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

spline 31 !!!??

  • Thread starter Thread starter east_sidaz40
  • Start date Start date Jul 7, 2005

east_sidaz40

New Member
May 14, 2005
189
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Jul 7, 2005
#1
  • Jul 7, 2005
  • #1
can anyone please tell me the advantages of the spline 31 . I mean if i installed it, what will it do for me!??

your info will be greatly appriciated

thank you
 
T

tjm73

Founding Member
Aug 3, 2000
2,418
2
48
Rush, NY
Jul 7, 2005
#2
  • Jul 7, 2005
  • #2
east_sidaz40 said:
can anyone please tell me the advantages of the spline 31 . I mean if i installed it, what will it do for me!??

your info will be greatly appriciated

thank you
Click to expand...

All it will do is add strength to the rear axles. It won't make more power or add anything other than strength to the axle assembly. It'll be less likely to break under a high RPM, sticky tire type launch.
 

east_sidaz40

New Member
May 14, 2005
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Jul 7, 2005
#3
  • Jul 7, 2005
  • #3
tjm73 said:
All it will do is add strength to the rear axles. It won't make more power or add anything other than strength to the axle assembly. It'll be less likely to break under a high RPM, sticky tire type launch.
Click to expand...
so your saying under street conditions, non sticky tires , non Hard launches. There is no way to mess up my rear end with the spline 31. is that right!?
 

DropTopPony

Noob Slayer
Founding Member
Aug 13, 2002
2,570
3
48
south jersey
Jul 7, 2005
#4
  • Jul 7, 2005
  • #4
east_sidaz40 said:
so your saying under street conditions, non sticky tires , non Hard launches. There is no way to mess up my rear end with the spline 31. is that right!?
Click to expand...


they should handle street abuse just fine, but you also have to upgrade to a 31 spline differential to go with the 31s axles.
 

Newbie143

New Member
May 22, 2005
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Jul 7, 2005
#5
  • Jul 7, 2005
  • #5
droptopponynj said:
they should handle street abuse just fine, but you also have to upgrade to a 31 spline differential to go with the 31s axles.
Click to expand...
No i meant just installing the spline 31 diffrential!!!!??
will that be good and okay?
 

Newbie143

New Member
May 22, 2005
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Jul 7, 2005
#6
  • Jul 7, 2005
  • #6
is that possible, coz i'm thinking of doing it as well
 

csledd

Official Ovary Punching Member
Founding Member
Aug 18, 2001
1,115
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0
Paducah, KY
Jul 7, 2005
#7
  • Jul 7, 2005
  • #7
Spline 31's are great insurance I dunno why you'd really want to do it if you're not running DR's/slicks and going to the track Maybe if you're doing some serious street racing. But they are fine for street use also.
 

tomustang

Psychotic Member
Founding Member
Jun 8, 2000
3,434
2
78
McLean Hospital
Jul 7, 2005
#8
  • Jul 7, 2005
  • #8
You should also Weld The Axle Tubes.
 

stangman

15 Year Member
Jul 10, 2003
2,690
10
69
in a 3 bed, 2 bath
Jul 7, 2005
#9
  • Jul 7, 2005
  • #9
Newbie143 said:
is that possible, coz i'm thinking of doing it as well
Click to expand...




not possible if you plan on using the stock axles
 

AdRock

Member
Nov 13, 2003
521
1
19
South Texas
Jul 8, 2005
#10
  • Jul 8, 2005
  • #10
Newbie143 said:
No i meant just installing the spline 31 diffrential!!!!??
will that be good and okay?
Click to expand...

Not possible. You can't mate 28 spline axles with a 31 spline diff.
 

Modular2v

Founding Member
Jun 30, 2002
3,222
23
99
oklahoma
Jul 8, 2005
#11
  • Jul 8, 2005
  • #11
what are the adavantages??? try rev limiter launches on slicks !!! my 31 spline eaton diff was 325$ and my 31 spline axels were 225$ so i have quite a bit invested in my rearend....it will cost you even more if you dont know how to install them
 

hognutz

New Member
Nov 12, 2002
1,940
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0
albany, oregon
Jul 8, 2005
#12
  • Jul 8, 2005
  • #12
If you dont' run sticky tires I would just run you stuff unitl it breaks. you may get a ton of use out of what you have.
 

