Hi, I was flying the 737-800 recently and I noticed that the triming was kinda broken. I was using the AI auto trim setting, but with that active, the plane randomly starts to go nose nose up, nose down constantly. It stops after some time eventually. 
if I turn of the setting, it’s very hard to trim. I was on final at 2000 feet and the plane was descending, but the nose was up like in the climb phase.

do you know how I can trim it easily?

or how can I make the auto trim setting work better?

3 minutes ago, Hyper14 said:

I was on final at 2000 feet and the plane was descending, but the nose was up like in the climb phase.

If you mean descending with 2.5° to 5° nose up attitude during final, that's typical. If you mean 15° nose up and descending, then either your airspeed is too slow for your flaps configuration and/or your aircraft's gross weight is too high.

Check that your aircraft weight is as expected for landing and that you are approaching at a speed that's appropriate for each flap configuration and above Vref on short final.

As for trimming, it's not replicated well in MSFS. What you need to do is apply a little bit of trim at a time and see where the aircraft sort of settles. I've never managed to have an aircraft hold pitch in any MSFS using manual trim.

1 hour ago, Hyper14 said:

Hi, I was flying the 737-800 recently and I noticed that the triming was kinda broken. I was using the AI auto trim setting, but with that active, the plane randomly starts to go nose nose up, nose down constantly. It stops after some time eventually. 
if I turn of the setting, it’s very hard to trim. I was on final at 2000 feet and the plane was descending, but the nose was up like in the climb phase.

do you know how I can trim it easily?

or how can I make the auto trim setting work better?

What the heck is the AI auto trim?   

1 hour ago, Hyper14 said:

do you know how I can trim it easily?

or how can I make the auto trim setting work better?

Turn off the auto trim.

Keep at the manual trim, but you need to appreciate you *will* be trimming a lot. Make sure you're at a correct speed for your configuration though - it's shown on the speed tape.

If you *really* don't like constantly trimming or just fancy a flight without it, then fly an Airbus, problem solved.

G

The AI pilot is drunk. If you turn flying duties over to the AI pilot, it will not do a very good job. 😉