I get this hard knock noise from suspension/transmission after driving about
While brevity may be the soul of wit, it sucks when trying to diagnose an automotive symptom. In other words, your car is either totally f**ked up, there may be a gorilla in the trunk trying to get out, or something in between.
What kind of car is it you're referring to?
Sounds like a loose rear shock mount or an upper strut bearing in front is worn out. However, could be as simple as a looseroad wheel. Need to put it up on a lift and start checking things out.
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