3 weeks ago

2004 quid cab 2500 hemi 2 w d 135000 miles don,t use truck much anymore . noticed when drove it 3 weeks ago thay it was like brakes were on head no pep at take off . now to day in Moring it was not bad but in afternoon after I start out then stop it stays in 5th gear . head to put it in low then it takes off then sfift to 2ed it does not shift so its starting in 2ed but when you stop if you don,t shift to low it stays in 5th gear oil changed 3 times with amsoil vary pink and full on stick . please help .