Strange Get-Up-And-Go Problem

[silver_pilate]

Well, having a little bit of a wierd problem for a while now. I'll describe it as best I can.

Basically, the car is a complete dog from off idle to ~3000-3500 rpm. When you hit the gas, the car acts like it's pulling up a long, steep hill. However, when you reach between 3000 and 3500 rpms, there is a point at which the power immediately comes on. It's almost like someone flipped a switch, it's that sudden. So from a stop, it goes: bog...bog...bog...bog...bo/POWER.

As near as I can tell, I really began noticing this after the tranny rebuild. Also, above 85 mph, the car vibrates like crazy, and it is definately speed related and definately not the tires/wheels. My theory is that the vibration is coming from the drive shaft...gotta get a new aluminum one sometime.

As for the power problem, I'm kinda stumped. I almost want to think that the problem is coming from my torque converter. During the rebuild, they sent off my PI to check its balance and they polished the hub. Also, with the car at idle or in park, the converter will whine for a bit and then quiet down, and my fuel economy is absolutely in the crapper. It seems that during the period where the converter is slipping (0-3000 rpm) the car is a dog, and then when it finally locks up, it takes off. However, I don't know why the change would be so sudden. Then again, maybe it's electrical.

Any ideas?

--nathan