Ditto on the u-joints. My old 92 started sounding like a hammer ringing the bellhousing. I had the BIL-wrench listen and he immediately said u-joints. I dropped the shaft, took it in a $40 and 24 hours later I was happy again.

Hope that's all your is...

Big Truck: 00, 3.5, Endeavor, 5-Spd drive line in hand!
Little Truck: 87, 2.6T I/C, MT, LSDs, Tonneau Top
Her Truck: 03, 3.8, 20th Anniv, 65k
Daughter's: 06 Eclipse, Keeping it Mitsu!
FSMs: MitsubishiLinks.com