Whats the difference between 31 spline and 28 spline??

BREEZY B · May 30th, 2008, 12:51 AM

I can't deside what I want to do I've been looking at Buying the things to build my rear end. I'm starting to wonder if going with a 31 spline diff and axles is necessary. My car probaly makes around 270 rwhp. I dont know if I should just buy the gears put them and be done with it or upgrade to 31 spline stuff. If I did upgrade to 31 spline what would I gain from it or am I just wasting my money.

DeMello · May 30th, 2008, 12:53 AM

what mods you have?

and im pretty sure the stock rear is 28...the 31 spline is alot stronger so it defintily wont hurt

G.T. Rags · May 30th, 2008, 12:55 AM

Originally Posted by E714FEVER

I can't deside what I want to do I've been looking at Buying the things to build my rear end. I'm starting to wonder if going with a 31 spline diff and axles is necessary. My car probaly makes around 270 rwhp. I dont know if I should just buy the gears put them and be done with it or upgrade to 31 spline stuff. If I did upgrade to 31 spline what would I gain from it or am I just wasting my money.

if u have the money to do the full swap, then do it. if u ever go FI, chances are ur gonna break something. I can name a few members who have snapped a rear with mino bolt on's and some spray.

do it once, do it right, and don't look back

BREEZY B · May 30th, 2008, 12:59 AM

Originally Posted by DeMello

what mods you have?

and im pretty sure the stock rear is 28...the 31 spline is alot stronger so it defintily wont hurt

BBk lt's,bbk catted x,slp lm 1's,pp plenum and 75mmtb,jlt rai,mgw short shifter,slp line lock,upr sub frame connectors, Granitelli tubular K-member and a arms, Tokico HP shocks and struts, coil over conversion kit, Weld racing 15x10 and 15x3.5 pro stars, with mt et street radials out back I probaly forgot somthing but that sums it up.

MustangMatt96GT · May 30th, 2008, 01:02 AM

on the M/Ts i would put it in. Im still on a stock rear end, and was doing 5000 RPM launches, on my ET street slicks. Never broke a thing, but i also wasnt spraying yet.

DeMello · May 30th, 2008, 01:02 AM

SLP ftw lol

wat made you go with the rai instead of cai?

BREEZY B · May 30th, 2008, 01:03 AM

Originally Posted by 96GTRagTop

if u have the money to do the full swap, then do it. if u ever go FI, chances are ur gonna break something. I can name a few members who have snapped a rear with mino bolt on's and some spray.

do it once, do it right, and don't look back

Thats what was thinking no point in just doing the gears do it all and be done with it. Fully built it is!!!

BREEZY B · May 30th, 2008, 01:05 AM

Originally Posted by DeMello

SLP ftw lol

wat made you go with the rai instead of cai?

UMMMM i just didnt like the in fender well style. And I thought the big fat tube looked cool

LOL

DeMello · May 30th, 2008, 01:05 AM

Originally Posted by E714FEVER

UMMMM i just didnt like the in fender well style. And I thought the big fat tube looked coolLOL

lol...been to the track yet?

BREEZY B · May 30th, 2008, 01:50 AM

Originally Posted by DeMello

lol...been to the track yet?

Yea once with street tire's ran a 13.078. Haven't been since I bought the pro stars and Mickey thompson tires. Just ordered a eaton diff,31 spline axle's,FRPP 4.10 gears, Bearing kit,FRPP aluminum driveshaft,31 spline yoke,axle seals and bearing's,trick flow diff cover,royal purple oil and red line friction modifier,and an SCT X cal3 tuner. There's gonna be a fun weekend project coming up.

DeMello · May 30th, 2008, 01:52 AM

danm...how much it all just cost you?

G.T. Rags · May 30th, 2008, 01:54 AM

should be good for mid 12 second pass

BREEZY B · May 30th, 2008, 01:56 AM

A pretty penny. About 1800 total. Lucky me I can do it myself and I have friends That can do it. So no big install bills for me.

DeMello · May 30th, 2008, 01:56 AM

danm...im about to be spednign like 2200 in the next 2 days

tom2000r · May 30th, 2008, 01:59 AM

guy at the track has 8.8 ,,28 spline posi,,axles,,355 gears,,runs 12.20.pulls front wheels around 4 inches. m/t,,with stick..pass after pass..302 pushrod motor...

BREEZY B · May 30th, 2008, 02:05 AM

Originally Posted by DeMello

danm...im about to be spednign like 2200 in the next 2 days

Cool on what? This is the first thing I've bought for the car this year. Except for my pro stars. I hope your paying in cold hard cash and not racking up the credit card bills! Thats bad news.

