Heavy block of iron on rear

[doubleoh]

What is the purpose of the heavy iron block attached to the 3rd member below the pinion? How much does it weigh?

 

[broncojunkie]

Not sure how much it weighs and not entirely sure what it's for. I always remove it and have never had an issue. I will suggest having your driveshaft balanced, particularly if you switch to a lower gear. It's not very expensive to have done and might save you some headache in the long run.

 

[347HO]

I was told that damn thing reduces vibration and wheel hop and adds unsprung weight to the rear... Because we need weight in the rear.

I threw mine away.
I also threw the quad shocks away.
I weighed it, but that was more than 10 years ago, so I don't remember the exact LB's

 

[RCMUSTANG]

Vibration damper. That's all it;s for. Most people can get rid of it with no issue.