The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 88 crew cab 4x4 single wheel conversion with 02 Cummins/allison auto

gtdownonit · 02-12-2012, 08:05 PM

I did 6 inches of lift by springs with the added leaf to the front for the cummins. I also did a 1 inch body lift for a bit more room under the cab for the tranny. With the 6 inches The 37s fit great. I also have 4.56 gears and they need to be closer to 3.72. Top speed is 83 MPH with an NV4500.

02-12-2012, 08:05 PM	#10
gtdownonit Registered User Join Date: Oct 2010 Location: denver co Posts: 27	Re: 88 crew cab 4x4 single wheel conversion with 02 Cummins/allison auto I did 6 inches of lift by springs with the added leaf to the front for the cummins. I also did a 1 inch body lift for a bit more room under the cab for the tranny. With the 6 inches The 37s fit great. I also have 4.56 gears and they need to be closer to 3.72. Top speed is 83 MPH with an NV4500.