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Old 09-07-2016, 11:36 PM   #1
Stockish_SS
 
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Stock diff limits

Besides the typical broken axles and 2 piece driveshafts that are typical to break.... How many issues do you guys see with the differential itself? Specifically stick cars leaving at high RPM....

The car has 3.45s and I want to out the 3.91s in it. But I'm almost scared to put money in the diff if I'm better off just doing a ZL1 diff
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Old 09-07-2016, 11:54 PM   #2
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It's all in power and traction.
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Old 09-08-2016, 12:48 AM   #3
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Quote:
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It's all in power and traction.
Bo knows......


Do the ZL1 diff and dont look back. That's what I did.
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Old 09-08-2016, 06:15 AM   #4
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The stock posi is the weak point in the stock diff. Adding a trutrac and gears starts putting the cost closer to a zl1 kit once you add axles and driveshaft.
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Old 09-08-2016, 05:14 PM   #5
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I replaced the posi less than 20 passes later this happened....

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Old 09-08-2016, 06:14 PM   #6
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depends on your tires. Sticky tires and the stock power is enough to snap one. I'm at 675 to the tires on street tires and its been holding up well so far.
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Old 09-08-2016, 08:18 PM   #7
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I'm dynoing the car Sunday. But it should make roughly 480-490 to the wheels.

I also launch at 6k on a full slick Hoosier. Mainly because of the gearing in the car I'm trying to get off the line
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Old 09-12-2016, 09:05 PM   #8
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Just put the car on the dyno yesterday. On a 85° day it put down 469hp 430tq. So I was fairly close with my guess
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Old 09-12-2016, 09:18 PM   #9
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Totally depends on whether it's a A6 or M6.

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Old 09-14-2016, 01:23 PM   #10
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Totally depends on whether it's a A6 or M6.

M6....
And when I track it, it gets quite a bit of abuse.... 6k launches
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