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Old 07-10-2015, 06:57 AM   #51
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Location: Mount Laurel, NJ
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Originally Posted by foretm View Post
1st = 3.51:1
2nd = 1.90:1
3rd = 1.44:1
4th = 1.00:1
5th = .74:1
6th = .64:1

TC Ratio
TC-210 = 2.05
TC-211 = 1.91
TC-221 = 1.73
TC-222 = 1.58

Rear ratio. All I could find was from a 2015 newmar brochure on an XCR chassis:

Wow, I found that math still works. With some assumptions and using the 4.78 axle ratio and a TC of two, I found that the grade that would halt a Berk with a GCWR of 33,000lbs and rated torque of 660 ft-lbs is very approximately:

15% grade with a 25% loss through the drive train.
17% grade with a 15% loss through the drive train.

Gale & Hank- 2012 Berkshire 390BH
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