I am getting a clunk when I let clutch out from a stop with my Spohn T/A and Moser 12 bolt setup. I have the t/a with the urethane front bushing and driveshaft loop. The torque arm looks like it sits really close to the driveshaft tunnel at ride height, so I think the diff is just moving enough to hit it with clutch engagement.

Any suggestions?
Thanks!

 

Do you have the chassis mount? i have the spohn chassis mount and you feel the clunk of the rear moving whenever you go from unloaded to loading the rearend ie start, slow shifting, etc...there is no rubber bushing absorbing the shock of the slight movement of the torque arm its being transmitted thru the floorboard

 

Ok, that explains it then. I do have the chassis mounted T/A.

It just didn't seem like it could move far enough to actually hit the tunnel.

Thanks!

 

its probably not hitting the tunnel...when you first start moving you are putting a rotational force thru the driveshaft that is gonna want to raise the pinion yoke up as it turns....the torque arm prevents this motion....that energy needs to be absorbed somewhere and since the rear housing isn't rotating and the torque arm has no flex, that energy is disappated into the floor board and thats what your feeling

 

Are there any wear marks on the driveshaft or loop? If you had red powdercoating on your driveshaft or scuff marks on the loop, that would be a pretty easy way of knowing if they are contacting each other. The aftermarket torque arms are noisier over the factory ones as pointed out above, I definitely noticed more road noise after installing mine.

 

Ya I know it's not hitting the tunnel, I kind of worded that wrong. I meant I am feeling it through the floorboards because it wasn't possible for it to hit the tunnel.

 

Yep unfortunately thats the price you pay to hook the tires up haha