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kipps · 11-19-2019, 10:25 PM

I wouldn't get too hung up on keeping a np203. np208's can be had for $150, and np205's for not much more if you look around a bit. From what I read of the np203, it's going to hurt your fuel economy a bit if using it as a daily driver.

The holy grail for ls-powered transfer cases is a np205(strong) or np241(lightweight) with passenger side drop and a vehicle speed sensor already installed. Only available in Blazers and Suburbans in 89?, 90, and 91.

What 4.8 engine are you planning to use? Gen 3 or 4? I'd caution away from doing a manual swap on a Gen 4. Should be quite doable(I hope!), but a bit more research.

11-19-2019, 10:25 PM	#13
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,099	Re: 4.8 into 74 3/4 ton 4x4 I wouldn't get too hung up on keeping a np203. np208's can be had for $150, and np205's for not much more if you look around a bit. From what I read of the np203, it's going to hurt your fuel economy a bit if using it as a daily driver. The holy grail for ls-powered transfer cases is a np205(strong) or np241(lightweight) with passenger side drop and a vehicle speed sensor already installed. Only available in Blazers and Suburbans in 89?, 90, and 91. What 4.8 engine are you planning to use? Gen 3 or 4? I'd caution away from doing a manual swap on a Gen 4. Should be quite doable(I hope!), but a bit more research. __________________ 1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome!