odd grinding at stoplights
Thread Starter
Staging Lane
Joined: Apr 2014
Posts: 94
Likes: 0
From: Michigan
odd grinding at stoplights Lately ive been getting this weird grinding noise from my car at stoplights, with the tranny in D and the brake pedal depressed. At first I assumed my exhaust was vibrating and chaulked it up to bad motor mounts. However when I slide the tras into N the noise goes away. Perhaps a bad forward sprag? Or another sign of my tourqe converter bad? Any insight would be greatly appreciated.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
A grinding sound from the forward sprag would indicated imminent failure, if not already.
Does the sound exist in Reverse too? If yes, you can probably rule out the trans.
Sounds are hard to diagnose, but I have never read a post hear about a trans causing a grinding sound at a stop light.
Does the sound exist in Reverse too? If yes, you can probably rule out the trans.
Sounds are hard to diagnose, but I have never read a post hear about a trans causing a grinding sound at a stop light.
TECH Junkie
Joined: May 2012
Posts: 3,050
Likes: 716
From: Poplarville, MS
It still could be your exhaust. When in drive the engine torques over and the left side of the engine, trans and exhaust raises up. When you put it in neutral the engine will go back to its normal unloaded place. But I don’t know if I would describe an exhaust rattle as a grinding noise. As mrvedit said it is highy unlikely it is the forward sprag.
