Mufflers Rubbing on Drive Shaft

93gtmustang

10 Year Member

Oct 21, 2006

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Oct 4, 2007

#1

• Oct 4, 2007

• #1

I have a FRPP Aluminum Drive Shaft and Flowmaster Exhaust on my 93 GT Mustang.
I noticed wear markes on the drive shaft next to the mufflers. Also up towards the the front, maybe rubbing on the drive shaft loop? There's very little clearance between the drive shaft and mufflers.
Has anyone had any problems like this?
I think it's happening when the car squats on the launch when drag racing.
Any suggestions would be great!
Thanks

 

N

NOmoreHONDA

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Jul 18, 2007

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Northshore,Ma

Oct 4, 2007

#2

• Oct 4, 2007

• #2

are you hangers to short???

 

jrichker

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Dublin GA

Oct 4, 2007

#3

• Oct 4, 2007

• #3

Mine does the same thing when the rear axle drops when the car is on jackstands. If the hangers are in good shape, the fix is to loosen the clamp bolts for the joint between the H pipe and muffler. Then rotate the muffler away from the drive shaft. Tighten the clamp bolts for the joint and it should be better.

 

93gtmustang

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Oct 21, 2006

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Oct 5, 2007

#4

• Oct 5, 2007

• #4

Thanks for the help.
The only problem is that the exhaust is all welded except for where it is bolted on to the headers.
When the the car is off the jack stands, there is about an inch or so clearance between the mufflers and the drive shaft. Up on the jack stands there is very little clearance.
The rubbing must be happening when the car launches and squats I guess?
Thanks

 

M

mike93lx

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May 22, 2003

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Hudson, MA

Oct 5, 2007

#5

• Oct 5, 2007

• #5

the flowmaster cat backs fit like crap in general. On the passenger side of my car, the muffler bangs against the frame, the tailpipe rubs my tire and the tip is set in 2 inches further forward than the driver's side.

 

Darkwriter77

Resident Ranting Negative Nancy

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Jul 1, 2005

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Apache Junction, AZ

Oct 5, 2007

#6

• Oct 5, 2007

• #6

mike93lx said:

the flowmaster cat backs fit like crap in general. On the passenger side of my car, the muffler bangs against the frame, the tailpipe rubs my tire and the tip is set in 2 inches further forward than the driver's side.

Click to expand...

Wow ... yours must've been welded by the same dude that did Frankenstang's, because that's EXACTLY how her Flowmaster cat-back fit, as well - tailpipe short on the same side, and everything!

 

91 HATCH

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May 17, 2007

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illinois

Oct 6, 2007

#7

• Oct 6, 2007

• #7

i had to park in between two trees and use ratchet straps to pull them apart more it was not easy but it worked

 

HISSIN50

"How long does it take to get help in here?

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Oct 6, 2007

#8

• Oct 6, 2007

• #8

91 HATCH said:

i had to park in between two trees and use ratchet straps to pull them apart more it was not easy but it worked

Click to expand...

Literally a shadetree solution.





Mine have done the same thing, even with a stock DS. If you happen to have older boxier Flowmasters, switching to the newer ovalish style can help a little.

Good luck.

 

RsStanG1987

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Dupont PA

Oct 6, 2007

#9

• Oct 6, 2007

• #9

Ive never had a problem with any flowmaster component.. I would have it cut readjusted and rewelded sod it dosent rub the driveshaft. The only problem i had with my exausht was bad motor mounts and my headers rubbed the steering shaft because of it..

 

Reactions: Aaron

cenok is family

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Jun 25, 2003

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Norman, Ok

Oct 6, 2007

#10

• Oct 6, 2007

• #10

my spintechs rub a little bit every once in a while on launches. a buddy's family owns a local muffler shop here and i had him make me an H pipe. i'm gonna have him fix it sometime though.

 

93gtmustang

10 Year Member

Oct 21, 2006

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Oct 10, 2007

#11

• Oct 10, 2007

• #11

How about if I just elimanate the H-Pipe all together, which will give me more play to spread the mufflers out?

 

93gtmustang

10 Year Member

Oct 21, 2006

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Oct 13, 2007

#12

• Oct 13, 2007

• #12

Are there any disadvantages to eliminating the h-pipe?

 

cenok is family

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Norman, Ok

Oct 13, 2007

#13

• Oct 13, 2007

• #13

do you mean not have an exhaust? yeah you'll sound like a truck and have no back pressure.

 

93gtmustang

10 Year Member

Oct 21, 2006

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Oct 13, 2007

#14

• Oct 13, 2007

• #14

cenok is family said:

do you mean not have an exhaust? yeah you'll sound like a truck and have no back pressure.

Click to expand...

I mean, still running my full exhaust. Just eliminating the H-Pipe.
Not running a crossover pipe of any sort.
Just seperate dual exhaust.
Thanks

 

Mustang78

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Feb 8, 2006

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Aberdeen, WA

Oct 13, 2007

#15

• Oct 13, 2007

• #15

no downside except maybe a few HP loss, and it will change the sound some..the upside is easier installation and if one pipe smokes blue, you know which half of the engine is doing it