31 Spline Axles

[Bob Mathis]

I found some new Dana 31 spline axle at a very good price. No need,maybe,no need, what do you all thing?

[RubberCtyRauder]

You'll need a new 31 spline carrier too. it's a worth while upgrade IMO for boosted cars if you play hard or run it on the track.

[Bob Mathis]

I do not play hard but sometime I do like to make sure she is still got the power. I all found Ford 31 spline spider gears.

[RubberCtyRauder]

I don't believe ford makes 28 spider gears any longer..need a carrier too.. Mo's did mine when inspecting my car found the spider gears chewed up so I upgraded it.

[yjmud]

well worth it plus aftermarket carriers are cheaper for 31 splines

[Bob Mathis]

I did not think you had to change the carrier. I will just leave what I have in.

[fastblackmerc]

I may be wrong but I think all you need is 31 spline axles (reuse the ABS tone rings if needed), 31 spline spider gears and cross pin from a 31 spline rear.

[Ourobos]

^ No, you need a center section as well, as mentioned.

I'd go with one of these :

http://www.summitracing.com/parts/dtl-913a561?seid=srese1&gclid=Cj0KEQiAg7ayBRD8qqSGt-fj6uYBEiQAucjOwaU4xobp_dXGdQI2 _6WqVQqVzgk5uYKXhwRCGr_yPnwaAo es8P8HAQ

[Bob Mathis]

I am just going to leave the 28 splines in. It all works great. I don't beat on it. May change and put carbon clutch's in some day.

[MOTOWN]

If you can get them for a deal, they would make a great set of spares.

[Ourobos]

Is it a lot better deal than this, cause if so I may check em out when I upgrade :

http://www.moserengineering.com/axles/ford-axles/ford-car-axles/2003-2004-mercury-marauder.html

[Bob Mathis]

I have changed my mind. I am going to put 31 spline Ford Racing Traction LOK in and some Dana axles. With 4.10's.

[Bob Mathis]

Will I just ordered the Ford Performance Traction Lok 31 spline from LMR. Great price.

[Bob Mathis]

I missed the deal on the axles. If some one knows who has some at a good price. I got my 4.10 and the new 31 spline unit will be here today.

[sailsmen]

You will now need a pulley,tune and Drag Radials to "take advantage".

[Bob Mathis]

When I put the headers and gears in it will go to Marty for a new tune. I am not going to change the pulley. I have drag radials all ready.

[Lowndex]

^ No, you need a center section as well, as mentioned.

I'd go with one of these :

http://www.summitracing.com/parts/dtl-913a561?seid=srese1&gclid=Cj0KEQiAg7ayBRD8qqSGt-fj6uYBEiQAucjOwaU4xobp_dXGdQI2 _6WqVQqVzgk5uYKXhwRCGr_yPnwaAo es8P8HAQ

If I may suggest, this one from ADTR:

http://adtr.net/product/ford-crown-victoria/detroit-true-trac-limited-slip-differentials/

[Bob Mathis]

UPS just dropped off the gears,Traction Loc and rebuild kit for the rear end. All Ford Racing stuff. Stock pile getting bigger. Now to find some axles at a good price.:):banana:

[chief455]

UPS just dropped off the gears,Traction Loc and rebuild kit for the rear end. All Ford Racing stuff. Stock pile getting bigger. Now to find some axles at a good price.:):banana:
Yukon Gear 31 spline, come with ABS rings
https://www.yukongear.com/productdetails.aspx?ProdID=543 7

http://www.ebay.com/itm/Yukon-Gear-Axle-Rear-Axle-Shaft-21508-/191430165586#ht_1391wt_1076

search ebay or call them and ask for a deal. It worked for me :)
you will need new lug studs as well.

[Bob Mathis]

I found some from Rock Auto USA brand for 88.98 and they have the ABS ring.

[justbob]

I may be wrong but I think all you need is 31 spline axles (reuse the ABS tone rings if needed), 31 spline spider gears and cross pin from a 31 spline rear.


Correct.

^ No, you need a center section as well, as mentioned.


False. This statement just cost the OP more money for install as opposed to a SIMPLE spider swap.


Builder Of Badassery

[chief455]

I found some from Rock Auto USA brand for 88.98 and they have the ABS ring.
they are not forged, if that is what want.

[Bradley G]

You can use the spring from F-150 , maybe someone can show you the difference with pics.
It does make it tight and an extra clutch disc was not possible.

