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3.73's on a 10bolt?

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Old Jan 24, 2005 | 06:38 PM
  #21  
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Originally Posted by 72ChevelleConv.LS1
The gear change is not what makes the rear end weeker, its how well you hook up to the ground that puts the stress to the rear end. if you have a M6 you will not have much give between the moter and the trans. an A4 will slip some. this is safer for the rear end. Say with a M6 and a sticky set of tires, you will put a lot of strain on your rear end.
You either did not read the link I posted or did not understand it. Anytime you increase the ratio, you decrease the size of the pinion gear which in turn decreases the amount of gear contact between the ring and pinion which in turn makes it weaker. Of course the pay off may be worth the risk, but this is a fact. It is especially a concern to our stock rear ends due to the already small ring gear and consequently small pinion gear. To make this simple, here is the example: our ring gear is about 7.6" in diameter, with a 2.73 gear ratio that would equate roughly to a pinion gear of diameter of 2.78" when you switch to a 4.11 gear that will decrease to a diameter of about 1.85". Which one do you think will be stronger?
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Old Jan 25, 2005 | 01:05 AM
  #22  
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Originally Posted by TheBlurLS1
alright, my pumped up-o-meter is going off the charts about right now after reading this thread! and i'm going from 3.08's to 3.73's!!!
3.08s? How did those get in there, didn't it come with 3.42s?


Originally Posted by D3IMOS
Don't you mean 2.83 to 3.73?
Nope, 2.73 sounds right to me.
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Old Jan 25, 2005 | 01:14 AM
  #23  
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the 3.08 was put in there by the girl who i bought the car from. she had some "work" done to the rear end by some jackasses and they put in the wrong gear. i think she might have put it in herself by the amount of noise the bitch made all the time. it DID come with 3.42's and those 3.08's sure did suck the whang.
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Old Jan 25, 2005 | 01:16 AM
  #24  
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Originally Posted by mzoomora
You will have to change your carrier for a 3.73 if you have a 3.08. Either that or thick gear/ spacer.
i'm having a rear-end shop do it, they said they will take care of whatever i need to get it right. they are supossedly the best in this area
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Old Jan 25, 2005 | 01:17 AM
  #25  
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Originally Posted by TheBlurLS1
the 3.08 was put in there by the girl who i bought the car from. she had some "work" done to the rear end by some jackasses and they put in the wrong gear. i think she might have put it in herself by the amount of noise the bitch made all the time. it DID come with 3.42's and those 3.08's sure did suck the whang.
Ok, I figured it was something like that.
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Old Jan 25, 2005 | 09:17 AM
  #26  
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Originally Posted by TheBlurLS1
i think she might have put it in herself by the amount of noise the bitch made all the time.
I'm confused, are you talking about the rearend or the girl you bought it from?

Actually I am sort of confused about the needing a new carrier to go from 3.08s to 3.73s. I know when I changed mine I went from a 2 series to a 3 series but wouldn't 3.08s have a 3 series carrier already?
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Old Jan 25, 2005 | 01:48 PM
  #27  
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Originally Posted by Anniversary "Z"
I'm confused, are you talking about the rearend or the girl you bought it from?


not sure what carrier it has in it, they will get me fixed up though. i'll ask the guy what he found after he gets into it.

his cards say Parsons Differential "keep your REAR in GEAR" lol and his website is carproctologist.com
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Old Jan 26, 2005 | 09:05 AM
  #28  
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Originally Posted by Anniversary "Z"
Actually I am sort of confused about the needing a new carrier to go from 3.08s to 3.73s. I know when I changed mine I went from a 2 series to a 3 series but wouldn't 3.08s have a 3 series carrier already?



Heres the fact: If you have a2.73's then you have a 2 series carrier. If you have the 3.42's then you have a 3 series carrier. You do not HAVE to change the carrier if you want to go from 2.73's to 3.73's. Someone may have told you that you need to because the 3.73's gears were made for a 3 series, but any gears are made for either carrier, you just need to order the right gears. If you need 2 series carrier gears, buy them from Richmond Gears.
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Old Jan 26, 2005 | 10:03 AM
  #29  
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Originally Posted by 98formulaMAH



Heres the fact: If you have a2.73's then you have a 2 series carrier. If you have the 3.42's then you have a 3 series carrier. You do not HAVE to change the carrier if you want to go from 2.73's to 3.73's. Someone may have told you that you need to because the 3.73's gears were made for a 3 series, but any gears are made for either carrier, you just need to order the right gears. If you need 2 series carrier gears, buy them from Richmond Gears.
OK since obviously I'm already sounding like a dumbass and my question hasn't been answered in my head yet I might as well spill it. I know I could have gone with a thicker gear or use spacers and just add 3.73s to my 2 series carrier, but I bought the new rearend as a whole. What I'm confused on is where is the dividing line between 2 series and 3 series. In a previous post someone said that if the guy had 3.08s than he had a 2 series carrier. If this is the case then I was wrongly under the assumpition that the 2 in 2.73s meant the carrier and the 3 in 3.08, 3.23, 3.42, etc.. meant 3 series.
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Old Jan 26, 2005 | 11:33 AM
  #30  
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Originally Posted by Anniversary "Z"
OK since obviously I'm already sounding like a dumbass and my question hasn't been answered in my head yet I might as well spill it. I know I could have gone with a thicker gear or use spacers and just add 3.73s to my 2 series carrier, but I bought the new rearend as a whole. What I'm confused on is where is the dividing line between 2 series and 3 series. In a previous post someone said that if the guy had 3.08s than he had a 2 series carrier. If this is the case then I was wrongly under the assumpition that the 2 in 2.73s meant the carrier and the 3 in 3.08, 3.23, 3.42, etc.. meant 3 series.
I never understood carrier and so forth. I do know that my 3.73's are 3 series carriers. and that out of all my 10 bolts this one has lasted me the longest.
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Old Jan 26, 2005 | 12:54 PM
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Originally Posted by 98formulaMAH



Heres the fact: If you have a2.73's then you have a 2 series carrier. If you have the 3.42's then you have a 3 series carrier. You do not HAVE to change the carrier if you want to go from 2.73's to 3.73's. Someone may have told you that you need to because the 3.73's gears were made for a 3 series, but any gears are made for either carrier, you just need to order the right gears. If you need 2 series carrier gears, buy them from Richmond Gears.
Not all gears are made for both series carriers. Anything 3.08-down is a 2 series gear, anything 3.23-up is a 3 series gear. If you are going to be doing the rear anyway, you might as well buy the proper stuff. Why add extra lb's to your ring gear by buying a thick one that will just rob more power. There are spacers you can buy, but that is weaker than the stock rear. Thick ring gears can cause pin clearance problems during assembly also.
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