clunking noises etc drivetrain car is on lift now

[costas14]

okay so were done for the day so i put the gsx on the lift, like i said in my other thread it was clunking when driving, so i put it in drive i lifted it up and it was going 20mph by itself no noises or crap, i hit the gas and it shifts gears and it starts vibrating, the other mechanic here looked at the driveshaft and says it rotates okay, but we would have to take it out this week to really see if the joints are frozen, they are rusted for sure, but when i hit the gas and it shifts up or down it is pretty harsh

 

[costas14]

well we got it up to about 100mph on the lift and still no noises, i drove it home no noises until a mile away from home, then grrrr clunk clunk clunk grinding, from the front, and this was when i let go of the gas