[Bob Mathis]

Just to let some know I looked into a spider gear set up and carbon clutches. The spider gears cost around $190 and that is Ford ones and the carbon clutches coat $95.00. I paid $195 for a complete unit from LMR.

[Ourobos]

Just to let some know I looked into a spider gear set up and carbon clutches. The spider gears cost around $190 and that is Ford ones and the carbon clutches coat $95.00. I paid $195 for a complete unit from LMR.


Chew on and eat that, JustBob.. ;)

[jwibbity]

Chew on and eat that, JustBob.. ;)

still doesnt change the fact you gave bad info

[Ourobos]

Replace spider gears, replace carrier.. One is totally new clutches and all, one is a patch job with old clutches.. Complete replacement is cheaper.. Think again bright eyes, it was excellent information, and the CORRECT thing to do. Unless you're swinging on someones nuts? Stop cluttering the man's thread.. He made the proper decision based on his research.

[Bob Mathis]

Come on guys. I do take what people say. I just did some looking around and I am sure anyone would have done the same. If anyone can use this information that would be great. I have about a total of $385 for the stuff.

[justbob]

Chew on and eat that, JustBob.. ;)


Chew on what? You gave INCORRECT information!

Price comparisons can not make up for lack of knowledge.

In any event, he originally just wanted a 31 spline upgrade. Good quality spider kits with pin are $99 online and new carbon clutches are $97 any day of the week. Where is the savings over paying someone to change out the diff? What was a simple axle swap turned into essentially a gear swap.

The amount of misguided "help" around here is scary.


Builder Of Badassery

[Ourobos]

Just changing the spiders is a hack job, if you're in there, do it right and do it all, don't be a slack ass.

No lack of knowledge here, a lot of arrogance on your end no doubt though.

He got the better deal, he's happy, should be end of story, yet you think your input is needed apparently.

Perhaps he's like some of us and can setup his own gears? Maybe you're not as magic or rare as you think you are?

[justbob]

Just changing the spiders is a hack job, if you're in there, do it right and do it all, don't be a slack ass.

No lack of knowledge here, a lot of arrogance on your end no doubt though.

He got the better deal, he's happy, should be end of story, yet you think your input is needed apparently.

Perhaps he's like some of us and can setup his own gears? Maybe you're not as magic or rare as you think you are?


Ummm. FYI I did my own gears.. And how is it a hack job when your replacing all replaceable parts? Never mind, I really don't want to know what you'll come up with next.

Your lack of apology to the OP for telling Jim he was incorrect and that he "needed" a new diff shows your character. Your pity insults further back that up.

Bob Mathis seems intelligent and I'm sure he understands I was merely backing up his first post. The best thing he could do is stop starting threads on here and just consult with Marty and get good solid advice and not opinions.

Carry on Bob, I'm done here.


Builder Of Badassery

[Ourobos]

Thank god you're done at least.

[chief455]

Thank god you're done at least.

Wow. Just wow.:shake:

[Bob Mathis]

"WOW" Ok here I go. First I am not going to stop posting on here. I like to see what others say. Yes I am smart enough to get where I want to go. I do talk to Marty. He is a good friend and so are others on here. But I feel some time you guy's go really to far. This was just a thread to just ask about 31 splines and that was all.

I have what I need so this thread is done.

[MOTOWN]

Thank god you're done at least.

You seriously need to check your self, and take your 100 and something post , and go elsewhere if that's your piss poor attitude towards others!

[Bob Mathis]

MOTOWN are you say these to me?

[Ourobos]

No Bob Mathis, you're good, the Nazis are on me. Good work on picking the proper parts for your upgrade.

[Bob Mathis]

One more question. What is the lenght of are axles? I see some show 34 3/8 and some show 35 and some thing.

[MOTOWN]

MOTOWN are you say these to me?

No Bob not at all, talking to another member.

[QUOTE=Ourobos;1474242]Post count doesn't mean **** Motown, get that out of here. Congratulations, you've sat your big ass in front of a computer more than me, have another cookie. I'm only giving back the poor attitude given to me, I don't care who it's from, your hero JustBob or anyone else. Go back and see where it started, or be biased either way.

Obviously you and I have never met , you sound like a total fool! And no one cares where it started (are you in elementary school?) , there is no excuse for you being a total AZZ towards another member who is only trying to learn, and upgrade his car.

Grow up , or go away!

