overdrive rumble

hello everyone,

proud one owner 230k 1st gen. tundra owner, has been an amazing truck and a rock for me since I was a young man. I now have my first mechanical issue and am coming to this page for advise. Problem started about a month ago, as soon as I shift into fourth gear a harsh rumble kicks in but once I take the O/D button off it goes away, at first thought was maybe tires or ball joints, like a suspension issue. Then I thought maybe driveshaft issue which I don't believe it to be now either, but could possible be but doubtful because I have inspected the U joints and bearings seems to be find. Plus once I hit the O/d button and it goes away makes me suspicious think its not the drive shaft. After reading some forums and thinking could be a solenoid for torque converter ? any ideas or insight would be great thanks.

 

Welcome from Arizona. I can't answer your question but there are a lot of knowledgable people on this forum and I'm sure that you'll be able to get some answers to your question.

 

Welcome. Not familiar with your problem, but will be interested in your solution once you figure it out.

 

I know when my torque converter went out I had like 2 days notice, and I pay attention to every tiny sound or bump my truck makes. I pulled into a gas station and when I went to leave it's like your stuck in park. It might be a transmission problem, especially with so many miles on it. Check your trans fluid and try to determine if it's consistently a fourth gear problem.

 

These early transmissions are known for forth gear transmission issues . Have you ever changed the fluid?