Drgnracin72 · May 30th, 2008, 02:07 AM

i say go ahead and build it with the slicks. ive seen em break with drag radials and then again ive seen guys do 6000 rpm launches on slicks with them and never have a problem, so its a roll of the dice. i say go ahead do the whole swap

DeMello · May 30th, 2008, 02:09 AM

Originally Posted by E714FEVER

Cool on what? This is the first thing I've bought for the car this year. Except for my pro stars. I hope your paying in cold hard cash and not racking up the credit card bills! Thats bad news.

x cal 3 or sct livewire?

and im paying off all 1100 bucks on a VISA i have lol (so if shit breaks i have a way to buy new parts

)

Volstang · May 31st, 2008, 08:01 PM

3

May 30th, 2008, 12:51 AM	#1
BREEZY B Regular 2011 Mustang GT 12.89@111 Join Date: May 2008 Location: Port Deposit, Maryland Posts: 174 iTrader: 3 reviews	Whats the difference between 31 spline and 28 spline?? I can't deside what I want to do I've been looking at Buying the things to build my rear end. I'm starting to wonder if going with a 31 spline diff and axles is necessary. My car probaly makes around 270 rwhp. I dont know if I should just buy the gears put them and be done with it or upgrade to 31 spline stuff. If I did upgrade to 31 spline what would I gain from it or am I just wasting my money. __________________ 2011 Mustang GT Auto Bone Stock

May 30th, 2008, 12:53 AM	#2
DeMello Banned Join Date: Apr 2008 Location: Florida Posts: 3,965 iTrader: 1 reviews	what mods you have? and im pretty sure the stock rear is 28...the 31 spline is alot stronger so it defintily wont hurt __________________ Just Another Bolt on GT [IMG]http://i45.tinypic.com/54f5ua.jpg[/IMG] Stock Longblock - 287/276 Low 12s NA! 10s on the spray?

May 30th, 2008, 01:02 AM	#5
MustangMatt96GT Proud American 1996 Mustang GT 10.76 @ 122 with d/a of 8365 ft Join Date: Dec 2006 Location: Lakewood, CO Posts: 10,171 iTrader: 3 reviews	on the M/Ts i would put it in. Im still on a stock rear end, and was doing 5000 RPM launches, on my ET street slicks. Never broke a thing, but i also wasnt spraying yet. __________________ RIP Travis Billings Special Thanks to: Andrews Racing Transmissions Baseline Suspensions Blown Small Block Ford with a hole in the block. 9.5 Dart Block 400 CI being saved for. Just because you can fuck a cactus doesn't mean you should. Never Lift Racecars

May 30th, 2008, 01:02 AM	#6
DeMello Banned Join Date: Apr 2008 Location: Florida Posts: 3,965 iTrader: 1 reviews	SLP ftw lol wat made you go with the rai instead of cai? __________________ Just Another Bolt on GT [IMG]http://i45.tinypic.com/54f5ua.jpg[/IMG] Stock Longblock - 287/276 Low 12s NA! 10s on the spray?

May 30th, 2008, 01:52 AM	#11
DeMello Banned Join Date: Apr 2008 Location: Florida Posts: 3,965 iTrader: 1 reviews	danm...how much it all just cost you? __________________ Just Another Bolt on GT [IMG]http://i45.tinypic.com/54f5ua.jpg[/IMG] Stock Longblock - 287/276 Low 12s NA! 10s on the spray?

May 30th, 2008, 01:56 AM	#13
BREEZY B Regular 2011 Mustang GT 12.89@111 Join Date: May 2008 Location: Port Deposit, Maryland Posts: 174 iTrader: 3 reviews	A pretty penny. About 1800 total. Lucky me I can do it myself and I have friends That can do it. So no big install bills for me. __________________ 2011 Mustang GT Auto Bone Stock

May 30th, 2008, 01:59 AM	#15
tom2000r Enthusiast Join Date: Jan 2008 Location: ohio Posts: 753 iTrader: 0 reviews	guy at the track has 8.8 ,,28 spline posi,,axles,,355 gears,,runs 12.20.pulls front wheels around 4 inches. m/t,,with stick..pass after pass..302 pushrod motor...

May 30th, 2008, 02:07 AM	#17
Drgnracin72 I Post Entirely Way Too Much Join Date: Jan 2006 Location: somewhere in oklahoma Posts: 10,638 iTrader: 2 reviews	i say go ahead and build it with the slicks. ive seen em break with drag radials and then again ive seen guys do 6000 rpm launches on slicks with them and never have a problem, so its a roll of the dice. i say go ahead do the whole swap __________________ RIP ΜΟΛΩΝ ΛΑΒΕ Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. One Big Ass Mistake America SHEEPDOGS

May 31st, 2008, 08:01 PM	#19
Volstang Regular 2004 Mustang GT Convert. Join Date: Jul 2007 Posts: 87 iTrader: 0 reviews	3

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