ok guys a poll 4.10s or 3.73s stonger
05-31-2004, 10:32 PM
#2
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Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
i would think that physically the gears would be made of the same materials. although the 4.10 would put more stress on the gear teeth due to the mechanical advantage that they are placing onto the rear end. with a larger ring gear like a 9 inch or a 12 bolt I can't see dependability being a problem though. On a 7.5 ten bolt, I would say the whole thing is a ticking time bomb under slicks and a lot of passes at the strip.
05-31-2004, 10:42 PM
#3
Virtually any time a gearset is closer to a 1:1 ratio, it will be stronger. Better tooth engagement between gears makes it so.
Which means 2.14s are stronger than 2.29s are stronger than 2.41s are stronger than 2.56s are stronger than 2.73s are stronger than 3.08s are stronger than 3.23s are stronger than 3.42s are stronger than 3.73s are stronger than 4.10s.
There are also 4.10s (10/41) and 4.11s (9/37) and the 4.10s are stronger.
And that's not all.
Which means 2.14s are stronger than 2.29s are stronger than 2.41s are stronger than 2.56s are stronger than 2.73s are stronger than 3.08s are stronger than 3.23s are stronger than 3.42s are stronger than 3.73s are stronger than 4.10s.
There are also 4.10s (10/41) and 4.11s (9/37) and the 4.10s are stronger.
And that's not all.
05-31-2004, 10:58 PM
#4
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If everything is set up right and the gears mesh correctly it would be very hard to break the ring gear or pinion gear. Something else will break first. I would say that they are pretty much the same as far as strength is concerned.
06-01-2004, 10:31 AM
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the gears should be made out of the same material , but they wil get different stress. 4.10 gears would be less likely to bust or break b/c the are easier to turn than 3.73 gears. now if you had 2.73 gears and high hp the gears or tranny would break bc its harder to turn those gears, 4.10 gears on the other hand are easy to turn, which is better for the drive train , it puts less stress on everything. so i guess the 4.10 would be stronger.
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06-01-2004, 05:08 PM
#8
Originally posted by nolanr0413
the gears should be made out of the same material , but they wil get different stress. 4.10 gears would be less likely to bust or break b/c the are easier to turn than 3.73 gears. now if you had 2.73 gears and high hp the gears or tranny would break bc its harder to turn those gears, 4.10 gears on the other hand are easy to turn, which is better for the drive train , it puts less stress on everything. so i guess the 4.10 would be stronger.
the gears should be made out of the same material , but they wil get different stress. 4.10 gears would be less likely to bust or break b/c the are easier to turn than 3.73 gears. now if you had 2.73 gears and high hp the gears or tranny would break bc its harder to turn those gears, 4.10 gears on the other hand are easy to turn, which is better for the drive train , it puts less stress on everything. so i guess the 4.10 would be stronger.
The slight leverage advantage that a 4.10 gearset has over 3.73 gears is for the pinion yoke to turn the axles, or side gears.
a 41/11 (3.73) gearset is going to have a more solid tooth mesh than a 41/10 (4.10) gearset and that's not even comparing the Motive (and others?) 4.11 gearset at 9/37, which is weaker yet.
06-01-2004, 05:32 PM
#9
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this came from the 10 bolt strength post, right? this converstaion seems pointless when I think the rear will break everything else before it breaks the gear set.
06-01-2004, 05:36 PM
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Well, everybody has an opinion (as well as something else everybody has), so here's mine.
The opinion, that is...
The higher number ratio is going to multiply the torque input of the driveshaft. I think we can all agree to that. The torque has to be reacted in several places - the wheels, then the axles, the axle tubes, etc. And, the ring gear will tend to "spread" the carrier as it resists what the pinion gear is doing to it. When this happens, the teeth contact is moved away from the root, increasing the stress on the teeth.
With the increased leverage of the pinion on the ring gear with a higher numerical ratio (assuming the wheels can provide increased resistance), this "spread" will be increased. Therefore, it is very likely that you would be more apt to "break" 4.10 gears than 3.73.
But, that doesn't mean the 3.73's are "stronger".
The opinion, that is...
The higher number ratio is going to multiply the torque input of the driveshaft. I think we can all agree to that. The torque has to be reacted in several places - the wheels, then the axles, the axle tubes, etc. And, the ring gear will tend to "spread" the carrier as it resists what the pinion gear is doing to it. When this happens, the teeth contact is moved away from the root, increasing the stress on the teeth.
With the increased leverage of the pinion on the ring gear with a higher numerical ratio (assuming the wheels can provide increased resistance), this "spread" will be increased. Therefore, it is very likely that you would be more apt to "break" 4.10 gears than 3.73.
But, that doesn't mean the 3.73's are "stronger".
06-01-2004, 06:53 PM
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Originally posted by ede
i think the big question is how are you defining "stronger". maybe you mean tensil strength, maybe you mean hardness, maybe you mean something else all together.
i think the big question is how are you defining "stronger". maybe you mean tensil strength, maybe you mean hardness, maybe you mean something else all together.
i replied in his other thread and i said everything else being identical the only difference being the gear set, that the lower numerically ratio would break before higher numbers becasue of the increased stree to get them spinning, kinda like what he said
Originally posted by xpndbl3
i would think that physically the gears would be made of the same materials. although the 4.10 would put more stress on the gear teeth due to the mechanical advantage that they are placing onto the rear end. with a larger ring gear like a 9 inch or a 12 bolt I can't see dependability being a problem though. On a 7.5 ten bolt, I would say the whole thing is a ticking time bomb under slicks and a lot of passes at the strip.
i would think that physically the gears would be made of the same materials. although the 4.10 would put more stress on the gear teeth due to the mechanical advantage that they are placing onto the rear end. with a larger ring gear like a 9 inch or a 12 bolt I can't see dependability being a problem though. On a 7.5 ten bolt, I would say the whole thing is a ticking time bomb under slicks and a lot of passes at the strip.
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