Hey everyone , i cdould use some help because i've pulled out pretty much all my hair at this point.

I purchased a 1982 240D Auto Transmission recently to convert to run veggie oil. The car was in great condition but now that i have modified the fuel and coolant lines it seems to be stuck in first gear . I know it had to be something that i did but cant figure it out.

Does this have something to do with the vacuum?

Or did i splice into the transmission fluid line ? I spliced into the hose that comes off where the big coolant radiator hoses connect

hellllpppppp