Strange noise in automatic 307 transmission

Hello friends; My vehicle on the hill faints you know. I just had the general maintenance done. I would have the MAF sensor and throttle cleaned. I changed the spark plugs and the ignition coil. The result is still the same. What is the problem caused by? Also, lately, when I pulled my foot off the gas while going downhill and when I loaded and released the gas in the park, I think the gearbox crackled (like iron rubbing). I would be glad if our friends who have similar problems or experience can help. Identification of the vehicle: 307 2003 automatic gasoline at 185 thousand km