Hi, new to this and I couldn't find any threads on this. The knock is a low muffled sound coming from around the back of engine. It's a v-6 gasoline auto trans. I checked under and nothing is loose. Any suggestion before I pay lots of money to a shop for this. thanks

 

check for a hole in ur muffler

 

its coming from the engine or trans area. the muffler does have a drain hole in it, but no other hole

 

drain hole in the muffler???

 

You've never heard/seen of a drain hole in the muffler? You might wanna go look at them at the parts store.

 

i would think a drain hole in the muffler would be bad ? air leak causing that sound i have seen alot of mufflers never seen one with a hole in it that had a purpose

 

No, they have holes in the muffler to let water out, so it causes less of a rust problem for it.

 

i understand that but any hole in the muffler would be a leak i no there is some companys that do that but i no my stock muffler never had a hole in it

 

I'm sure he knows the difference between a drain hole and a legitimate hole, since he specified it was a drain hole.

tj_110, you might want to try to figure out where the sound is coming from. you said back of the engine or maybe transmission area. Can you crawl around and try to figure out which one?

 

i did not say he didnt no the difference but i dont recall dakotas having a drain hole in the mufflers ? only thing iv ever seen with a drain hole in the exhuast was a vehicle with stacks or a atv and bikes