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12 bolt. yes or no?

This is a discussion on 12 bolt. yes or no? within the Drivetrain forums, part of the LSx Technical Help Section category; Originally Posted by jgang Newbie here....I would like to know the rules about selling a new Moser 12 bolt rearend ...

  1. #21
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by jgang View Post
    Newbie here....I would like to know the rules about selling a new Moser 12 bolt rearend on here?
    you need to post a little more here and then you can sell it...try going to the new member section and just introducing yourself

  2. #22
    Senior Member Bottesini's Avatar
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    Quote Originally Posted by dklowrider View Post
    i must be missing something here. is the output ratio of an m6 in high gear that much higher than an a4? the rpm you give at 75 is what im turning at 70 w/2.73s and 26" tires. how is that?
    Yes the M6 has a great final gear .5 overdrive, which is why they can do so well on the highway. I think his tires must be a little taller than stock since I turn 2100 at 75 with my 4.11s. Even still though the difference is not huge when you are talking about 6th gear only a few mph and a few hundred RPM difference. At the track however with 26" tall tires I trap just below my rev limiter in third for the 1/8, any more power than what I have will mean taller tires for me in the future (before 9" about 400 RWHP).

  3. #23
    Member fccs's Avatar
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    Quote Originally Posted by Jays00ss View Post
    I run 4.30's, and a Detroit locker as a daily driver in my Camaro during the nice months (April-October). Absolutely love the combo and in no way are 4.30's "Too much gear" I think they are about perfect. At 75 MPH in 6th I am at 1950 RPM.

    at the track with a 410 rwhp car with 26.5" tall tires I am at 6500 rpm in 4th. right in the sweet spot of my cam range.

    Detroit locker takes a little getting used to but I don't even notice it anymore and for an occasional pop, bang boom, Is the best "posi" you can buy, Because it's all mechanical no clutches to wear out, and practically bulletproof. Why do you think all the 4X4 owners use them.

    I haven't had any issues at all with wet road driving. Just be a little cautious and you will never even notice you have the locker.

    $1800 Is a smoking deal, set up will be just fine I wouldn't hesitate for 1 millisecond.
    Yea wait how are you at 75mph at 1950.. I have stock 3.42's and im 2000rpms at 80mph so what the fuck?

  4. #24
    Junior Member Cookie's Avatar
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    Quote Originally Posted by Bottesini View Post
    Yes the M6 has a great final gear .5 overdrive, which is why they can do so well on the highway. I think his tires must be a little taller than stock since I turn 2100 at 75 with my 4.11s. Even still though the difference is not huge when you are talking about 6th gear only a few mph and a few hundred RPM difference. At the track however with 26" tall tires I trap just below my rev limiter in third for the 1/8, any more power than what I have will mean taller tires for me in the future (before 9" about 400 RWHP).
    well if your right about the .5 overdrive (i thought it was .62) then 2100 at 75 w/4.11's is about right according to this calculator http://www.pro-system.com/calc.html

    I really thought it was .62 though? But i do remember hearing .5 somewhere else. But .5 makes sense since if you use the .62 gear in that calculator your at 2500 at 75.

  5. #25
    Senior Member Bottesini's Avatar
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    Quote Originally Posted by Cookie View Post
    well if your right about the .5 overdrive (i thought it was .62) then 2100 at 75 w/4.11's is about right according to this calculator http://www.pro-system.com/calc.html

    I really thought it was .62 though? But i do remember hearing .5 somewhere else. But .5 makes sense since if you use the .62 gear in that calculator your at 2500 at 75.
    Depends on the year apprently which ratios you have in the tranny, but for LS1 M6 they are all the same.
    http://www.khoory.com/T-56.html

  6. #26
    Junior Member Cookie's Avatar
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    wow cool. that helps me out a lot with gettin the 4.30's... i was figurin it with .62 not the .5. Wikipedia stands corrected again...

  7. #27
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by fccs View Post
    Yea wait how are you at 75mph at 1950.. I have stock 3.42's and im 2000rpms at 80mph so what the fuck?
    I thought I was at 2,000 rpms at 80 mph too with the stock 3.42's,,,stock 26 inch tall tire and the .50 overdrive 6 speed.

    I know the speedo and tach are correct, maybe my memory is fuzzy. I'll have to drive it again and see for sure.
    Last edited by Firebirdjones; 04-16-2009 at 09:01 PM.

