Help!!!! Klunking

Notchback5.0L · 03-20-2003, 05:57 PM

Hi there, I own a 1991 notchback 5.0L and it seems every time I let my car sit for a while when I start to drive it during acceleration it seems to be fine but if I let off of the gas really quick completely I hear a god awful KLUNKING noise coming from underneath the car, kind of in the middle of the car.

If anyone can please help me and let me know what this noise could possibly be that would be greatly appreciated

Thanks!!

Old Guy with 87 GT · 03-21-2003, 06:27 AM

might be the transmission mount

RDMumfts Stang · 03-21-2003, 08:56 PM

could be your U-Joints also.

Notchback5.0L · 03-25-2003, 12:37 AM

How do I know for sure that it is my u-joint, I know that if there is alot of free play on my u-joint then that means it needs to be replaced but how much movement should there actually be if any?

THANKS!!!

RDMumfts Stang · 03-25-2003, 06:42 AM

U-joints are cheap so if there is any freeplay or any question and they have not been replaced before I would change them. It is relatively easy to do. When mine started clunking, it didn't take long for one to snap. Fortunately it was the rear joint. Replacements are usually heavier duty than the stock ones.

03-20-2003, 05:57 PM	#1
Notchback5.0L Registered Member Join Date: Jan 2003 Location: Saskatchewan,Canada Posts: 10	Help!!!! Klunking Hi there, I own a 1991 notchback 5.0L and it seems every time I let my car sit for a while when I start to drive it during acceleration it seems to be fine but if I let off of the gas really quick completely I hear a god awful KLUNKING noise coming from underneath the car, kind of in the middle of the car. If anyone can please help me and let me know what this noise could possibly be that would be greatly appreciated Thanks!!

03-21-2003, 06:27 AM	#2
Old Guy with 87 GT Registered Member Join Date: May 2001 Location: Harrisburg, Pennsylvania Posts: 379	might be the transmission mount __________________ the "not so old",old guy 87 Mustang GT T-top >hanlon t-5, pro 5.0, centerforce clutch ,adj. cable/quatrant ,3.27s ,full 2 1/2 ex(off road H) adj. reg. ,e-cam ,70mm TB, cobra intake ,1.7rr ,ported/milled e7ets w/crane springs ,306 balaced/decked short block w/speed pro forged flat top pistons ...257rwhp/302rwt best et 13.7@102 (4/11 ) '80 Capri (future project,currently collecting parts for 351 moter)

03-21-2003, 08:56 PM	#3
RDMumfts Stang Registered Member Join Date: Mar 2003 Location: Wichita, KS Posts: 53	could be your U-Joints also. __________________ Most recent project: installed new HD T-5 w/Pro 5.0 Shifter, LUK Clutch, Prothane Engine and Trans mounts. Currently breaking in clutch. Next: complete tune-up

03-25-2003, 12:37 AM	#4
Notchback5.0L Registered Member Join Date: Jan 2003 Location: Saskatchewan,Canada Posts: 10	Thanks!! How do I know for sure that it is my u-joint, I know that if there is alot of free play on my u-joint then that means it needs to be replaced but how much movement should there actually be if any? THANKS!!!

03-25-2003, 06:42 AM	#5
RDMumfts Stang Registered Member Join Date: Mar 2003 Location: Wichita, KS Posts: 53	U-joints are cheap so if there is any freeplay or any question and they have not been replaced before I would change them. It is relatively easy to do. When mine started clunking, it didn't take long for one to snap. Fortunately it was the rear joint. Replacements are usually heavier duty than the stock ones. __________________ Most recent project: installed new HD T-5 w/Pro 5.0 Shifter, LUK Clutch, Prothane Engine and Trans mounts. Currently breaking in clutch. Next: complete tune-up

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