Auto transmission not smooth 1st to 2nd

Check the sensors on the transmission. May just be corrosion on the sensors or it may be a faulty sensor. Also, the torque converter bearing may have went bad due to the running it on low transmission fluid.

I would start by replacing the transmission fluid, that will likely resolve the issue.

check transmission oil or atf

fluid has a wierd smell !!!! What color is it ? brown , black ? Burnt smell ? Transmission is burnt . Clutch packs fried .

Sounds like torque converter, or pump in the transmission is going bad.

The transmission control module.

Doesn't sound like a simple fix. I would suggest having it serviced.

you need to replace clutch pack for that gear can be ordered seperately from parts store or dealer if you want to save money call peach street auto recycling at 1800-365-2341 for a warrantied used one! also might be time for change trans filter and fluid filter could be slightly clogged but I lean towards clutch pack I replace these alot on Hondas

Have you tried taking the car in for maintenance? Usually on most (older) auto transmissions there is a hose coming off of the exhaust manifold or carburetor area that provides the pressure for the transmission fluid. If that hose doesn't have a good seal, your shifting may be difficult and the transmission may not stay in the gear you want it to.

I had the same problem with my car it is not a major problem your car probably has high mileage, You can replace your torque converter replaced but that will be expensive, The price to fix it completely outweigh's the problem.

What I suggest and works for me is while the trans is still cold just anticipate the shift from 1st to 2nd and just before the change occurs eas of the accelerator and then when the car has changed from 1st to 2nd just accelerate again.