28 or 31 Spline

marine_2003

Member

Jun 6, 2005

427

0

16

Lake County, FL

Sep 11, 2005

#1

• Sep 11, 2005

• #1

Which Axles should I go to? 28 ir 31 Spline?

Thanks

 

Carney Woods

New Member

Dec 29, 2002

191

1

0

Montreal, Quebec

Sep 11, 2005

#2

• Sep 11, 2005

• #2

If it was me and this is what I did. It's pretty well the same price to upgrade to 31 splines if your changing your differential anyway. I got an explorer diff (31 splines) with 3.73 axles off ebay for 120.00. all I need is the axles so for a little more money there will be no worries in the rearend.............

 

Realmongo

I prefer to be called "Evil Genius"

Founding Member

Oct 10, 2001

2,468

86

99

Western Mass

Sep 11, 2005

#3

• Sep 11, 2005

• #3

Depends on what your differential is splined for.

 

marine_2003

Member

Jun 6, 2005

427

0

16

Lake County, FL

Sep 11, 2005

#4

• Sep 11, 2005

• #4

Im taking the rearend out of the car, and replacing everything, axles, posi, and gears. So I was wondering what spline to go with.

 

S

Sicarius428

Active Member

Jan 6, 2004

2,085

5

49

Sep 12, 2005

#5

• Sep 12, 2005

• #5

31s definately then.
Kevin

 

T

tjm73

Founding Member

Aug 3, 2000

2,418

2

48

Rush, NY

Sep 12, 2005

#6

• Sep 12, 2005

• #6

Sicarius428 said:

31s definately then.
Kevin

Click to expand...

Yeah what this guy said.

 

powertrax91

Founding Member

Mar 13, 2002

598

0

17

New York

Sep 12, 2005

#7

• Sep 12, 2005

• #7

tjm73 said:

Yeah what this guy said.

Click to expand...

 

Lyncher

New Member

Jun 14, 2005

434

0

0

Sep 12, 2005

#8

• Sep 12, 2005

• #8

powertrax91 said:

Click to expand...

y wouldnt you go with 31s?

 

CBZGT50

New Member

Apr 21, 2005

171

0

0

St Louis area

Sep 12, 2005

#9

• Sep 12, 2005

• #9

I called randy's ring and pinion to upgrade my car to 31 spline with a locker during my change to 3.73's. Here is the breakout:

Eason posi: $399.00
Two 31 spl axels $121 each
axle seals and bearings $15.20 each side
Used gears and setup kit (everything) $125.00
Setup $200.00
$996.40

I already have the gears and set up kit. So I am going to be about $850 into mine with new parts and new oil.

 

SVT32VDOHC

waiting for the next hack atta

Founding Member

Nov 22, 2001

3,501

28

119

Motor City

Sep 12, 2005

#10

• Sep 12, 2005

• #10

I went with 31 spline Mosers..and I had DTS build an Explorer 31 spling carrier..it was much cheaper. People tell me now the diff is my weak point, but really....if it breaks I can fix it 3 times and it will still be cheaper than buying any other A.M. diff once. I have been hard on the car with sticky tires and it has been find..many burnouts too.!!! 31s arethe way to go.

 

TrophyHead

15 Year Member

Mar 18, 2003

1,195

11

49

PA

Sep 12, 2005

#11

• Sep 12, 2005

• #11

Lyncher said:

y wouldnt you go with 31s?

Click to expand...

"Sometimes" upgraded 28 spline axels are all you need. I forget how much Moser 28 splines can handle but way more than stockers. Also they weigh a little less than 31's. And on rotating parts less weight is better. Hardcore road racers would consider the less weight. But I agree go with the 31's.

 

dbdragracing

Member

Dec 1, 2004

397

2

18

Sep 12, 2005

#12

• Sep 12, 2005

• #12

I know the traction lock has to be changed when going to 31-spline, but can you use the same gears you are using with the 28-spline? Thanks.

 

Lyncher

New Member

Jun 14, 2005

434

0

0

Sep 12, 2005

#13

• Sep 12, 2005

• #13

TrophyHead said:

"Sometimes" upgraded 28 spline axels are all you need. I forget how much Moser 28 splines can handle but way more than stockers. Also they weigh a little less than 31's. And on rotating parts less weight is better. Hardcore road racers would consider the less weight. But I agree go with the 31's.

Click to expand...

yeah but the weight difference can really be a noticable amount performance wise...can it? I would just think that the price isnt much diffrent and the added strength is always welcome but thats just how i see it?

 

TrophyHead

15 Year Member

Mar 18, 2003

1,195

11

49

PA

Sep 13, 2005

#14

• Sep 13, 2005

• #14

Lyncher said:

yeah but the weight difference can really be a noticable amount performance wise...can it? I would just think that the price isnt much diffrent and the added strength is always welcome but thats just how i see it?

Click to expand...

http://www.moserengineering.com/moser_interior/axletech.htm

I contacted Moser with a few questions. I'll re-post when they get back to me.

Anybody remember what the rule of thumb is when you lose one pound of rotational mass. How much HP do you gain? I forget.

 

TrophyHead

15 Year Member

Mar 18, 2003

1,195

11

49

PA

Sep 13, 2005

#15

• Sep 13, 2005

• #15

A 28 spline axel is rated at 5,000 lbs per axel. They didnt give me a weight and it's probably not much. So with 400 lbs of TQ, 3.35 first, and 4.10's your still well in check for 28 splines.

They said slicks=31 and up.

 

blackstangt

Member

May 31, 2004

460

1

19

ny

Oct 20, 2005

#16

• Oct 20, 2005

• #16

not really, i bent my 28 with less than 400 ft lbs and wide gears (2.95)x(3.08) 1st. I do have like 140k on them though, overhaul on the 8.8 this winter.

 

F

fiveohGT

New Member

Jun 22, 2004

353

1

0

Fairfax Virginia

Oct 20, 2005

#17

• Oct 20, 2005

• #17

31's deff.

 

$uperstang

New Member

Jul 20, 2004

476

1

0

Detroit, MI

Oct 20, 2005

#18

• Oct 20, 2005

• #18

31

 

R

RustyFox

New Member

Jun 29, 2004

44

0

0

Media, PA

Oct 20, 2005

#19

• Oct 20, 2005

• #19

not really, i bent my 28 with less than 400 ft lbs and wide gears (2.95)x(3.08) 1st. I do have like 140k on them though, overhaul on the 8.8 this winter.

Click to expand...

I'm assuming they were stock 28's.

Has anyone heard of anybody breaking aftermarket 28's with less than 600 hp?