Thanks nick,
I never thought of that. But wouldn't it throw a code though? Or maybe not if it isn't consistant?

 

It won't throw a code if it's intermittent - you would have to hold it at that speed and force it to keep vibrating.

 

I think i drove it for about 20 min right at 65 after I changed out the diff fluid and it didn't set off any code. Would it need to be driven longer? Is there any way to manually check if there is a misfire?

 

Then it's not a misfire.

 

What about something strange going on with a coil? I've read alot of stuff that they can cause some weird things.

 

Well, I'm about to throw in the towel on this dang truck. I think i'm gonna start shopping around next week for a new vehicle. If anyone has any last minute ideas on something i can check out, please let me know. This is my first truck and I really wanted it to be a good truck... I'm just so frustrated.