[Ourobos]

Bob Mathis, 34.375", or 34 3/8.

I'm sure the old timers will correct me if they have a different opinion

[Bob Mathis]

Will I have order the axles Ford bearings,seals and new yoke. I all so found a rear end to build up. So I have something to do over the winter.

[1Marauder]

Bob, again, you are a wildman.... Hats off to you my friend, and enjoy the build!

[Bob Mathis]

I found two complete rear end out from under cop cars. Got them for a very good price and they are pulling them. One is for me and the other is for a friend. The only thing left is the axles and they will be here Monday.

[fastblackmerc]

I found two complete rear end out from under cop cars. Got them for a very good price and they are pulling them. One is for me and the other is for a friend. The only thing left is the axles and they will be here Monday.

If they are of recent vintage they may already have 31 spline axles.

[RubberCtyRauder]

Yep, about mid-year 2005 and up to 2011 are 31 spline from factory. If 2002 or earlier, they are wrong for the car as frame was changed in 2003

[O's Fan Rich]

Yep, about mid-year 2005 and up to 2011 are 31 spline from factory. If 2002 or earlier, they are wrong for the car as frame was changed in 2003

Correct. Just tore down a March 2005 axle assembly. 31 spline axles, 3:27 gear.... open differential.

Guess I'll have to not use the Eaton 28 spline diff I have and get a 31 spline now.

[Bob Mathis]

Got everything to build the rear end now.

[chief455]

Got everything to build the rear end now.

I'm going for a pre loved 31 spline 3.27 locking stud to stud unit from car-part.com for $250 to enhance snow driving in my LX Sport :cool:

[GreekGod]

^ No, you need a center section as well, as mentioned.

I'd go with one of these :

http://www.summitracing.com/parts/dtl-913a561?seid=srese1&gclid=Cj0KEQiAg7ayBRD8qqSGt-fj6uYBEiQAucjOwaU4xobp_dXGdQI2 _6WqVQqVzgk5uYKXhwRCGr_yPnwaAo es8P8HAQ

The Eaton Trutrac is hands down, the best differential for what you want. Any other choice is a lesser one, except for a Detroit Locker, which is probably only better for drag racing - (it's stronger, but not at all smooth)

==

[MOTOWN]

The Eaton Trutrac is hands down, the best differential for what you want. Any other choice is a lesser one, except for a Detroit Locker, which is probably only better for drag racing - (it's stronger, but not at all smooth)

==

What exactly are you basing this information off of?

[GreekGod]

What exactly are you basing this information off of?
I am biased by my personal experience of working on Fords for the last 46 years. I had a (9" version) Detroit Locker in my 1968 F100, and also have one in my current 1979 F150 4x4.

The 8.8 rear axle is a slight upgrade to the crappy and cheap GM design it copies.

I installed an Eaton Detroit Locker in my 2003 MM. It is noisy, clunks, bangs, and takes experience to get used to.

I have an 8.8" assembly with a Trutrac for my 2000 CVPI, which I have not installed yet. I went with the big 9" "Hobby Stock" ends (from Moser) on the housing, to get rid of the puny axle 8.8" ends and the bearings that ride on the axle shafts.

I wish I would have gone with the Trutrac for the MM, but at least I have the strongest differential available, and no clutches to wear out.

==

[MOTOWN]

The trutrac is a decent carrier , but it's not very strong, and can only handle marginal horsepower and torque, it's ok for a dd , but I wouldn't use it in a car with any amount of decent power.

[GreekGod]

The trutrac is a decent carrier , but it's not very strong, and can only handle marginal horsepower and torque, it's ok for a dd , but I wouldn't use it in a car with any amount of decent power.

What exactly are you basing this information off of?

==

[MOTOWN]

What exactly are you basing this information off of?

==
I had one before in a n/a car , very smooth, but the gears self destructed during a highway trip, they said i attempted to transfer too much power thru it , which was only around 375 at the wheels.

[Ourobos]

Hmm I had the Detroit Locker and Auburn LSDs, both felt just like a stock trac-loc.. But sure could handle the power when needed..

[O's Fan Rich]

What 31 spline differential would be recommended for a 5-600 rwhp full size car?
I was about to order the TrueTrac.....

[MOTOWN]

What 31 spline differential would be recommended for a 5-600 rwhp full size car?
I was about to order the TrueTrac.....

I have an Auburn pro series in my car , and it has performed flawlessly.