Problem.......

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Hoseman

New Member

Feb 19, 2003

68

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Jun 17, 2004

#1

• Jun 17, 2004

• #1

I have heard this noise for a little while but didn't think anything of it. When I step on my gas (radio and everything off so I can hear), I hear a thud sound. As I release my foot off, I hear the same sound again. Its almost like a thud or clunk sound. Sounds like its coming from the drivers side rear. Any one?????

 

NosPony

New Member

Apr 2, 2004

278

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0

Canton, Il

Jun 17, 2004

#2

• Jun 17, 2004

• #2

Maybe ripped torque box?

 

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PonyBoy90

Founding Member

Aug 30, 2002

555

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Toronto

Jun 17, 2004

#3

• Jun 17, 2004

• #3

Maybe torque, but my understanding is torque boxes problems are usually noticed when cornering.

I'm thinking driveshaft?

 

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whitenblu89

Member

Jul 25, 2003

70

0

6

westland mi

Jun 17, 2004

#4

• Jun 17, 2004

• #4

i would guess u joints that sounds exactally like what mine was doing last fall. i would also get a really bad vibration at highway speeds when i let off the gas around 75mph

 

Mike86Stang

Advanced Member

Apr 11, 2000

10,296

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77

Red Lion, PA

Jun 17, 2004

#5

• Jun 17, 2004

• #5

U joint is my guess

 

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PonyBoy90

Founding Member

Aug 30, 2002

555

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Toronto

Jun 17, 2004

#6

• Jun 17, 2004

• #6

Time to take off that crappy stock iron driveshaft and get yourself a one piece FORD Racing Alum driveshaft and you'll never have to worry about it again. It'll knock off about 50 pounds of weight from your car too if not more.

You may want to look into getting this taken care of quick. An f-ed driveshaft can play havoc on your tranny, rear-gears and the tranny mounts. You may want to check on your motor mounts also.

I did all of the above in the last 6 months. First a new alum shaft, my tranny mounts were ok, and then I replaced my motor mounts which were falling apart. It's give me a whole new ride now !!!!!!

I too had the clunk sound, however not as bad as you. Mine was in the uphill load stage. When going from a stop to start on an incline I could hear the clunk in the back. Vibrations at high speeds were also an issue. So much so that my shifter vibrated too much also.

 

drgn5.0

Founding Member

Mar 13, 2001

603

0

0

Jun 17, 2004

#7

• Jun 17, 2004

• #7

there is not a 50 pounds savings from a steel driveshaft to aluminum.

more like 5-6.

 

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PonyBoy90

Founding Member

Aug 30, 2002

555

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Toronto

Jun 17, 2004

#8

• Jun 17, 2004

• #8

Wow, I'm embarrased! I woulda thought it was lighter. I'm way off on that assumption

Sorry

 

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v8only

Active Member

Jul 3, 2003

2,378

22

49

Jun 17, 2004

#9

• Jun 17, 2004

• #9

don't be so quick to condemn the oem driveshaft-especially if you don't have gears. At $260 a pop, an aluminum driveshaft is now on my list of "not a chance in hell" (actually I already have one)

I agree, check the u joints, HOWEVER,

it is common for bolts to work themselves loose. A very good possibility is that your driveshaft bolts have worked themselves loose. Verify they are still tight. (they need 85 foot pounds of torque, yet most use a 12 mm wrench to put them on, I sure as hell can't apply 85 foot pounds of torque with a six inch wrench!!)

I also had a thunking once, and my trans-bell bolts had worked themselves loose. Verify all trans to bell and bell to engine bolts are tight, verify the condition of your control arm bushings, and your torque boxes, and you'll find the source.

also worth inspecting is the rear wheel bearings. jack up the rear, and take the wheel off, grab ahold of the axle shaft by the lugs and move it around. Excessive play means your wheel bearings are shot.

 

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kevin2m4

New Member

Mar 16, 2004

50

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0

Barrie Ontario Canada

Jun 17, 2004

#10

• Jun 17, 2004

• #10

1$ on its a tranny mount worn out

 

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v8only

Active Member

Jul 3, 2003

2,378

22

49

Jun 17, 2004

#11

• Jun 17, 2004

• #11

good call

 

ECU5.0

Banned

Jan 10, 2004

1,803

1

0

raleigh, nc

Jun 17, 2004

#12

• Jun 17, 2004

• #12

what about the trac loc...they make a pretty nasty thud sound if they are bad dont they?

 

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Hoseman

New Member

Feb 19, 2003

68

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0

Jun 18, 2004

#13

• Jun 18, 2004

• #13

Thanks for all the advise. I have been working everyday for the past week, so this is the first time I was able to get on. The stang is in the shop getting the new Robinsons 3.73s put in and the brand new Super 40 series flows, so I am going to have them take a look at everything in the rear. Thanks again everyone.