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9in rear question

This is a discussion on 9in rear question within the General Help forums, part of the LSx Technical Help Section category; getting ready to buy a rear an have something that id like answered be4 i drope all this money..... #1. ...

  1. #1
    sick & twisted SS 02_slp_ss's Avatar
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    9in rear question

    getting ready to buy a rear an have something that id like answered be4 i drope all this money.....

    #1. 3-4 channle abs, what do i need or do i need it at all. the car is an 02 6spd DOES NOT have t/c

    #2. lockers, witch is a good 1, its going to see some track time but like to drive it around to.

    #3. u joints, what kinda to get, an also drive lines, will stock hold up?

    i no theres more so if there is anymore u guys want to throw in feel free

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    Moderator 35th-ANV-SS's Avatar
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    I personally would not want to drive a locker on the street a majority of the time.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I personally would not want to drive a locker on the street a majority of the time.
    its not my dd or anything, just take it to the beach every now an then an i dont drive it in the rain

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    Moderator Firebirdjones's Avatar
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    It's up to you. I prefer clutch style posi units, much more friendly on the street, and the stouter ones work well at the track too.
    If you want a locker and don't mind the noise or wet weather driving it'll work well for ya.

    You'll have to choose your axle spline, and again this will dictate the style of locker or clutch style unit you use. Honestly anything over 33 spline for even a decent track car is overkill, as they hold something like 1500 foot lbs. each. Going bigger just takes more HP to turn them.
    I find even the aftermarket 30-31 spline stuff is strong enough even for a 10 second 4,000 lbs. car. Up to you.

    I'd go with 1350 series U-joints, At the same time I'd have a driveshaft made so you don't have to use a hokey adapter joint. That's just creating another weak link.
    The stock aluminum shaft won't take alot of abuse anyway.

    If you don't have TCS then the 3 channel will do the job.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    It's up to you. I prefer clutch style posi units, much more friendly on the street, and the stouter ones work well at the track too.
    If you want a locker and don't mind the noise or wet weather driving it'll work well for ya.

    You'll have to choose your axle spline, and again this will dictate the style of locker or clutch style unit you use. Honestly anything over 33 spline for even a decent track car is overkill, as they hold something like 1500 foot lbs. each. Going bigger just takes more HP to turn them.
    I find even the aftermarket 30-31 spline stuff is strong enough even for a 10 second 4,000 lbs. car. Up to you.

    I'd go with 1350 series U-joints, At the same time I'd have a driveshaft made so you don't have to use a hokey adapter joint. That's just creating another weak link.
    The stock aluminum shaft won't take alot of abuse anyway.

    If you don't have TCS then the 3 channel will do the job.
    hey thanks man for all the info!! what drive line would u choise, i seen a couple 3.5 aluminum will they take the stress? i want to get in to the mid 11s an not have to worry about bring a trailer to the track with me.....

    an the axles i was just going to go with the 31 with a eaton an 4.11 i want to let the clutch drope at 5k an hold on, i no the clutch will take it an the tranny i just rebuilt it with all new goodies from trick shift the 10 bolt is whats holding me back now..... last pass at the track at the end of the year was a 12.78@ 118mph...... 60ft 2.83 very sad i no lol

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    Moderator 35th-ANV-SS's Avatar
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    I have the PST 3.5" AL driveshaft and that thing is a monster. I also have the 9" with a 4.11 and the trutrac.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I have the PST 3.5" AL driveshaft and that thing is a monster. I also have the 9" with a 4.11 and the trutrac.
    how u like that set up?

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    Moderator 35th-ANV-SS's Avatar
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    Quote Originally Posted by 02_slp_ss View Post
    how u like that set up?
    I have yet to put it to the test with slicks at the track, but with my Nitto DRs on the street it pulls very hard and I stick through all gears.

    I had some problems with the Moser and the right-side rear axle seal leaking, but I eventually got that taken care of after replacing it 3 times!!!

    No issues since. I installed it last summer and have put about 5K miles on it since the install.

    It's relatively quiet for being an aftermarket rear.

    I also got the 31 spline axles, kept my ABS, and got the relocation brackets for the LCA's welded onto the axle housing. The sway bar barely clears the larger center section so you may want to look into getting the sway bar brackets which relocates the sway bar to add more clearance if you plan on keeping the stock sway bar.
    It's on jackstands.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by 35th-ANV-SS View Post
    I have yet to put it to the test with slicks at the track, but with my Nitto DRs on the street it pulls very hard and I stick through all gears.

    I had some problems with the Moser and the right-side rear axle seal leaking, but I eventually got that taken care of after replacing it 3 times!!!

    No issues since. I installed it last summer and have put about 5K miles on it since the install.

    It's relatively quiet for being an aftermarket rear.

    I also got the 31 spline axles, kept my ABS, and got the relocation brackets for the LCA's welded onto the axle housing. The sway bar barely clears the larger center section so you may want to look into getting the sway bar brackets which relocates the sway bar to add more clearance if you plan on keeping the stock sway bar.
    i dont have the stock 1 on anymore i got the umi drag sway bar on it, i got there tunnel mount tq arm reloaction brackets, control arms.... all the goodies lol

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    Member Rk ws6's Avatar
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    i gotta locker and would never go any different 300+ passes on mine so far and doesnt make a noise just gotta get used to driving it.

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    sick & twisted SS 02_slp_ss's Avatar
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    Quote Originally Posted by Rk ws6 View Post
    i gotta locker and would never go any different 300+ passes on mine so far and doesnt make a noise just gotta get used to driving it.
    i seen u down there many times runing, your cars pretty mean man

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