So about a year ago I dropped the pan cleaned the screen and gave the tranny a good servicing. I've had no problems with it since I bought it almost 3 years ago. Today driving home from work out of nowhere it was stuck in first. I limped it into the nearest parking lot at 15mph and 3600rpms. Popped the hood and it hit me, I disconnected the kick down and throttle cable this weekend when I cleaned my throttle body up. I thought maybe the kickdown was off but it was fine. Fluid level was fine but it did have the aroma of gear oil. When I changed my Tcase fluid I thought it looked a little red. Then I started it back up, shifted through the gears put it in drive and it was back to normal! So my question is if that seal between the Tcase and Tranny is gone would the gear oil do enough damage to temporarily lock up my trans? And if so am I too late to change it and stop the damage............and last one, as a newb that has done a handful of work on it (knuckle rebuild, and some other minor work) I have access to a shop with a lift and an arsenal of tools, can I change that seal out myself with a little help? Sorry for the novel any help you guys can give is always appreciated. 178k on the tranny.