i have a lot of question's about my 98 1/2 and hope you guy's can help 1. it feels like converter drain back if my truck sit's for a while ?does not want to go in gear ? 2. turbo silencer ring removal ? i have read spec's on truck's and they are removed , how and why. 3. synthetic gear lube in my limited slip rear diff ,any problem's ? 4. no oil pressure on start up [but not all the time ]. thank's for the help tony b