Transmission Issue? Wouldn’t move forward in drive...

RPS99SHO · 2018-01-07T01:35:37+00:00

99 Limited 205k miles Trans flushed at 194k Jan 2016 External trans cooler added, bypassing radiator at 197k (preventative - no milkshake) May 2016 No leaks, fluid is good. No oil leaking from the axle seals (that I can see outside the drums) This morning, after starting it for the first time in about 10 days (10 days of high temps in the 20s; it was 14° when I started it today). It wouldn’t move in drive. Well, it would move, but only very slowly with lots of throttle. Felt like the trans was starting in 4th gear. Reverse worked just fine. Let it idle for a few minutes, same thing. Inched along forward with lots of throttle in drive, but reverse acts normally. The engine turnover was slower than normal due to the sitting and the low temps. Battery is two years old so should be good. I replaced the alternator at 200k Nov 2016. I didn’t wait around to let it warm up more, as I needed to be somewhere (took my 5th gen). Research shows that similar issues have been reported because of leaky axle seals freezing the shoes to the drums in cold temps, but that doesn’t answer the question about why it moves without issue in reverse. Electrical issue is something else that’s been suggested, but new(ish) battery and alternator mostly rule that out. No other electrical issues noted. I will let it warm up tomorrow and try again, and verify fluid level, but I am stumped. Anyone have any wisdom on this topic? Sent from my iPhone using Tapatalk