strange thunk sound

[jmd2914]

when i go over bumps there is a thunking sound/ feeling coming from the drivers side floorboard down by my feet. almost like the tranny is hitting against the side of the tranny tunnel, but i checked my tranny mount and it looks to be ok. im stumped......help!

Joel

 

[Darkwriter77]

Transmission crossmember bushings worn/bolts loose? Floorboard metal is cracked around where the seat track mounts? Exhaust striking the transmission crossmember or underbody? Worn motor mounts and/or transmission mount allowing too much drivetrain movement? Just a few ideas.

 

[jmd2914]

i have an adjustable crossmember would that might have something to do with it? also if it does how can i get it to stop moving??

 

[Dark Knight]

Might check the front ball joints. Had that happen with mine, same thing, felt like something hitting the floor board.

 

[Dark Knight]

i have an adjustable crossmember would that might have something to do with it? also if it does how can i get it to stop moving??

The metal tubes that the rubber busings go in needs to be tack welded to the crossmember. Any muffler shop could do it for cheap or free.

 

[jmd2914]

i never had them tack welded they are still free floating. can that be my problem?