fst100

iTrader: (5)

Recently noticed and feel something hitting underneath the car between the driveshaft and the rearend. When I blip the throttle I *think* the driveshaft has some travel/play with the rearend cause I hear a thud sound. My buddy installed a spohn adjustable torque arm and adjusted the pinion angle. Would the pinion angle cause some travel(front to back movement) between the rearend and the driveshaft? Is that normal?
im also running a moser 12 bolt FWIW.

fst100

iTrader: (5)

after some researching, could it be a bad/worn U-joint? some typical signs say, a clunk when shifting from park/neutral to gear, which i will try out later today. however is the a slop when coasting down the road and blip the gas pedal and delayed thud/clunk sound coming from teh back also a symptom?

SS#2906

iTrader: (53)

Best guess is to check the torque arm bracket mount on the tranny.

I bet the mount came loose and that is what is making the thump sound.

fst100

iTrader: (5)

that was the first thing i checked but the top and bottom bolts were tight. is it possible the spohn ta has some back and forth movement? my only other thought is the 12 bolt moser and the gear setup has a bit of slop. i dont remember if i had this issue when i first bought it from RPM and drove it around but the car was down a few weeks later so i wasnt able to get alot of seat time.

slammed99

iTrader: (1)

did you check the tranny mount? i have had a few cars with that issue but normaly with stock torque arm.

fst100

iTrader: (5)

yep trans mount is new and not blown and the bolt is tight underneath it. does the TA flex or move forward/backward a bit depending on the momentum of the car?