Archived 47RE will not shift out of 1st

[SLJolley]

We have a 2002 with an auto that will not shift out of first gear until we drain the battery down to 10 volts. After we drain the battery & jump start the truck - it will shift normal until the battery is fully charged & the truck turned off. When it is restarted with a charged battery - it will not shift. It seems like it has something to do with the key cycle or ecm power up. The trans was modified by a DTT authorized shop app 2 years & 20,000 miles ago - so we haven't been able to take it back to them. The shop is a couple hundred miles away. It has worked excellent up until about 2 weeks ago. We have changed the pressure solenoid, pressure sensor, speed sensor, APPS, fluid & filter. Called DTT several times - verified the voltages at the noise filter etc. Has anyone experienced anything similar?????????

 

[ScottLewis]

Probably not the same issue but check out my previous post, "Serious Problems" and what I finally came up with as a cure. Are you getting any troublecodes?

Much of what I've read suggests that the vehicle speed sensor is involved when the 47RE sticks in first. My 98 had 2, one on transmission and the other on the diff. Turned out it was a wiring problem at the PCM.



Dan