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Old 08-25-2009   #1 (permalink)
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Default 28 or 31 spline?

hey guys, had a question. would i be ok to stay 28 spline if i got some aftermarket axles? i will have a mild 347 with some 275 drag radials. im going to be gearing my car to 3.73 and hope i can just put some moser 28 spline axles and rebuild the trac-lok and be good. any suggestions??
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Old 08-25-2009   #2 (permalink)
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You will be fine!
As long as you replace the stock ones with moser or strange you will be good to go. I know because I had built my stock 8.8 with strange 4 lug axles with c clip eliminators and even had the stock ford trac loc in it with ford racing 373 gears in it and a TA girdle. I was pushing 600 + HP through it no problem on M/T ET streets. It never failed me but now since I will be pushing 1000 HP I felt it would be a good idea to put a 9" in it. But yeah don't sweat it you should be good to go!
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Old 08-25-2009   #3 (permalink)
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By the way I wish I had known because I just sold my entire rear end for $400.00 today!!!!!
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Old 08-26-2009   #4 (permalink)
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Quote:
Originally Posted by jsusisaliv View Post
It never failed me but now since I will be pushing 1000 HP I felt it would be a good idea to put a 9" in it. But yeah don't sweat it you should be good to go!
With the right components a 8.8 will support a 1000HP

the only real advantage is the ability to setup different pumpkins

so gear changes can be made at the track.....
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Old 08-26-2009   #5 (permalink)
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Yeah I have heard that they can. Isint it funny how you see ford rear ends in about every chevy car that has any serious HP...............
I just wanted the security that the 9" offers since it is basicly bullet proof. As of now everything on my car is toned down, I can put a larger pulley on my S/C and make 1200 HP or better so I know in the future when I get used to the 1000 Hp I may want to step it up a bit, who knows I just went over board on everything I did to the car strength wise to support what I throw to it when I feel the need but yes I agree a 8.8 is strong as hell!!!
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Old 08-26-2009   #6 (permalink)
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I just went over board on everything I did to the car strength wise to support what I throw to it when I feel the need but yes I agree a 8.8 is strong as hell!!!
Yes i too can be accused of over building.....

You know by having the 9" you most likely will never need another rear......

The main point i was making was that a 8.8 will handle more power than average guy will ever make......

Trust me if i ever granade my 8.8 it will be replaced with a 9"....
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Old 08-26-2009   #7 (permalink)
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i've broke far more 9'' rears then 8.8.......they both have weak points.
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Old 08-30-2009   #8 (permalink)
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i've broke far more 9'' rears then 8.8.......they both have weak points.

Must have had some real lemon 9" rear ends if you broke more than 8.8's Agreed both can break but to break FAR more 9" rear ends than 8.8's is kinda odd to say the least. How many rear ends have you broke?
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Old 08-31-2009   #9 (permalink)
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5 9'' rears in 4 years on my bronco.

the 9'' weak link is the houseing, it will flex and you tend to break the main caps. a weld on gusett is the fix but all in all the 8.8 is not much weaker then a 9''.
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Old 08-31-2009   #10 (permalink)
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Quote:
Originally Posted by wayne94mustang View Post
5 9'' rears in 4 years on my bronco.

the 9'' weak link is the houseing, it will flex and you tend to break the main caps. a weld on gusett is the fix but all in all the 8.8 is not much weaker then a 9''.
There is not only one 9" ford rear but there is only one 9" rear end even worth fooling with, You must purchase the 9" with a nodular housing. From what you are telling me you broke 4 of them and they are not much stronger, you must have had a standard case because the difference between my old 8.8 case and the 9" case is night and day for it is the nodular case. The 9" nodular housing can take tremendous horsepower and there is not even a argument that it is much stronger then the 8.8. The 8.8 is very strong but a nodular 9" is bullet proof but yes still breakable! The standard 9" is not much stronger than a 8.8.
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Old 09-01-2009   #11 (permalink)
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Quote:
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There is not only one 9" ford rear but there is only one 9" rear end even worth fooling with, You must purchase the 9" with a nodular housing. From what you are telling me you broke 4 of them and they are not much stronger, you must have had a standard case because the difference between my old 8.8 case and the 9" case is night and day for it is the nodular case. The 9" nodular housing can take tremendous horsepower and there is not even a argument that it is much stronger then the 8.8. The 8.8 is very strong but a nodular 9" is bullet proof but yes still breakable! The standard 9" is not much stronger than a 8.8.

right but i thought we were talking stock for stock....beef up anything and it will be stronger......that being said now that my houseing is not flexing i stoped breaking main caps.

and by houseing i don't mean the center section, i mean the houseing.
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94 gt aode baumannator,pi stallion 3000 stall,transgo,mega bite jrs,3.90 gears,31 spine moser axles,comp exteme,1.7 roller rockers,190 pump,mac cold air,ford 1 5/8 unequals, off road h,flowmaster 2 chamber with stainless tails,msd box,PIH(a9p computer ajustable fan controler),q1a k-member,kenny brown frame ties,driveshaft loop,air pump eliminator kit,bbk 70mm tb,pro-m bullit meter,24#injecters,ported heads&intake,and all the little bolt ons.
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Old 09-01-2009   #12 (permalink)
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275 dr's I would go w/ 31 spline.
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Old 09-01-2009   #13 (permalink)
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Quote:
Originally Posted by wayne94mustang View Post
right but i thought we were talking stock for stock....beef up anything and it will be stronger......that being said now that my houseing is not flexing i stoped breaking main caps.

and by houseing i don't mean the center section, i mean the houseing.

They never put a stock 9" rear in a mustang as far as I know but I could be wrong?
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Old 09-01-2009   #14 (permalink)
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275 dr's I would go w/ 31 spline.


I am telling you I done it! I had 28 spline strange axles on a 8.8 stock rear with a TA girdle pushing 600 plus HP to them on MT 275 DR's and never gave an issue. I actually called strange and they said the axles I purchased were good for up to 800 HP and they were 4 lug! Trust me my car is a stick shift and was making easy 600 HP probably more so from my experience 28 spline for what you are doing is plenty!! BUt it never hurts to go bigger if he has the $$$ From what he says he is on limited funds and wants to use his stock components and throw some axles on it. So that been said that is why I said use the 28 spline.
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Old 09-02-2009   #15 (permalink)
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I haven't gone through pricing yet but some say that just slapping in a beefy 9 in can cost close to building up a beefy 8.8 ... guess I'll have to price some things out first though to throw around those claims
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