rear end might die soon
10-17-2009, 05:10 PM
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rear end might die soon So i was having a little too much fun and shift pretty hard into 3rd from second under WOT and now i hear a whine when accelerating in gear.
i was wondering if any one can confirm that it is my rear end or give any possiblities for the sudden whine.
If it is the rear end would i still be able to drive around for a while while babying it and not accelerating hard or should i not drive it tilli get it fixed?
Thank You
i was wondering if any one can confirm that it is my rear end or give any possiblities for the sudden whine.
If it is the rear end would i still be able to drive around for a while while babying it and not accelerating hard or should i not drive it tilli get it fixed?
Thank You
10-18-2009, 07:04 AM
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Happened to me too. My pinion nut had backed out a little, so I retightened it. Mine whines loud on the freeway now, so I stay on the city streets and take it easy til my new rear comes in.
10-19-2009, 03:21 AM
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So i was having a little too much fun and shift pretty hard into 3rd from second under WOT and now i hear a whine when accelerating in gear.
i was wondering if any one can confirm that it is my rear end or give any possiblities for the sudden whine.
If it is the rear end would i still be able to drive around for a while while babying it and not accelerating hard or should i not drive it tilli get it fixed?
Thank You
i was wondering if any one can confirm that it is my rear end or give any possiblities for the sudden whine.
If it is the rear end would i still be able to drive around for a while while babying it and not accelerating hard or should i not drive it tilli get it fixed?
Thank You
10-20-2009, 01:33 PM
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So ive read the stickys about rear ends but im still kind of lost on where to begin choosing a new rear end for my car.
I want to up grade to a stronger rear end but im not sure what the differences are betweeen 12 bolts or 9 in rears, or what brands are reliable.
If someone could send me in the right direction, and a rough estimate on how much it would cost, i would really appreciate it.
Thank You
I want to up grade to a stronger rear end but im not sure what the differences are betweeen 12 bolts or 9 in rears, or what brands are reliable.
If someone could send me in the right direction, and a rough estimate on how much it would cost, i would really appreciate it.
Thank You
10-20-2009, 04:27 PM
#5
Generally speaking, a 9 inch will be stronger than a 12 bolt but heavier and therefore will have more parasitic drivetrain loss. Moser and Strange are the two big names for the 12 bolt, and I'm sure there are various places to get a 9 inch or Dana 60. Midwest Chassis seems to make a very good fabricated 9 inch for the F-body.
10-21-2009, 08:00 PM
#6
So ive read the stickys about rear ends but im still kind of lost on where to begin choosing a new rear end for my car.
I want to up grade to a stronger rear end but im not sure what the differences are betweeen 12 bolts or 9 in rears, or what brands are reliable.
If someone could send me in the right direction, and a rough estimate on how much it would cost, i would really appreciate it.
Thank You
I want to up grade to a stronger rear end but im not sure what the differences are betweeen 12 bolts or 9 in rears, or what brands are reliable.
If someone could send me in the right direction, and a rough estimate on how much it would cost, i would really appreciate it.
Thank You
From my personal experience, don't buy a Moser. Go with Midwest of Strange.
You can look to spend around $2500. You can do it for less, and you can always spend more, but that's probably a good ballpark, assuming you actually put the rear in yourself.
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10-22-2009, 04:08 AM
#8
Put a 12 bolt into a early Chevelle, Nova, Camaro, etc and you can beat the crap out of it, and not hurt anything. Put one into one of our cars with a torque arm, make a couple 4000 to 5000 dragstrip launches, and I can just about guarantee you'll pick up gear noise. If it is a drag only car, you'll never know or care about the gear noise. Drive your car home from the track, and the noise will drive you nuts. I feel the torque arm stresses the 12 bolt housing, causing distortion. We have never seen this happen with the 9 inch housing.
Exotic Performance Plus strongly recommends the Moser nine inch. This rear is even tougher than the Moser 12 bolt, and the horsepower of the late model F Body cars keeps escalating every year, which requires a very strong rear. With the recent introduction of the 6.2L GM aluminum block and the excellent flowing 6.2 litre heads, the horsepower of these cars is going to just keep climbing at a very fast pace.The nine inch will handle the power, plus we prefer the way the torque arm is bolted to the nine inch in the same way the oem rear-end is attached. (This is the only good thing about the stock 10 bolt...) The Moser 12 bolt uses four short bolts to attach the torque arm, and they have a habit of loosening up, even when loc-tite is used. Why the nine inch is stronger than the 12 bolt. The 9-inch has an internal rear-pinion support that also supports the gear end of the pinion to limit gear deflection under high torque loads. This seems to be the major reason why the 9 inch doesn't start whining after high rpm clutch dumps, when the 12 bolt will pick up noise.The 9-inch locates its pinion gear lower on the ring gear to improve tooth contact, than the 12 bolt does.The 9-inch has a 0.125-inch larger ring-gear diameter and internal pinion support than the 12 bolt does. This is not much of a difference, but it is worth noting.
http://www.exoticperformanceplus.com....html?item=145
Link to the Moser 9 inch rear. Bob
Exotic Performance Plus strongly recommends the Moser nine inch. This rear is even tougher than the Moser 12 bolt, and the horsepower of the late model F Body cars keeps escalating every year, which requires a very strong rear. With the recent introduction of the 6.2L GM aluminum block and the excellent flowing 6.2 litre heads, the horsepower of these cars is going to just keep climbing at a very fast pace.The nine inch will handle the power, plus we prefer the way the torque arm is bolted to the nine inch in the same way the oem rear-end is attached. (This is the only good thing about the stock 10 bolt...) The Moser 12 bolt uses four short bolts to attach the torque arm, and they have a habit of loosening up, even when loc-tite is used. Why the nine inch is stronger than the 12 bolt. The 9-inch has an internal rear-pinion support that also supports the gear end of the pinion to limit gear deflection under high torque loads. This seems to be the major reason why the 9 inch doesn't start whining after high rpm clutch dumps, when the 12 bolt will pick up noise.The 9-inch locates its pinion gear lower on the ring gear to improve tooth contact, than the 12 bolt does.The 9-inch has a 0.125-inch larger ring-gear diameter and internal pinion support than the 12 bolt does. This is not much of a difference, but it is worth noting.
http://www.exoticperformanceplus.com....html?item=145
Link to the Moser 9 inch rear. Bob
10-22-2009, 01:23 PM
#9
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so if im looking to have a street car that can see 10s or low 11s on the strip, i should really look into a 9 inch? or would a 12 bolt be strong enough? im just wondering because i heard the 12 bolt is lighter.
10-22-2009, 01:55 PM
#10
My Camaro has an M9 in it, you can see it here. Bob
10-27-2009, 02:21 AM
#11
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Wow! what did you break coming down from that wheelie? your neck? haha. i think im sold on the 9 inch. ive never replaced a rear end before tho. any "how to"s on how to install these rear ends? not something im doing real soon but in the future for sure.
10-27-2009, 04:07 AM
#12
Lou Santaigo, formerly of MuscleCar TV with our Driver, Ted Garvin.