  8. #28
    Junior Member Cookie's Avatar
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    well the fuckin jerk sold it out from under me. So im lookin now if anybody knows of one for sale...

  9. #29
    Senior Member JaycenK's Avatar
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    that sucks

  10. #30
    Junior Member Cookie's Avatar
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    yea... a lot... that thing was perfect

  11. #31
    Junior Member gyrene2003's Avatar
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    Here is a curve ball for you guys. After I do my fltlvl 4 trans install I'll be ordering a 9" and as of right now I have 3.90s and an ss4000 and I'm lookin to step it up to atleast 4.10s if not 4.30s. Just want to see how bad I'll get flammed on the forums and see if their are any A4 guys runnin such a steep gear. I don't use my car as a dd.

  12. #32
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by gyrene2003 View Post
    Here is a curve ball for you guys. After I do my fltlvl 4 trans install I'll be ordering a 9" and as of right now I have 3.90s and an ss4000 and I'm lookin to step it up to atleast 4.10s if not 4.30s. Just want to see how bad I'll get flammed on the forums and see if their are any A4 guys runnin such a steep gear. I don't use my car as a dd.
    Thats not that much gear if you ask me,,,but I come from an era where gear was king Shucks I run more gear than that behind 3 different cars and none of them even have overdrive. It's not that bad.

    With an overdrive of anykind I wouldn't even question it. There are a couple of old folks on here that run 4.56's behind the auto overdrives.

    My only complaint would be the crappy 3.06 first gear that the 4L60's have.

  13. #33
    Junior Member gyrene2003's Avatar
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    So a 4.56 then? Just jokin, but I am thinkin seriously thinkin 4.30s

  14. #34
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by gyrene2003 View Post
    So a 4.56 then? Just jokin, but I am thinkin seriously thinkin 4.30s
    It's really up to you and what you want out of the car. If you plan a large cam and spinning the motor up high enough, then it's going to like alot of gear. Tire size will play a roll as well.

  15. #35
    Junior Member gyrene2003's Avatar
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    Ok, well the cam I will be running is gonna be an f13 from futral, already have the cam just haven't put it in yet. It's a 230/232 585/595 on a 112. Should a 4.10 gear be the max? When I do the 9"

  16. #36
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by gyrene2003 View Post
    Ok, well the cam I will be running is gonna be an f13 from futral, already have the cam just haven't put it in yet. It's a 230/232 585/595 on a 112. Should a 4.10 gear be the max? When I do the 9"
    Depends what size tires you will be running.
    26' tire at the track will generally use 4:10s
    27' tire for 4:30s
    28' tire for 4:56s.


    The 28' tire will give you best traction. As for the street, 410s and 430s are both fun.

  17. #37
    Junior Member gyrene2003's Avatar
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    My post was not supposed to end like it did. I was gonna say, when I do the 9" I was gonna get some weld wheels and run a taller tire out back. As much as I would like to have a crazy ass gear like a 4.56, I would only be running the taller tire at the strip so I think a 4.30 would be the max. I need to get my trans in the car so I can stop messing around with my broken shit and run the times I should and then see where I'm at, hopefully about 12.2x, then if I hit that I might only do a 4.10 gear cause the cam I have waiting to go in will get me deep 11s.

  18. #38
    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by fccs View Post
    Yea wait how are you at 75mph at 1950.. I have stock 3.42's and im 2000rpms at 80mph so what the fuck?
    Sorry, At 75MPH I am at approx 2050 RPM. Just got back off the hiway.

  19. #39
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by Jays00ss View Post
    Sorry, At 75MPH I am at approx 2050 RPM. Just got back off the hiway.
    Yep that's probably right. I drove ours again and with my stock 3.42's and stock tires I'm at roughly 1700 at 75 mph. At 80 mph it's barely 1800.

    So FCCS that has 2000 rpm at 80 mph has a calibration problem on the speedo that someone has messed with or he has changed tire sizes around.

  20. #40
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by Firebirdjones View Post
    Yep that's probably right. I drove ours again and with my stock 3.42's and stock tires I'm at roughly 1700 at 75 mph. At 80 mph it's barely 1800.

    So FCCS that has 2000 rpm at 80 mph has a calibration problem on the speedo that someone has messed with or he has changed tire sizes around.
    im at like 2k-2100k at 75 wtf ..with 3.23s A4

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