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  • 1996 - 2004 SN95 Mustang -General/Talk-

rear end diff

  • Thread starter Thread starter fatal1tywulf
  • Start date Start date Jan 6, 2019
F

fatal1tywulf

Member
Nov 4, 2018
22
2
13
putnam, ct
Jan 6, 2019
#1
  • Jan 6, 2019
  • #1
i am wondering if better to have limited slip diff or full posi ? what do you all think
 

wmburns

SN Certified Technician
Aug 14, 2009
5,892
514
204
Houston Texas
Jan 6, 2019
#2
  • Jan 6, 2019
  • #2
I think you should tell us HOW you intend to use the car. Questions such as:
  • Is this a track car or a street driven daily driver?
  • How much HP are you making?
  • What are your PLANS for the car?
  • What is your budget for the project?
Otherwise this is a purely academic discussion. Why? Because rarely are real world DIY'ers made of $$ with unlimited budgets.
 
S

stick shift

Member
Aug 28, 2018
19
2
13
chino hills ca
Jan 6, 2019
#3
  • Jan 6, 2019
  • #3
same thing, choices
1. posi is a trade name same as limited slip, trac lock etc
2. locked rear end or spool
3. detroit locker
Nothing wrong with the stock 8.8 ford posi unit. Many drag race stangs with slicks use them without a problem.
 
F

fatal1tywulf

Member
Nov 4, 2018
22
2
13
putnam, ct
Jan 6, 2019
#4
  • Jan 6, 2019
  • #4
wmburns said:
I think you should tell us HOW you intend to use the car. Questions such as:
  • Is this a track car or a street driven daily driver?
  • How much HP are you making?
  • What are your PLANS for the car?
  • What is your budget for the project?
Otherwise this is a purely academic discussion. Why? Because rarely are real world DIY'ers made of $$ with unlimited budgets.
Click to expand...
street driven daily driver/ spirited driving
 

Neuron

5 Year Member
Nov 6, 2016
859
192
93
Jan 9, 2019
#5
  • Jan 9, 2019
  • #5
My experience with the Detroit Locker on the street is not a positive one. Noisy sometimes, accelerated tire wear, kinda weird on turns and slick conditions. I think it is a trade off over an LSD. It is awesome if it fits your needs though.
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,997
224
Massachusetts
Jan 9, 2019
#6
  • Jan 9, 2019
  • #6
Stick with a limited slip. The full locker style rears tend to be more trouble than it's worth if the car is street driven, especially in the rain.

BTW, posi is a GM trademarked named for their limited slip. Gm is "Positraction", while ford is "Traction-lok". They are both limited slip differentials
 
F

fatal1tywulf

Member
Nov 4, 2018
22
2
13
putnam, ct
Jan 11, 2019
#7
  • Jan 11, 2019
  • #7
thanks for the input. next question is best place to look for an 8.8 trac lok disc brack rear? what cars can I source this? and will anything if anything be useful from the 7.5 in my car?
 
R

R4ymond

New Member
Dec 28, 2018
14
1
3
quebec city
Jan 11, 2019
#8
  • Jan 11, 2019
  • #8
I`m not sure if the ranger is a traction-lok LSD but they do have a 7.5 LSD that is interchangable(so ive heard) as is the final drive.

https://therangerstation.com/tech_library/axle_codes.shtml

Mustang5L5 said:
Stick with a limited slip. The full locker style rears tend to be more trouble than it's worth if the car is street driven, especially in the rain.

BTW, posi is a GM trademarked named for their limited slip. Gm is "Positraction", while ford is "Traction-lok". They are both limited slip differentials
Click to expand...

As a tech could you confirm?
 

Neuron

5 Year Member
Nov 6, 2016
859
192
93
Jan 11, 2019
#9
  • Jan 11, 2019
  • #9
What is it we are talking about, year, model etc etc?
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,997
224
Massachusetts
Jan 11, 2019
#10
  • Jan 11, 2019
  • #10
fatal1tywulf said:
thanks for the input. next question is best place to look for an 8.8 trac lok disc brack rear? what cars can I source this? and will anything if anything be useful from the 7.5 in my car?
Click to expand...

See this thread.
https://www.stangnet.com/mustang-forums/threads/1997-v6-rear-end-swap.907824/#post-9151890

To give a detailed response for your application, we need to know what you have. What year 7.5" are we talking about
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,997
224
Massachusetts
Jan 11, 2019
#11
  • Jan 11, 2019
  • #11
R4ymond said:
I`m not sure if the ranger is a traction-lok LSD but they do have a 7.5 LSD that is interchangable(so ive heard) as is the final drive.

https://therangerstation.com/tech_library/axle_codes.shtml



As a tech could you confirm?
Click to expand...

Both LSD 7.5 and 8.8 available. I think the LSD 7.5 is not that common.
 

Neuron

5 Year Member
Nov 6, 2016
859
192
93
Jan 11, 2019
#12
  • Jan 11, 2019
  • #12
The pre 1986 Mustang GT's had it but no rear disc brakes unless it is a '93 Cobra or SVO IRC.
 
Last edited: Jan 12, 2019

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,997
224
Massachusetts
Jan 11, 2019
#13
  • Jan 11, 2019
  • #13
Neuron said:
The pre 1986 Mustang GT's had it but no disc brakes unless it is a '93 Cobra.
Click to expand...

Correct.

But 86-98 mustang housings are all the same and the 94-98 V8 brakes and axle shafts bolt right in giving you essentially a 94-98 8.8 axle
 
F

fatal1tywulf

Member
Nov 4, 2018
22
2
13
putnam, ct
Jan 12, 2019
#14
  • Jan 12, 2019
  • #14
Mustang5L5 said:
See this thread.
https://www.stangnet.com/mustang-forums/threads/1997-v6-rear-end-swap.907824/#post-9151890

To give a detailed response for your application, we need to know what you have. What year 7.5" are we talking about
Click to expand...
2004 mustang 40th Ann. edition. 3-9 v6
 
F

fatal1tywulf

Member
Nov 4, 2018
22
2
13
putnam, ct
Jan 12, 2019
#15
  • Jan 12, 2019
  • #15
Neuron said:
What is it we are talking about, year, model etc etc?
Click to expand...
2004 mustang 3.9 v6 40th ann. edition
 

Mustang5L5

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,295
17,997
224
Massachusetts
Jan 12, 2019
#16
  • Jan 12, 2019
  • #16
fatal1tywulf said:
2004 mustang 3.9 v6 40th ann. edition
Click to expand...

You'll need a 99-04 Mustang GT or mach 1 8.8 axle. Only direct fit models
 

GDawg

Founding Member
Mar 22, 2002
1,469
19
68
Nevada
Jan 13, 2019
#17
  • Jan 13, 2019
  • #17
Mustang5L5 said:
Stick with a limited slip. The full locker style rears tend to be more trouble than it's worth if the car is street driven, especially in the rain.

BTW, posi is a GM trademarked named for their limited slip. Gm is "Positraction", while ford is "Traction-lok". They are both limited slip differentials
Click to expand...

Good bit of information there. I did not know that.
 
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