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gears??


 
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BamBam
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Joined: 23 Jan 2004
Location: Maryland

PostPosted: Thu Feb 12, 2004 8:40 am    Post subject: gears?? Reply with quote

ok...how close do gears have to be??
from what i recall its 1/10th or 1/100th...

3.50 and 3.54
4.86 and 4.88

hmmm, anyone????
thanks
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jpxj
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Joined: 31 Jan 2004
Location: York, PA

PostPosted: Thu Feb 12, 2004 2:04 pm    Post subject: Reply with quote

Here is some info on it. Scroll down to the 'Small Details Make A Big Difference*' link.
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Black2001TJ
Leopard Skin
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Joined: 03 Jan 2004

PostPosted: Thu Feb 12, 2004 3:58 pm    Post subject: Reply with quote

Great article, here's a quote from it that may help!

Quote:
There are a lot of opinions as to how much carrier run-out is acceptable. I have seen as little as 0.005" cause problems and I have seen rearends work fine with 0.009" or more. The main thing that I look at is backlash variation. I like to keep the backlash variation under 0.005" if possible. In a perfect world no variation would be our goal. However, even with a straight case the backlash can vary 0.005" without any negative consequences, so this is an area where each assembler will have to decide how much they are willing to allow.

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Tx Outlaw
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Joined: 05 Jan 2004
Location: Texas

PostPosted: Thu Feb 12, 2004 5:26 pm    Post subject: Reply with quote

Black2001TJ wrote:
Great article, here's a quote from it that may help!

Quote:
There are a lot of opinions as to how much carrier run-out is acceptable. I have seen as little as 0.005" cause problems and I have seen rearends work fine with 0.009" or more. The main thing that I look at is backlash variation. I like to keep the backlash variation under 0.005" if possible. In a perfect world no variation would be our goal. However, even with a straight case the backlash can vary 0.005" without any negative consequences, so this is an area where each assembler will have to decide how much they are willing to allow.


That's run-out and backlash. He's wanting differences in front to rear axle ratios.
I've seen as much as .04 work fine. The main deal is allowance of slippage while in 4wd. The harder the surface you wheel on, the closer the gears need to be. Remember, even differences in tire pressures and load of the vehicle can cause differences in overall gear ratio aspects.
Hope this helps.

Chuck
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