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therink · 10-06-2014, 02:44 AM

With the GM HD gasser, you need the optional 4:10 axle, which increases the Towing capacity to around 13,900. Most dealers dont stock 4:10 gassers. I had to factory order my current and last 2 HDs to get the 4:10.

10-06-2014, 02:44 AM	#2
therink Senior Member Join Date: May 2010 Location: Rochester, NY Posts: 1,605	With the GM HD gasser, you need the optional 4:10 axle, which increases the Towing capacity to around 13,900. Most dealers dont stock 4:10 gassers. I had to factory order my current and last 2 HDs to get the 4:10. __________________ Steve Rinker Rochester, NY 2013 Outback Sydney 340FBH (12,280 lbs loaded-scale) 2015 GMC Sierra Denali 3500HD, SRW, Duramax, CC, SB (payload 3700) https://i1109.photobucket.com/albums/...65/340FBH1.jpg