Best rear for f-body
10-08-2005, 03:49 PM
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Best rear for f-body Im looking to get the best possible rear-end for my 99 f-body. Cost is not a factor i will spend what it takes to make this thing bullit proof. I dont want a spool howver since it is driven on the road occasionally. a 9" will be the way to go however who makes the best one for our cars?
Thanks,
Joe
Thanks,
Joe
10-08-2005, 05:23 PM
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Ok here ya go.
Strange 12 Bolt-
Better bolt in rear over the Moser
Quieter than the Moser
Weaker than the Moser
Moser 12 Bolt
Stronger then Strange
Not a quiet stock like rear
Leaks a little bit
IMO get the Moser 12 Bolt with the 30 Spline Posi. No one has broken a 30 spline axle in a f body that i know of. And the 33 spline posi is just a resplined 30 spline posi unt, making it the weak point. Many 33 spline posi units have gone bad. Not reason for a 9" unless its an all out drag car.
Strange 12 Bolt-
Better bolt in rear over the Moser
Quieter than the Moser
Weaker than the Moser
Moser 12 Bolt
Stronger then Strange
Not a quiet stock like rear
Leaks a little bit
IMO get the Moser 12 Bolt with the 30 Spline Posi. No one has broken a 30 spline axle in a f body that i know of. And the 33 spline posi is just a resplined 30 spline posi unt, making it the weak point. Many 33 spline posi units have gone bad. Not reason for a 9" unless its an all out drag car.
10-09-2005, 08:22 AM
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Originally Posted by Order 66
Ok here ya go.
Strange 12 Bolt-
Better bolt in rear over the Moser
Quieter than the Moser
Weaker than the Moser
Moser 12 Bolt
Stronger then Strange
Not a quiet stock like rear
Leaks a little bit
IMO get the Moser 12 Bolt with the 30 Spline Posi. No one has broken a 30 spline axle in a f body that i know of. And the 33 spline posi is just a resplined 30 spline posi unt, making it the weak point. Many 33 spline posi units have gone bad. Not reason for a 9" unless its an all out drag car.
Strange 12 Bolt-
Better bolt in rear over the Moser
Quieter than the Moser
Weaker than the Moser
Moser 12 Bolt
Stronger then Strange
Not a quiet stock like rear
Leaks a little bit
IMO get the Moser 12 Bolt with the 30 Spline Posi. No one has broken a 30 spline axle in a f body that i know of. And the 33 spline posi is just a resplined 30 spline posi unt, making it the weak point. Many 33 spline posi units have gone bad. Not reason for a 9" unless its an all out drag car.
10-09-2005, 08:55 AM
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I've broken a 31 spline moser axle leaving @ 6800 RPM with a 3800# raceweight. I cannot tell you how many spider gears in posi's I've broken as well.
If you want a "bulletproof" setup a 9" with a spool would be the best, however not that street "turn" friendly. Many people are successfully running tru-trac style soft lockers and like them a lot so that would be the 2nd recommendation for street car.
I've ridden in many 12 bolt cars and after they take them to the track they wine like crazy.
My .02 cents.
If you want a "bulletproof" setup a 9" with a spool would be the best, however not that street "turn" friendly. Many people are successfully running tru-trac style soft lockers and like them a lot so that would be the 2nd recommendation for street car.
I've ridden in many 12 bolt cars and after they take them to the track they wine like crazy.
My .02 cents.
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10-09-2005, 08:18 PM
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Originally Posted by TRex
I'm curious, why do you think the Strange is weaker than the Moser? Also, why would you recommend 30 splines instead of 31 splines ? Or even 33 ? And the other statements you made, why ? Is there an design problem or a manufacturing problem ?
10-09-2005, 09:23 PM
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Originally Posted by Order 66
I have seen guys with strange rear break with high HP. I dont recomend anything larger than a 30 spline axles. The weak link is not the axle. A 30 spline axle can handle about 95% of the f bodys out there. The reason why i dont recomend the 33 spline is because its heavier and dont need it. On top of that they use the same posi unit as the 30 spline posi unit. Just resplined which makes the posi unit weaker.
Here is a fact, 33 spline axles are stronger than 30 or 31 spline axles. 33 spline axles can be gun drilled, if you have the $$, bringing the rotating weight down below that of a 31 spline with equivalent strength.
I don't believe one rear breaks more than the other because they are better, however there are design differences which could make one better than the other.
The Strange uses through bolts for the TA mount, the Moser uses threaded holes. Several people have had bolts snap off in the Moser bolt holes, causing them to be a PITA to get out. I would prefer a through bolt myself. I'm running stainless bolts and nuts just because I hate corrosion.
Aside from that I don't think there would be any "design" differences that woudl result in differences in strength or noise. Now, they have both demonstrated that they have QC problems with respect to units being noisy or failing. This usually comes down to improper assembly. Better to do it yourself to make sure it is right, or have a local shop do it that you can take it back to if there is a problem.
As far as the leaks, properly set up and assembled rear should not leak, period !
10-09-2005, 09:24 PM
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Originally Posted by Order 66
I have seen guys with strange rear break with high HP. I dont recomend anything larger than a 30 spline axles. The weak link is not the axle. A 30 spline axle can handle about 95% of the f bodys out there. The reason why i dont recomend the 33 spline is because its heavier and dont need it. On top of that they use the same posi unit as the 30 spline posi unit. Just resplined which makes the posi unit weaker.
A 33 spline axle is not heavier than a 30 spline axle. When you break a 31 spline axle you will know why people run a 33+ spline.
10-09-2005, 09:59 PM
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Its not an axle thing. Moser uses the same eaton posi for the 30 and 33 spline axles. They just repline the posi unit to accomodate the 33 spline axle. The resplining of the posi is the weak point. Sorry if i didnt make that clearer in my previous post.
I would not recomend a gun drilled axle on the street though.
I would not recomend a gun drilled axle on the street though.
10-09-2005, 10:10 PM
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Originally Posted by Order 66
Its not an axle thing. Moser uses the same eaton posi for the 30 and 33 spline axles. They just repline the posi unit to accomodate the 33 spline axle. The resplining of the posi is the weak point. Sorry if i didnt make that clearer in my previous post.
I would not recomend a gun drilled axle on the street though.
I would not recomend a gun drilled axle on the street though.
And what is wrong with a gun drilled axle ?
10-10-2005, 01:36 AM
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Call Driveline Solutions, the best in the business for a cost effective rearend for these cars. Get a 9" with a either spool or truetrac depending on your intention and you'll never worry again.
