What may be the cause, 05 4.7 L 4x4 Quad cab 5 sp trans. Trans bangs hard into drive only until it warms up. There is no slipping only a hard engaugement. Any ideas

 

The wifes 5.2 Durango does that a bit too. It is a good clean shift, I actually like it better than the mushy stock shifts. It worried her a bit at first, but 4 years later its still running strong and the same way. My guess was that it wants the tranny fluid warm before it does much slipping.

But, book says to flush tranny fluid every 30k. How many miles have you been?

 

I flushed it @ 30k, now have total of 50K on it.