The simple check for transmission-related problems should be obvious- - - -SHIFT TO NEUTRAL BEFORE STOPPING! If the bog remains, you definitely don't have transmission problems. If it goes away, or there's a noticeable improvement, try tinkering with the idle speed. If you're running a 350C or a 700R4 with a torque converter lockup clutch, the clutch might be dragging or failing to release fully as the vehicle stops. 700R4's were notorious for converter clutches failing to release and causing engine stalls at stoplights.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!