Possible trans issue?

[oct6454]

Well as the title states I think I am having some type of a tranny issue. It occurs when my truck is going into OD with moderate to full throttle applied. As the truck begins to go into OD the truck will shake violently until it locks into OD. Not sure what it is because my TC doesnt feel like it slips at all and that shaking is the only problem the tranny is giving me besides the OD hunting which I'm on my way to fixing already.

Thanks, Oliver

 

[Olee Poole]

Sounds like TC lock up clutch.. Count your shift your trans with shifts into OD and then lock up last.

Newer trucks 01 up will lock up in 3rd then shift into OD last.

Thanks!