This just appears to be happening when the truck is cold. When the tranny goes into high gear and the converter locks up, the truck starts shaking IF I am just cruising along. If I mash down a little on the throttle the shaking stops. I seems worse when you are starting onto a small grade hill but again, if you mash down on the throttle it goes away. I cant tell for sure if the converter unlocks every time or not, but I purposelytried to not mash down enough to to kick down a gear. It will do this about the first 10 miles to the local 4 way stop. From there on it is fine. The fluid level is good, fluid is red and has no burnt smell. It shifts fine. I feel like its not an engine problem but can not be a 100% sure. Any ideas appreciated.
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