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9" Rear End Really A Must?

This is a discussion on 9" Rear End Really A Must? within the Firebird / WS6 forums, part of the Vehicle Specific category; Okay from what I've read, the stock gears are weak. Everyone on here says go with a new 9" rear ...

  1. #1
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    Navy Blue
    1999 Trans Am

    9" Rear End Really A Must?

    Okay from what I've read, the stock gears are weak. Everyone on here says go with a new 9" rear end. But I've found some articles on the net about replacing the stock gears with a stronger brand...I'm not taking my ride to the track and I'm not pushing 500 hp so should I be okay with a new set of Yukon 4:10s?

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    Member Pickle86's Avatar
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    Navy Blue Metallic
    2000 Trans am ws6

    Quote Originally Posted by navyLS1 View Post
    Okay from what I've read, the stock gears are weak. Everyone on here says go with a new 9" rear end. But I've found some articles on the net about replacing the stock gears with a stronger brand...I'm not taking my ride to the track and I'm not pushing 500 hp so should I be okay with a new set of Yukon 4:10s?
    those rear ends are like 2-3 thousand. and its only for people who race a lot imo. i still got my stock 10 bolt and im fine other than my posi went out but just replaced it with an auburn. and i have 3:73 you will be fine if you dont take it to the track a lot

  3. #3
    Firebird Encyclopedia 9T8W66's Avatar
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    Some last and some don't so it can be a toss up.
    The stock 10bolt can break on hard launches, powershifts and most wheelhop instances even at stock power levels (ask me how I know). Mines been howling for a year and I'm going with a 9" for peace of mind.
    Craig
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    Member zmg00camaross's Avatar
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    pewter
    2000 camaro ss

    Its not that the gears are weak, its just that the pinion and ring gear is small and cant take the torque load or shock, If the car is a auto it will last longer. But in my M6 the car lasted 3 months before the rear blew. Now has a 9inch but if your is a street car doesnt go to the track it mite last just fine

  5. #5
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    '02 WS.6 / '07 Suburban

    In addition to a 9", they also make both Danas and 12 bolts that fit F-bodies.

  6. #6
    None Shall Pass Knight's Avatar
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    If you put sticky tires on and hook on a hard launch, you are almost sure to toast something in the rear end. A good carrier will help, as these are what usually get destroyed, and the stock gears are as good as aftermarket ones strength wise - peple change them to get better acceleration or top speed. If you only run street tires you should be ok. Once you start lookin to go faster and add more hp, unfortunately the rear end is the weak link that usually breaks first.
    Last edited by Knight; 02-21-2010 at 11:14 AM.
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    Member El Toro Loco's Avatar
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    pewter
    2001 Trans AM WS6

    changing the rear is more for security purposes, if u get a 9 or a 12 bolt u just basically insure urself.

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