Fellas, i need your help once more. I had a problem earlier this year with my 89 trans 5.7 tune port injection it was running great then the anti theft system kicked in. Let me tell you this was a huge pain nobody could figure it out... so my friend just changed the bad boy to a carburator. Since then it s back to running great i love it. My question is should i change my transmission oil? I have no problems with the trans i just want to make sure it last a good amount of time. If so can someone explain to me a step by step process.