• Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech

rear end bottoms out, dont know why.

  • Thread starter Thread starter Bri96GT
  • Start date Start date Sep 11, 2006
B

Bri96GT

New Member
Apr 7, 2002
14
0
0
Los Angeles, CA
Sep 11, 2006
#1
  • Sep 11, 2006
  • #1
I have a 96 gt 5 speed and on hard take offs, (from stand still or moving) there is a hard and loud grinding coming from the rear end. It is the driveshaft actually hitting the undercarriage i can feel it under the seat. i dont know how its doing it. the shocks and springs are fine. i have 275 tires and there being tore up on the upper wheel well .
The car has been lowered 2 inches and i did change the rear bump stop to a smaller one but that shouldnt cause the problem. Of course the problem worsens with passengers. Anyone have an idea what it could be? could it even be engine or transmission mounts?
 

tomustang

Psychotic Member
Founding Member
Jun 8, 2000
3,434
2
78
McLean Hospital
Sep 11, 2006
#2
  • Sep 11, 2006
  • #2
Bri96GT said:
I have a 96 gt 5 speed and on hard take offs, (from stand still or moving) there is a hard and loud grinding coming from the rear end. It is the driveshaft actually hitting the undercarriage i can feel it under the seat. i dont know how its doing it. the shocks and springs are fine. i have 275 tires and there being tore up on the upper wheel well .
The car has been lowered 2 inches and i did change the rear bump stop to a smaller one but that shouldnt cause the problem. Of course the problem worsens with passengers. Anyone have an idea what it could be? could it even be engine or transmission mounts?
Click to expand...
it's common with lowered cars, you'll bottom out no matter what unless you raise your car back up, using a different bumpstop won't change it either
 

nwapache

New Member
Jun 27, 2006
313
0
0
Seattle,WA
Sep 11, 2006
#3
  • Sep 11, 2006
  • #3
consider passing on the twinkies for a while?
If you are bottoming out on launches, sounds like weak springs. when you say "lowered" 2 inches, are you referring to a good spring kit, or did you cut coils off? It is a price you pay for dropping but different spring choices should help. what do you have currently?
 

triggz

Founding Member
May 15, 2002
1,218
0
37
Gadsden, AL
Sep 11, 2006
#4
  • Sep 11, 2006
  • #4
If the tires are hitting the inside of the wheel well (you mean the very top of it, or the sides?) then its lowered way too much.

If the tires are hitting the fender edge and eating the sidewalls, your wheels are set out too far to be lowered like that. You might be able to fix that by rolling the fenders.

Do you have wheel spacers or aftermarket rims?
 

loosescrew79

New Member
Dec 18, 2004
313
0
0
Sep 11, 2006
#5
  • Sep 11, 2006
  • #5
Or you can stop giving fat chicks a ride
 

Dope 97GT

New Member
Jul 16, 2005
439
0
0
Rochester, NY (SUNY Brockport)
Sep 11, 2006
#6
  • Sep 11, 2006
  • #6
View attachment 441103

I wouldnt think the driveshaft would be scraping or that would be a major concern. I would check to see if the tires were rubbing on the inner fender or outer or something like that.

My exhaust hits the ground if i have 3 others in the car.

Also if you have eibach sportlines the rear may have sagged so much you get rub as well.
 
B

Bri96GT

New Member
Apr 7, 2002
14
0
0
Los Angeles, CA
Sep 11, 2006
#7
  • Sep 11, 2006
  • #7
lol.. i give the big girls rides in the f-150!...thanks for replying guys..
i do have a spring kit (sportlines), i do have the tires spaced out for stance purposes...and the tires are shredding on the sides.. but my bigger concern is the grinding. i am certain it was the shaft but it could possibly be my exhaust. can any of the control arms go bad and allow for movement back there.
 
S

san~man

O-G
Founding Member
Nov 29, 1999
8,546
3
78
A little grass shack on a big lava rock
Sep 11, 2006
#8
  • Sep 11, 2006
  • #8
tomustang said:
it's common with lowered cars, you'll bottom out no matter what unless you raise your car back up, using a different bumpstop won't change it either
Click to expand...

Look, it's Tom the sellout

J/K bro, good to still see you around.
 

triggz

Founding Member
May 15, 2002
1,218
0
37
Gadsden, AL
Sep 11, 2006
#9
  • Sep 11, 2006
  • #9
Your exhaust pipes could be hitting the driveshaft. Take a look underneath, youll see very obvious scuff marks and shiny areas where its been hitting.

Your tires are hitting the fenders because of the spacers, remove them and your sidewalls will thank you.
 

Dope 97GT

New Member
Jul 16, 2005
439
0
0
Rochester, NY (SUNY Brockport)
Sep 11, 2006
#10
  • Sep 11, 2006
  • #10
Bri96GT said:
lol.. i give the big girls rides in the f-150!...thanks for replying guys..
i do have a spring kit (sportlines), i do have the tires spaced out for stance purposes...and the tires are shredding on the sides.. but my bigger concern is the grinding. i am certain it was the shaft but it could possibly be my exhaust. can any of the control arms go bad and allow for movement back there.
Click to expand...

If i think i know what your saying is you have wheel spacers with eibach sportlines with the tires being torn up. You most likely have the fenders rubbing on the tires that is the noise. If that is it get your fenders rolled and it should be fixed.
 
B

Bri96GT

New Member
Apr 7, 2002
14
0
0
Los Angeles, CA
Sep 13, 2006
#11
  • Sep 13, 2006
  • #11
thanks for all the info guys... the tip about my exhaust hitting the shaft makes sense...thats what ill look for and a pair of new springs.
 

BennyBlown2v

New Member
Dec 9, 2004
1,233
1
0
Carmel, INdiana
Sep 13, 2006
#12
  • Sep 13, 2006
  • #12
Get some nice thick urethane isolators. Those should raise you up a bit.
 
You must log in or register to reply here.

Similar threads

S
Differential noise over bumps
  • sharkrat
  • Apr 10, 2026
  • 2005 - 2009 Specific Tech
Replies
3
Views
155
2005 - 2009 Specific Tech Jun 18, 2026
TPony
J
2004 Mustang 3.8L V6 vibrations above 65 MPH and differential leaks
  • joeybuddy96
  • Mar 16, 2026
  • SN95 V6 Mustang Tech
Replies
16
Views
530
SN95 V6 Mustang Tech Tuesday at 2:38 PM
joeybuddy96
J
Rear ends? And I don't mean the pretty kind.
  • WORTH
  • Jun 27, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
16
Views
884
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- Aug 14, 2025
limp
Drive Shaft/Rear Diff Issue on 2014 GT
  • DudeStang
  • Jun 16, 2025
  • 2010 - 2014 Specific Tech
Replies
11
Views
1K
2010 - 2014 Specific Tech Jan 21, 2026
gkomo
P
Fox 17" Deep Dish Bullitts on Rear of Fox, 275/40/17?
  • pindude80
  • May 2, 2025
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
Replies
9
Views
719
1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- May 4, 2025
Noobz347
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1996 - 2004 SN95 Mustang -General/Talk-
  • SN95 4.6L Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?