Tranmission Upshifting / Down Shift SLAM

[Ikkesh]

The Transmission Just this morning began to Slam HARD approaching a stop sign downshifting while in "D" Drive. and thereafter upshifting through every gear in "D" Drive and back down through the gears.

Idea's Solutions?

I see no Transmission Fluid leaks, Not realy sure what to do and if need be where do Do I get A Good Transmission to replace it at a good price? I Live in Juneau Alaska and Shipping is Barged from AML in Seattle

Any Help or ideas appreciated.
Chris