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Dangerous posi issue, please help! Almost died.

  • Thread starter Thread starter mustang_jr+
  • Start date Start date May 17, 2010
M

mustang_jr+

Member
May 8, 2003
150
1
18
May 17, 2010
#1
  • May 17, 2010
  • #1
I had my posi rebuilt and put in. Car was fine for a day
until I was shifting from 2nd to 3rd at wot and
the rear locked up solid and the car was basically dragging the
rear.

I backed out into neutral, and it did the same thing until I slowed down to
40mph and dropped it into 3rd.

Coming home after that, going downhill, not accelerating,
shift to third, rear locks solid, card dragging the wheels.

This is crazy dangerous, I almost died the first time
as the car fishtailed back and forth.

Any idea? It has all new clutches. I was reading it might be a bad spider gear??

96 cobra...
Please comment this is bad and I have no desire to wind upside down in
a ditch.
 

tx65coupe

Active Member
Nov 29, 1999
1,551
1
37
May 17, 2010
#2
  • May 17, 2010
  • #2
It could be an issue with the ring and pinion gears. Does it make a lot of noise too?
 

Tanus

New Member
Dec 11, 2009
847
1
0
A to the Z
May 17, 2010
#3
  • May 17, 2010
  • #3
holy chit, Id guess its the spyder gears also, if it was R&P, after it locked once it'd usually stay locked.

take it apart, post pics
 

COBRA90GT

Mustang Master
Sep 22, 2001
6,654
0
87
HOCKEYTOWN ® , MI
May 17, 2010
#4
  • May 17, 2010
  • #4
Who rebuilt it? Might want to have a word with them...
 

ThePumpkin

New Member
Jan 26, 2009
55
0
0
Missouri
May 17, 2010
#5
  • May 17, 2010
  • #5
First, Its good to see you made it okay.


COBRA90GT said:
Who rebuilt it? Might want to have a word with them...
Click to expand...


yea I woulda taken the car back and bitched a lot. Thats why people always say go with a very reputable shop to do rear-end work... Yank it out.... see what the deal is, and have someone else rebuilt/install it.
 
M

mustang_jr+

Member
May 8, 2003
150
1
18
May 17, 2010
#6
  • May 17, 2010
  • #6
tx65coupe said:
It could be an issue with the ring and pinion gears. Does it make a lot of noise too?
Click to expand...

No noise, when it's going to hell it sounds like popping noises.
 
8

8.8mustang

Member
Aug 20, 2006
67
0
6
washington
May 17, 2010
#7
  • May 17, 2010
  • #7
there is a dowel pin that runs through the posi it has one small bolt that holds it in and the pin holds the spider gears these can back out and lock against the housing of the rear end pull the cover and look if it did most likely just pull and junk the rear end
 
M

mustang_jr+

Member
May 8, 2003
150
1
18
May 20, 2010
#8
  • May 20, 2010
  • #8
It looks like I broke my torque box.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
95
134
May 20, 2010
#9
  • May 20, 2010
  • #9
That sucks man, what are you going to do?
 
M

mustang_jr+

Member
May 8, 2003
150
1
18
May 20, 2010
#10
  • May 20, 2010
  • #10
I'm going to have to reweld it or get tougher ones.

I knew I should have put in a panhard bar, but I never
did and this happened.

It's a lot cheaper and easier to fix than if I blew up the rear.

14 years of driving is a long time, so I guess stuff is prone to
breaking as our cars get older. I also did some stuff
that added power and I guess it was too much.
 
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