The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - The Story Of A Cummins Suburban (Lots Of Pics)

1985-GMC · 01-13-2016, 11:47 AM

Ok cool, that's exactly what I needed to make up my mind. I've been back and forth for the last several months trying to decide, plus it will cost about $700 extra. I was also concerned about the strength of the range box with the torque of the Cummins and what long distance travel might do to it, not to mention it being just one more piece to break. I think you're running 35s and I'll be running 37s so according to my little gear calculator app it'll only be about 40 rpm different at 5 mph and 100 rpm at 100 mph so I think I'll just run with that for now. And if I win the power ball tonight I'll go ahead and buy a lomax 205 haha

01-13-2016, 11:47 AM	#1194
1985-GMC Chevy Enthusiast Join Date: Jul 2009 Location: Canyon Lake Texas Posts: 2,024	Re: The Story Of A Cummins Suburban (Lots Of Pics) Ok cool, that's exactly what I needed to make up my mind. I've been back and forth for the last several months trying to decide, plus it will cost about $700 extra. I was also concerned about the strength of the range box with the torque of the Cummins and what long distance travel might do to it, not to mention it being just one more piece to break. I think you're running 35s and I'll be running 37s so according to my little gear calculator app it'll only be about 40 rpm different at 5 mph and 100 rpm at 100 mph so I think I'll just run with that for now. And if I win the power ball tonight I'll go ahead and buy a lomax 205 haha __________________ Tony 1985 GMC K2500 restoration Project: Rust, White & Blue 1989 Chevy R3500 CC Cummins & 4X4 swap some day... 1989 Burb (D60, 14BFF, 12V, NV4500, NP205, 37" tires in progress)