Ok I have a 72 Jimmy with 6" lift out back and and 4" in front. I recently put a 14FF w/gov-loc in the rear and D60 in the front. Then I swapped the rear yoke on the T-case to accept a 1350 joint and had a custom drive shaft made for the rear. Now I have a new vibe. It sounds like gears clattering. When I get up to about 40mph and let off the gas it does this then when I ease back onto the gas same thing. It goes away with constant throttle pressure. Any ideas what it could be? Oh yeah I have an SM465 which was rebuilt about 2 years ago so I doubt it's that. And the angle from the T-case yoke is within a couple degrees of the yoke on the rear end. I never had this vibe running the stock shaft with a conversion joint. What should the yoke on the rear of a 205 be torqed to? I torqed it to 95ft/lbs could this be causing the noise? Please help I'm stumped.