96WhiteNight

New Member
May 11, 2004
303
0
0
Carlisle, PA
Jul 8, 2005
#13
  • Jul 8, 2005
  • #13
Unless your at the track every weekend launching the car 4000 rpm just use the stock.
 

Dark Knight GT

I can't get it up......ok that didn't sound right.
May 26, 2003
3,653
2
56
Ozark, Missouri
Jul 8, 2005
#14
  • Jul 8, 2005
  • #14
As the guys above have said, 31 spline differential and axle setup only offers added strength. However, its not a bad idea if you can afford it. When I swapped my rear end gears from the stock 3.27's to 4.30's, I went on ahead, and upgraded to a 31 spline assembly. No sense in doing a good job twice. Not that I "need" the added strength but, it is better to be safe than sorry. If you plan on doing this, expect to spend around 500-600 dollars for a decent setup. It will work great for the street and the track. As also stated above, you can not mate a 28 spline axles or differential with a 31 spline differential or 31 spline axles. Both must match is spline number

Let us know if you have any other questions.
 
M

myanarchy

New Member
Jun 19, 2005
15
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0
Jul 8, 2005
#15
  • Jul 8, 2005
  • #15
Why not just snag the posi out of a late model explorer, with the 4.10s and set them up in your housing. Could probably be had VERY cheaply from a jeep owner swapping the 8.8 into a TJ or YJ, and wanting to go to a full locker and deeper gears. I've seen several low mileage carriers and gears for around $50 bucks, and I believe its what 2 pass. side 31 spline exploder axle needed for the stang? If not the dutchmans or the mosers couldn't be more than $250
 

Modular2v

Founding Member
Jun 30, 2002
3,222
23
99
oklahoma
Jul 8, 2005
#16
  • Jul 8, 2005
  • #16
the trac locs on the explorer has weak clutches that wont stand up to burnouts and hard lauches...thats why people opt for the eatons and auburns.
 

east_sidaz40

New Member
May 14, 2005
189
0
0
Jul 8, 2005
#17
  • Jul 8, 2005
  • #17
Dark Knight GT said:
As the guys above have said, 31 spline differential and axle setup only offers added strength. However, its not a bad idea if you can afford it. When I swapped my rear end gears from the stock 3.27's to 4.30's, I went on ahead, and upgraded to a 31 spline assembly. No sense in doing a good job twice. Not that I "need" the added strength but, it is better to be safe than sorry. If you plan on doing this, expect to spend around 500-600 dollars for a decent setup. It will work great for the street and the track. As also stated above, you can not mate a 28 spline axles or differential with a 31 spline differential or 31 spline axles. Both must match is spline number

Let us know if you have any other questions.
Click to expand...
nope. That answers all my questions , thank you
 

Chili

New Member
May 2, 2005
174
0
0
Euless, TX
Jul 8, 2005
#18
  • Jul 8, 2005
  • #18
east_sidaz40 said:
so your saying under street conditions, non sticky tires , non Hard launches. There is no way to mess up my rear end with the spline 31. is that right!?
Click to expand...

Under street conditions, with non-sticky tires and without hard launches, you have no need for 31 spline axles.

Personally, unless / until I go blown, I'll keep running my 28's till they break. Then again, I'm still under roadside assistance, so the tow is free..

I do agree that if you're changing the gears and have the extra $600 lying around (on top of the $150 for the gears and ?? for installation) then yeah, put them on at the same time.
 
M

myanarchy

New Member
Jun 19, 2005
15
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0
Jul 8, 2005
#19
  • Jul 8, 2005
  • #19
Modular2v said:
the trac locs on the explorer has weak clutches that wont stand up to burnouts and hard lauches...thats why people opt for the eatons and auburns.
Click to expand...



Funny I've seen them pounded on with 38s and they did great
 
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