day and the truck acted normal. Finished shopping and started driving and the truck would shift into OD. Stayed in 3rd.  Pushed the OD button and it didn’t light up to indicate off. Drove it home, cleaned the battery terminals “saw a YouTube video about that” started the truck and the button worked. Shifted through all gears, checked the fluid all was normal. Drove it to work this morning, shifted fine. Next little trip I took about an hour later same little issue came back. 1. Where should I start troubleshooting? 2. Is it ok to drive to and from work like this? Thanks for the help!

1996 12valve AT “47/46 RE” not sure to be honest.

Grid heater connections under the drivers battery might be loose

PCM controls the OD shift. So you need to verify the the transmission power relay and fuse are good. Then make sure the ORG/BLK wire is not damaged. Basically the PCM just grounds that wire to make 4th gear shift.

 

Edited August 7, 20195 yr by Mopar1973Man

What is the trans temp doing the whole time this is going on?