97 V6 4R70W 2 wheel drive 55k miles
When brake pedal is released from complete stop at traffic light, car moves forward with a jerk or clunk. But when the complete stop is brief like at a stop sign, it doesn't clunk or clunks less.

I read posts about lubricating drive shaft splines with teflon grease on 4x4. Does this apply to 2 wheel drives, too?

This is my second post about this problem. I was told to check fluid. All checked okay after repairing a minor leak. But I still have the same clunking problem.

EDIT: By the way, the clunking is right after brake pedal is released before gas pedal is pressed.

 

I have a 2000 V6 2WD with around 89K miles and have a similar problem...when coming to a complete stop the rear end clunks then when I start moving from 1-2 shift it clunks and jerks forward pretty hard. I was told to change the transmission fluid but haven't gotten around to it...maybe it might help...

 

Sounds like excessive backlash in the rearend. If thats the case, only real fix is new gears.

 

Remove the driveshaft and lube the female drive shaft spline at the front of the driveshaft with Teflon grease as posted elsewhere. While you have the shaft off check the U joints. Bad U joints can cause the same condition but usually they have some vibration associated with them. Yes the clunk fix applies to 2wd as well. Also the grease job will not fix the noise permenantly. In other words it will last for a while only to return at some point. Good luck

 

I bet you have a sticking "yoke". This is the device that compensates for the driveshaft needing to "change length" depending on the load in the truck. This is exactly what happened to my son's Ranger with exactly the same symptoms.