NHTSA Complaint #11526688 — 2017 RAM PROMASTER

2017, 119,000 miles. 8/9/18: maintenance transmission service at 62,651 miles. 6/4/20 Recall WOO shifter cable replaced. 11/11/21 AGM Interstate battery MTX-49 replaced. ISSUE: End of May 2022 (~117,000 miles) had driven from Florida & back 2x without any problems but was slowing down by taking my foot off the gas for exit ramp - the engine started roaring louder & the vehicle apparently had shifted to ?neutral - pulled off the road & shifted to P & then to D & drove on home without any further problem. That was #1 occurrence & I took it to a transmission shop in July (had not had the problem again) to see what they thought. They did road test, fluid check & scan of control modules for trouble codes/errors & analyzed data stream for inconsistencies - found no error codes or inconsistencies. Incidentally, have been having some type of parasitic draw on my new battery for the past year. Occurrence #2: almost a year later April 2023 I am driving up to 55 mph running errands & I slow down to 45 mph & the engine starts to roar & the van is coasting & the light up area of P-R-N-D backlight is not lit up that is normally lit up & no check codes/warnings have appeared - everything else including front drivers light panel all normally lit. I pull off into a parking lot, put in park, turn it off, then turn back on (still with unlit gear display) & I put in drive & it runs normally around the parking lot & the remaining way home.I have driven it locally for 40-60 miles each time with intermittent stops for about 4-5 times since then & can’t replicate the problem again. Incidentally still parasitic draw on battery. 1) could replaced shifter cable be a problem? 2) fuse #38 problem causing loss of power to solenoids? 3) transmission range sensor failing causing it to fall out of gear? 4) transmission control module problem? 5) solenoid problem? 6) worn/broken transmission bands? 7) worn out gears? - some cause putting into “limp mode”? This is dangerous situation?