Speedo Needle sticks!!
Ok, figured this is an "old age" problem of the speedometer, here is what is going on...
I have the correct drive and driven gears in my transmission, brand new speedo cable (which I just can't get to quit dripping tranny fluid), and this needle sticks usually around 30 to 40mph. The needle will work fine, nice and smooth and tell the correct speed, accelerates along the guage in a fluid like motion like it should. But, when you decelerate, it tends to get stuck at around 30-40mph and not drop any farther, but when you speed up, and get past the mark it is stuck at, it works fine. All the while, the odometer is working fine, my mileage is dead on, so it's not a cable problem, and it's something with the needle mechanism itself. Also, if I let it set for a while, the needle will settle back to zero.
I assume I'm going to have to drop the dash and pull the cluster and lube something up. Which is no big deal, I have dropping the dash down to a science, and with the quickness. I just don't know exactly what I should look for, thought maybe some of you guys have ran into this and figured out the fix. That would ultimately save me time, haha.
This is on my 71 chevelle.