Quote:
Originally Posted by gnx7
I would stay away from the S60 due to limited gear ratios..... but if you like the few that they offer..... go for it. It also does weigh a gang load!
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So, going on a weight conservation diet (gun drilled axles, aluminum hubs, chromoly .250 tubes, disk brakes and aluminum calipers with willwood racing vented rotors) we are looking at ~250lbs for a Dana 60. It looks like a 9" is ~245lbs similarly equipped, as far as I can tell.
A quick check on Summit indicates these are the gear ratios for the Dana 60:
3.54:1
3.55:1
3.73:1
4.10:1
4.11:1
4.30:1
4.56:1
4.88:1
5.13:1
5.38:1
5.86:1
6.17:1
7.17:1
Again, according to Summit, the 9" has:
3.00:1
3.25:1
3.40:1
3.50:1
3.55:1
3.60:1
3.64:1
3.70:1
3.75:1
3.80:1
3.82:1
3.89:1
4.00:1
4.11:1
4.22:1
4.29:1
4.30:1
4.33:1
4.44:1
4.50:1
4.56:1
4.57:1
4.63:1
4.71:1
4.78:1
4.86:1
5.00:1
5.13:1
5.14:1
5.25:1
5.29:1
5.37:1
5.43:1
5.50:1
5.57:1
5.67:1
5.83:1
6.00:1
6.14:1
6.20:1
6.33:1
6.50:1
6.60:1
6.66:1
6.80:1
6.83:1
7.00:1
7.16:1
7.20:1
7.33:1
7.40:1
I'm thinking in the 3:54:1 range. It looks like the Corvette has 3.42:1 for the Z06. Remember, I'm running the 8L90E, which has:
4.56
2.97
2.08
1.69
1.27
1.00
0.85
0.65
I think the bigger issue is going to be traction with the gearing.
So, yes, your correct but I think the Dana 60 / S60 could be pretty close for this application. As well, it has less drive line losses due to its design.
One thing that this does not account for is floater style hubs, dual tapered roller bearings, etc. all desirable for situations with high side loads. I think this comes out about even between the two.
Thoughts?