Strongest 10 bolt ratio?
Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 61
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Strongest 10 bolt ratio? What's the toughest ratio (in theory, regardless of manufacturer)? What usally lets go on the 10 bolts?
The stock torsen will be replaced with a TR2, and the axles will be replaced with Moser's. So it'll all basically be new.
I won't be doing any drag racing, auto-x only and on street tires only. Car is an M6.
The lower the number of gears on the ring gear, the stonger it should be right? What about the pinion? Is it the smaller the diameter of the pinion, the stronger, or the opposite?
The stock torsen will be replaced with a TR2, and the axles will be replaced with Moser's. So it'll all basically be new.
I won't be doing any drag racing, auto-x only and on street tires only. Car is an M6.
The lower the number of gears on the ring gear, the stonger it should be right? What about the pinion? Is it the smaller the diameter of the pinion, the stronger, or the opposite?
2.78 i think it is, i've never heard of one of those breaking, but that might be because no really modified car is still running them...you're trying to fix a bigger problem with a piece of duct tape!
For road racing 3.23-3.42 work well...
For road racing 3.23-3.42 work well...
Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 61
Likes: 0
A TR2 is circuit racing/auto-x type torsen diff.
Well the ring gear is going to be 7.625" in diameter no matter what, so having a less gear teeth means the teeth should be stronger.
I don't think I'm trying to fix a major problem with duct tape
I won't be doing any drag racing, and I'll always be running street tires, so it shouldn't be too big of a problem. Axle hop shouldn't be a problem, I will be spending a pretty penny on the rear ends suspension.
Well the ring gear is going to be 7.625" in diameter no matter what, so having a less gear teeth means the teeth should be stronger.
I don't think I'm trying to fix a major problem with duct tape
I won't be doing any drag racing, and I'll always be running street tires, so it shouldn't be too big of a problem. Axle hop shouldn't be a problem, I will be spending a pretty penny on the rear ends suspension.
Less gear teeth have little effect really. For instance- a 4.11 can be 37-9 and a 3.42 can be 41-12, but the 3.42 will usually live longer. Most of the time if you have more you get more contact surface. The real difference is the size of the pinion (gets smaller as the gear gets shorter-4.10), and that the numerically higher gears multiply more torque.
The toughest ratio would be the tallest you could get- 2.56's are easy to find but you wouldnt really want them. 3.73's are a good compromise but are borderline.
The toughest ratio would be the tallest you could get- 2.56's are easy to find but you wouldnt really want them. 3.73's are a good compromise but are borderline.
Originally Posted by 2002_Z28_Six_Speed
The part I have usualy seen break is the pinnion and the ratio with the least teeth on the pinnion means the largest teeth and least breakage.
Is this correct?
Is this correct?
Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 61
Likes: 0
Originally Posted by mzoomora
Less gear teeth have little effect really. For instance- a 4.11 can be 37-9 and a 3.42 can be 41-12, but the 3.42 will usually live longer. Most of the time if you have more you get more contact surface. The real difference is the size of the pinion (gets smaller as the gear gets shorter-4.10), and that the numerically higher gears multiply more torque.
The toughest ratio would be the tallest you could get- 2.56's are easy to find but you wouldnt really want them. 3.73's are a good compromise but are borderline.
The toughest ratio would be the tallest you could get- 2.56's are easy to find but you wouldnt really want them. 3.73's are a good compromise but are borderline.
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It is ratio more than anything else.
As far as contact, that is debated. Some people say that a 4.11 (37-9) is stronger than a 4.10(41-10) and vice-versa. I personally would rather have the 4.10 since it has more teeth and should have more contact area, which means it distribute the power better to the ring gear. Some others would say the thicker teeth of the 4.11 are better, either way it is marginal and the ratio itself is the main factor, material being equal.
As far as contact, that is debated. Some people say that a 4.11 (37-9) is stronger than a 4.10(41-10) and vice-versa. I personally would rather have the 4.10 since it has more teeth and should have more contact area, which means it distribute the power better to the ring gear. Some others would say the thicker teeth of the 4.11 are better, either way it is marginal and the ratio itself is the main factor, material being equal.
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buy some "micronited" 3.42's.... stronger and the key thing less friction to help keep the temps down since you will be road racing not to mention a little more power to the ground so they say.
TECH Apprentice
Joined: Jan 2005
Posts: 388
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From: Norfolk, VA
The Diff is actually a T2R. and 2.73 is the strongest gear ratio, but you don't really want that low (numerically).
A stock torsen really sucks on auto-x.
Kumho MX's are a really nice set of street/auto-x tires.
A stock torsen really sucks on auto-x.
Kumho MX's are a really nice set of street/auto-x tires.
Thread Starter
Staging Lane
Joined: Oct 2006
Posts: 61
Likes: 0
Originally Posted by Zepher
The Diff is actually a T2R. and 2.73 is the strongest gear ratio, but you don't really want that low (numerically).
A stock torsen really sucks on auto-x.
Kumho MX's are a really nice set of street/auto-x tires.
A stock torsen really sucks on auto-x.
Kumho MX's are a really nice set of street/auto-x tires.
So, the 2.73's have fairly large teeth and the most teeth on the pinion (15) of the popular combo's, so that means its got more teeth contacting the ring gear at the same time.
So for a 10 bolt to live get the ratio in your range with the least amount of teeth on the ring gear, and the most on the pinion gear. Then have it mirconited, and installed by a seasoned proffesional. Don't forget to replace the torsen, axles and get a diff. cover...man these 10 bolts can get expensive
