Originally Posted by Josephtsai
So I do check the shifting, it does start to take off from 1st, I think the sound comes before shifting to 2nd. I haven't try unplug the fuse47. If this is a prob of driveshaft, then why it happens only when I try to accelerate after come to a stop?
The car is designed [factory auto tune]to come to a almost a complete HALT in 2nd gear to save pollution that flies out of engine exhaust during engine breaking. Also coasts better for MPH numbers. Unfortunately, car manufactures have to tune for the Gobermints numbers not customers.
Once you are almost or at complete STOP, the trans will shift to 1st. Backlash all the way from the front to back of your drive train can make that feel like a little bump. In fact if I dot it right, the fron of the car moves forward when that happens. The tiny normal clearance from the flywheel , trans gears, u-joints, drive shaft, differential; all add up to normal backlash. I asked my local Ford Gear specialist about it and he explained it that way to me, I consulted other private shops and they said the same thing.