[suss6052]

Originally Posted by Ysteven

Interesting. Not sure where bell housing is. Is it area where clutch assembly sits? If it is, then I doubt it's my problem. Cause I seen my clutch assembly on the table after replacement and it looked like new with no oil or metal dust on it.

Yes that's where it is, its the metal shell between the engine flywheel and the torque converter or clutch assembly.

Wikipedia is succinct about this for once.

"Bellhousing" is a colloquial/slang term for the portion of the transmission that covers the flywheel and the clutch or torque converter of the transmission on vehicles powered by internal combustion engines. This housing is bolted to the engine block and derives its name from the bell-like shape that its internal components necessitate. The starter motor is usually mounted here, and engages with a ring gear on the flywheel. On the opposite end to the engine is usually bolted to the gearbox. However, on some transmissions, the bellhousing is a nonremovable part of the transmission case. This is particularly true with front wheel drive transmissions, which are much shorter than conventional rear wheel drive transmissions.