Well I sure hate to admit this but I got bent over backwards. I have a 2007 DTS. 198,XXX miles. I had the same oil leak DTS is synonymous for @ the rear main seal. Engine & transmission are/were fine no problems. I had a couple of extra dollars so i decided to get the oil leak fixed. Since engine was going to be dropped i had all engine mounts replaced, spark plugs changed and control arms replaced.Pick the car up drove it home no problems get back in it to run to the store & the transmission wont come out of 1st gear. Take it back to mechanic he kept it a couple of days said he didnt plug something up. Drive it back home no problems. Next morning same thing, wont come out of 1st gear. Now the damn mechanic is in JAIL & has been for about a month & shop doesnt know when he'll get out. I've dropped by several times to check see if hes out & hes not. 🤬 Any ideas on what could be going on with the transmission?